<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/AccumulatedOtherComprehensiveIncomeLossByComponentDetails" xlink:href="jll-20161231.xsd#AccumulatedOtherComprehensiveIncomeLossByComponentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/AccumulatedOtherComprehensiveIncomeLossByComponentNotes" xlink:href="jll-20161231.xsd#AccumulatedOtherComprehensiveIncomeLossByComponentNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/AccumulatedOtherComprehensiveIncomeLossByComponentTables" xlink:href="jll-20161231.xsd#AccumulatedOtherComprehensiveIncomeLossByComponentTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssets" xlink:href="jll-20161231.xsd#BusinessCombinationsGoodwillAndOtherIntangibleAssets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssetsBusinessCombinationsActivityDetails" xlink:href="jll-20161231.xsd#BusinessCombinationsGoodwillAndOtherIntangibleAssetsBusinessCombinationsActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssetsGoodwillDetails" xlink:href="jll-20161231.xsd#BusinessCombinationsGoodwillAndOtherIntangibleAssetsGoodwillDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssetsOtherIntangiblesBySegmentDetails" xlink:href="jll-20161231.xsd#BusinessCombinationsGoodwillAndOtherIntangibleAssetsOtherIntangiblesBySegmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssetsTables" xlink:href="jll-20161231.xsd#BusinessCombinationsGoodwillAndOtherIntangibleAssetsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessSegments" xlink:href="jll-20161231.xsd#BusinessSegments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsAssetsDetails" xlink:href="jll-20161231.xsd#BusinessSegmentsAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsCurrenciesDetails" xlink:href="jll-20161231.xsd#BusinessSegmentsCurrenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsDetails" xlink:href="jll-20161231.xsd#BusinessSegmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsPropertyAndEquipmentExpendituresDetails" xlink:href="jll-20161231.xsd#BusinessSegmentsPropertyAndEquipmentExpendituresDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsTables" xlink:href="jll-20161231.xsd#BusinessSegmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/CommitmentsAndContingencies" xlink:href="jll-20161231.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesTables" xlink:href="jll-20161231.xsd#CommitmentsAndContingenciesCommitmentsAndContingenciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/CommitmentsAndContingenciesDetails" xlink:href="jll-20161231.xsd#CommitmentsAndContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/ConsolidatedBalanceSheets" xlink:href="jll-20161231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="jll-20161231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/ConsolidatedStatementOfChangeInEquity" xlink:href="jll-20161231.xsd#ConsolidatedStatementOfChangeInEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/ConsolidatedStatementOfChangeInEquityParenthetical" xlink:href="jll-20161231.xsd#ConsolidatedStatementOfChangeInEquityParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="jll-20161231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="jll-20161231.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/Debt" xlink:href="jll-20161231.xsd#Debt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/DebtDetails" xlink:href="jll-20161231.xsd#DebtDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/DebtScheduleOfLongTermDebtInstrumentsDetails" xlink:href="jll-20161231.xsd#DebtScheduleOfLongTermDebtInstrumentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/DebtScheduleOfLongTermDebtInstrumentsTables" xlink:href="jll-20161231.xsd#DebtScheduleOfLongTermDebtInstrumentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/DebtWarehouseFacilitiesDetails" xlink:href="jll-20161231.xsd#DebtWarehouseFacilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/DebtWarehouseFacilitiesTables" xlink:href="jll-20161231.xsd#DebtWarehouseFacilitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/DocumentAndEntityInformation" xlink:href="jll-20161231.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurements" xlink:href="jll-20161231.xsd#FairValueMeasurements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurementsAssetsAndLiabilitiesMeasuredOnRecurringBasisDetails" xlink:href="jll-20161231.xsd#FairValueMeasurementsAssetsAndLiabilitiesMeasuredOnRecurringBasisDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurementsDetails" xlink:href="jll-20161231.xsd#FairValueMeasurementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurementsFairValueMeasurementsRecurringAndNonrecurringDetails" xlink:href="jll-20161231.xsd#FairValueMeasurementsFairValueMeasurementsRecurringAndNonrecurringDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurementsTables" xlink:href="jll-20161231.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxes" xlink:href="jll-20161231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:href="jll-20161231.xsd#IncomeTaxesDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesForeignIncomeTaxDetails" xlink:href="jll-20161231.xsd#IncomeTaxesForeignIncomeTaxDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesIncomeBeforeTaxesDomesticAndInternationalDetails" xlink:href="jll-20161231.xsd#IncomeTaxesIncomeBeforeTaxesDomesticAndInternationalDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesIncomeTaxExpenseAndTaxRateReconciliationDetails" xlink:href="jll-20161231.xsd#IncomeTaxesIncomeTaxExpenseAndTaxRateReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesInterestExpenseDetails" xlink:href="jll-20161231.xsd#IncomeTaxesInterestExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesProvisionForIncomeTaxesDetails" xlink:href="jll-20161231.xsd#IncomeTaxesProvisionForIncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesTables" xlink:href="jll-20161231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesTaxLiabilityAndUncertaintiesDetails" xlink:href="jll-20161231.xsd#IncomeTaxesTaxLiabilityAndUncertaintiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:href="jll-20161231.xsd#IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesValuationAllowanceDetails" xlink:href="jll-20161231.xsd#IncomeTaxesValuationAllowanceDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/InvestmentsInRealEstateVentures" xlink:href="jll-20161231.xsd#InvestmentsInRealEstateVentures" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/InvestmentsInRealEstateVenturesDetails" xlink:href="jll-20161231.xsd#InvestmentsInRealEstateVenturesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/InvestmentsInRealEstateVenturesTables" xlink:href="jll-20161231.xsd#InvestmentsInRealEstateVenturesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/Leases" xlink:href="jll-20161231.xsd#Leases" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/LeasesDetails" xlink:href="jll-20161231.xsd#LeasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/LeasesTables" xlink:href="jll-20161231.xsd#LeasesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/Organization" xlink:href="jll-20161231.xsd#Organization" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/OrganizationDetails" xlink:href="jll-20161231.xsd#OrganizationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/OrganizationTables" xlink:href="jll-20161231.xsd#OrganizationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/QuarterlyResultsOfOperationsUnaudited" xlink:href="jll-20161231.xsd#QuarterlyResultsOfOperationsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/QuarterlyResultsOfOperationsUnauditedDetails" xlink:href="jll-20161231.xsd#QuarterlyResultsOfOperationsUnauditedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/QuarterlyResultsOfOperationsUnauditedTables" xlink:href="jll-20161231.xsd#QuarterlyResultsOfOperationsUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/RestructuringAndAcquisitionCharges" xlink:href="jll-20161231.xsd#RestructuringAndAcquisitionCharges" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/RestructuringAndAcquisitionChargesDetails" xlink:href="jll-20161231.xsd#RestructuringAndAcquisitionChargesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/RestructuringAndAcquisitionChargesTables" xlink:href="jll-20161231.xsd#RestructuringAndAcquisitionChargesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/RetirementPlans" xlink:href="jll-20161231.xsd#RetirementPlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/RetirementPlansDetails" xlink:href="jll-20161231.xsd#RetirementPlansDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/RetirementPlansTables" xlink:href="jll-20161231.xsd#RetirementPlansTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/StockBasedCompensation" xlink:href="jll-20161231.xsd#StockBasedCompensation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/StockBasedCompensationDetails" xlink:href="jll-20161231.xsd#StockBasedCompensationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/StockBasedCompensationTables" xlink:href="jll-20161231.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SubsequentEvents" xlink:href="jll-20161231.xsd#SubsequentEvents" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SubsequentEventsDetails" xlink:href="jll-20161231.xsd#SubsequentEventsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SubsequentEventsSubsequentEventTables" xlink:href="jll-20161231.xsd#SubsequentEventsSubsequentEventTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="jll-20161231.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesAccountsReceivableDetails" xlink:href="jll-20161231.xsd#SummaryOfSignificantAccountingPoliciesAccountsReceivableDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesDetails" xlink:href="jll-20161231.xsd#SummaryOfSignificantAccountingPoliciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="jll-20161231.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:href="jll-20161231.xsd#SummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:href="jll-20161231.xsd#SummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesWarehouseReceivablesAndFacilitiesDetails" xlink:href="jll-20161231.xsd#SummaryOfSignificantAccountingPoliciesWarehouseReceivablesAndFacilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/TransactionsWithAffiliates" xlink:href="jll-20161231.xsd#TransactionsWithAffiliates" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/TransactionsWithAffiliatesDetails" xlink:href="jll-20161231.xsd#TransactionsWithAffiliatesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.us.amjoneslanglasalle.com/role/TransactionsWithAffiliatesTables" xlink:href="jll-20161231.xsd#TransactionsWithAffiliatesTables" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/AccumulatedOtherComprehensiveIncomeLossByComponentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4EF063975982AF034AF16417E5D9A04E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4EF063975982AF034AF16417E5D9A04E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_69809321705FB590B93A6417E5D9AA90" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4EF063975982AF034AF16417E5D9A04E" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_69809321705FB590B93A6417E5D9AA90" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_5A5C175F9E5912B9DB676417E5D931BE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_69809321705FB590B93A6417E5D9AA90" xlink:to="loc_us-gaap_EquityComponentDomain_5A5C175F9E5912B9DB676417E5D931BE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_5A5C175F9E5912B9DB676417E5D931BE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_69809321705FB590B93A6417E5D9AA90" xlink:to="loc_us-gaap_EquityComponentDomain_5A5C175F9E5912B9DB676417E5D931BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_6690EC7F575F7EDA4C796417E5DA88FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5A5C175F9E5912B9DB676417E5D931BE" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_6690EC7F575F7EDA4C796417E5DA88FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_53F9CCC8565FDE45D6A16417E5DA1E4D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5A5C175F9E5912B9DB676417E5D931BE" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_53F9CCC8565FDE45D6A16417E5DA1E4D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_5A06712905003BA6A9CE6417E5DA2BE8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5A5C175F9E5912B9DB676417E5D931BE" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_5A06712905003BA6A9CE6417E5DA2BE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_15F85AAF1E2257FB0F416417E5DAAE20" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_15F85AAF1E2257FB0F416417E5DAAE20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_2596587CEB3F19BA35CF6417E5DA89AA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_2596587CEB3F19BA35CF6417E5DA89AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_BC6BABBEC09BDCBDE6B36417E5DBA6EB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_BC6BABBEC09BDCBDE6B36417E5DBA6EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_95364FB596909CD08B906417E5DBE555" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_95364FB596909CD08B906417E5DBE555" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_47987DA1067DAB813C066417E5DB8DBA" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_47987DA1067DAB813C066417E5DB8DBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_7A66108D6FB14FDEF7746417E5DB675B" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_7A66108D6FB14FDEF7746417E5DB675B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_0E6543C5CDB7F8C617F06417E5E0A6A9" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_0E6543C5CDB7F8C617F06417E5E0A6A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_DF13056BECBFE7D548636417E5E092C6" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_5438339EAD3002E8D79E6417E5DA5891" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_DF13056BECBFE7D548636417E5E092C6" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/AccumulatedOtherComprehensiveIncomeLossByComponentNotes" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/AccumulatedOtherComprehensiveIncomeLossByComponentTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssets" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssetsBusinessCombinationsActivityDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_98480DB33CEE4E2D552D63F89FF83D7B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_98480DB33CEE4E2D552D63F89FF83D7B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="jll-20161231.xsd#jll_IndianOperationsAxis" xlink:label="loc_jll_IndianOperationsAxis_66A941E04C7F91F0EBA263F89FF80E52" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_98480DB33CEE4E2D552D63F89FF83D7B" xlink:to="loc_jll_IndianOperationsAxis_66A941E04C7F91F0EBA263F89FF80E52" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_IndianOperationsDomain" xlink:label="loc_jll_IndianOperationsDomain_D76BF07E11E03AC916FD63F89FF87F5F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_IndianOperationsAxis_66A941E04C7F91F0EBA263F89FF80E52" xlink:to="loc_jll_IndianOperationsDomain_D76BF07E11E03AC916FD63F89FF87F5F_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_IndianOperationsDomain" xlink:label="loc_jll_IndianOperationsDomain_D76BF07E11E03AC916FD63F89FF87F5F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_IndianOperationsAxis_66A941E04C7F91F0EBA263F89FF80E52" xlink:to="loc_jll_IndianOperationsDomain_D76BF07E11E03AC916FD63F89FF87F5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_E2BD5D8A2DB355E735A963F89FF847F4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_98480DB33CEE4E2D552D63F89FF83D7B" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_E2BD5D8A2DB355E735A963F89FF847F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_483B2395FD3C8FAF65D763F89FF85F77_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_E2BD5D8A2DB355E735A963F89FF847F4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_483B2395FD3C8FAF65D763F89FF85F77_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_483B2395FD3C8FAF65D763F89FF85F77" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_E2BD5D8A2DB355E735A963F89FF847F4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_483B2395FD3C8FAF65D763F89FF85F77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NumberOfBusinessesAcquired" xlink:label="loc_us-gaap_NumberOfBusinessesAcquired_296C939DA35D9DA5C44D63F89FF837B7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_NumberOfBusinessesAcquired_296C939DA35D9DA5C44D63F89FF837B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_A5B396C1A3D4A1B5C80863F89FF9C066" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_A5B396C1A3D4A1B5C80863F89FF9C066" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_BusinessCombinationsGuaranteedDeferredAcquisitionObligation" xlink:label="loc_jll_BusinessCombinationsGuaranteedDeferredAcquisitionObligation_B4F7A3B2FDC4D4BDF38863F89FF9F854" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_jll_BusinessCombinationsGuaranteedDeferredAcquisitionObligation_B4F7A3B2FDC4D4BDF38863F89FF9F854" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_BA65F9262ADDDF3F35F163F89FFAEC96" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_BA65F9262ADDDF3F35F163F89FFAEC96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_A7DD05FBF19E12F9EA7A63F89FFA1A40" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_A7DD05FBF19E12F9EA7A63F89FFA1A40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_5AB9396DBB82B283EB9D63F89FFAD56D" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_5AB9396DBB82B283EB9D63F89FFAD56D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_9A2E400B887161EB88F763F89FFA7D30" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_9A2E400B887161EB88F763F89FFA7D30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_C88A0B22027514DA7BF663F89FFA3EA3" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_C88A0B22027514DA7BF663F89FFA3EA3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual" xlink:label="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_7E6B3EE8A184C7DBC55263F89FFA3313" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual_7E6B3EE8A184C7DBC55263F89FFA3313" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_714D6A31895A0288ED1A63F89FFAAFAD" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_714D6A31895A0288ED1A63F89FFAAFAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_9F1566F9BE16BBCF6B4D63F89FFAE313" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_9F1566F9BE16BBCF6B4D63F89FFAE313" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_MinorityShareholderRedemptionLiabilityCurrent" xlink:label="loc_jll_MinorityShareholderRedemptionLiabilityCurrent_7223AEB719E0E82B5FF963F89FFA5B60" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_jll_MinorityShareholderRedemptionLiabilityCurrent_7223AEB719E0E82B5FF963F89FFA5B60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_9E9F27C35B68199F629263F89FFA758F" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_9E9F27C35B68199F629263F89FFA758F" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DeferredAcquisitionObligationsPaid" xlink:label="loc_jll_DeferredAcquisitionObligationsPaid_3BF1C05A5C8F45F2525963F89FFA1E40" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_jll_DeferredAcquisitionObligationsPaid_3BF1C05A5C8F45F2525963F89FFA1E40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest_8381F41765E68D7C09EA63F89FFAF8C1" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest_8381F41765E68D7C09EA63F89FFAF8C1" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_GoodwillAdditionsNetOfAdjustments" xlink:label="loc_jll_GoodwillAdditionsNetOfAdjustments_7531EA488EC42F7BA89763F89FFA9F50" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_jll_GoodwillAdditionsNetOfAdjustments_7531EA488EC42F7BA89763F89FFA9F50" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount" xlink:label="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_341A576911820A3ED1DF63F89FFA46CF" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_341A576911820A3ED1DF63F89FFA46CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage" xlink:label="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage_66454C39238FF1CF346863F89FFA0892" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage_66454C39238FF1CF346863F89FFA0892" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_CashPaidForNewAcquisitionsAndContingentEarnOutConsideration" xlink:label="loc_jll_CashPaidForNewAcquisitionsAndContingentEarnOutConsideration_A65652CC751E26F58C0D63F89FFA7B9E" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_jll_CashPaidForNewAcquisitionsAndContingentEarnOutConsideration_A65652CC751E26F58C0D63F89FFA7B9E" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RedeemableNoncontrollingInterestAcquisitionDateFairValue" xlink:label="loc_jll_RedeemableNoncontrollingInterestAcquisitionDateFairValue_CFA5BACEC3A28E535E3F63F89FFA4194" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_jll_RedeemableNoncontrollingInterestAcquisitionDateFairValue_CFA5BACEC3A28E535E3F63F89FFA4194" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillOtherIncreaseDecrease" xlink:label="loc_us-gaap_GoodwillOtherIncreaseDecrease_AABCFB278C232D29B99963F89FFBB5EC" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_GoodwillOtherIncreaseDecrease_AABCFB278C232D29B99963F89FFBB5EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_0F0719AAF890027619A963F89FFB0919" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_0F0719AAF890027619A963F89FFB0919" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_NumberOfAcquisitionsSubjectToPotentialEarnOutPaymentsProvisions" xlink:label="loc_jll_NumberOfAcquisitionsSubjectToPotentialEarnOutPaymentsProvisions_F1FD3A971DAE039B96AB63F89FFB7B14" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_jll_NumberOfAcquisitionsSubjectToPotentialEarnOutPaymentsProvisions_F1FD3A971DAE039B96AB63F89FFB7B14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_A0E493D54421DAD577D563F89FFB2EC2" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_763BCE89221A46EA7FC663F89FF860FD" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_A0E493D54421DAD577D563F89FFB2EC2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssetsGoodwillDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillLineItems" xlink:label="loc_us-gaap_GoodwillLineItems_5BC59F923BC9B705435B59D190D02136" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_153047D5A43B267DC17359D190CD0D59" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_5BC59F923BC9B705435B59D190D02136" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_153047D5A43B267DC17359D190CD0D59" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_A4EC21C2F1B0E6BADE1459D190CDBD26" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_153047D5A43B267DC17359D190CD0D59" xlink:to="loc_us-gaap_StatementGeographicalAxis_A4EC21C2F1B0E6BADE1459D190CDBD26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_242F83D81FFC5C417B0F59D190CD13E0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_A4EC21C2F1B0E6BADE1459D190CDBD26" xlink:to="loc_us-gaap_SegmentGeographicalDomain_242F83D81FFC5C417B0F59D190CD13E0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_242F83D81FFC5C417B0F59D190CD13E0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_A4EC21C2F1B0E6BADE1459D190CDBD26" xlink:to="loc_us-gaap_SegmentGeographicalDomain_242F83D81FFC5C417B0F59D190CD13E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmericasMember" xlink:label="loc_us-gaap_AmericasMember_81D8651517DB4287236059D190CE62ED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_242F83D81FFC5C417B0F59D190CD13E0" xlink:to="loc_us-gaap_AmericasMember_81D8651517DB4287236059D190CE62ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EMEAMember" xlink:label="loc_us-gaap_EMEAMember_9743F1DE87386963868759D190CFAEE1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_242F83D81FFC5C417B0F59D190CD13E0" xlink:to="loc_us-gaap_EMEAMember_9743F1DE87386963868759D190CFAEE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_62F1F12CDF0B0B9CAEB459D190CFBB6A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_242F83D81FFC5C417B0F59D190CD13E0" xlink:to="loc_us-gaap_AsiaPacificMember_62F1F12CDF0B0B9CAEB459D190CFBB6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_EA703575B64D872E3A1759D190D0BDB6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_153047D5A43B267DC17359D190CD0D59" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_EA703575B64D872E3A1759D190D0BDB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C07558D421C6CA1E8A2B59D190D0C00C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_EA703575B64D872E3A1759D190D0BDB6" xlink:to="loc_us-gaap_SegmentDomain_C07558D421C6CA1E8A2B59D190D0C00C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C07558D421C6CA1E8A2B59D190D0C00C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_EA703575B64D872E3A1759D190D0BDB6" xlink:to="loc_us-gaap_SegmentDomain_C07558D421C6CA1E8A2B59D190D0C00C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReportableSubsegmentsMember" xlink:label="loc_us-gaap_ReportableSubsegmentsMember_E85E59576F80D172642C59D190D08AC8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C07558D421C6CA1E8A2B59D190D0C00C" xlink:to="loc_us-gaap_ReportableSubsegmentsMember_E85E59576F80D172642C59D190D08AC8" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_InvestmentManagementMember" xlink:label="loc_jll_InvestmentManagementMember_C50104C29E4EF2D1C5C859D190D0C55D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C07558D421C6CA1E8A2B59D190D0C00C" xlink:to="loc_jll_InvestmentManagementMember_C50104C29E4EF2D1C5C859D190D0C55D" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_MinorityShareholderRedemptionLiabilityCurrent" xlink:label="loc_jll_MinorityShareholderRedemptionLiabilityCurrent_7E9D78E800918D6F92B159D190D08809" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_5BC59F923BC9B705435B59D190D02136" xlink:to="loc_jll_MinorityShareholderRedemptionLiabilityCurrent_7E9D78E800918D6F92B159D190D08809" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_E51EF30E05AE23250ECB59D190D04CFB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_5BC59F923BC9B705435B59D190D02136" xlink:to="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_E51EF30E05AE23250ECB59D190D04CFB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5E666496C799D2E1BFF059D190D0A904" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_5BC59F923BC9B705435B59D190D02136" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_5E666496C799D2E1BFF059D190D0A904" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_6790A07F13F86C8CE12759D190D0729C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_5BC59F923BC9B705435B59D190D02136" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_6790A07F13F86C8CE12759D190D0729C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_77CBAF62EA9841C724D059D190D1696F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_5BC59F923BC9B705435B59D190D02136" xlink:to="loc_us-gaap_GoodwillRollForward_77CBAF62EA9841C724D059D190D1696F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_00C4EDAC9878FA4AE76059D190D190DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_77CBAF62EA9841C724D059D190D1696F" xlink:to="loc_us-gaap_Goodwill_00C4EDAC9878FA4AE76059D190D190DD" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_GoodwillAdditionsNetOfAdjustments" xlink:label="loc_jll_GoodwillAdditionsNetOfAdjustments_CD7E8DF035AA8B12DBD359D190D16A00" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_77CBAF62EA9841C724D059D190D1696F" xlink:to="loc_jll_GoodwillAdditionsNetOfAdjustments_CD7E8DF035AA8B12DBD359D190D16A00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_796482FFEA0EB154FF6159D190D15E42" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_77CBAF62EA9841C724D059D190D1696F" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_796482FFEA0EB154FF6159D190D15E42" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssetsOtherIntangiblesBySegmentDetails" xlink:type="extended">
    <link:loc xlink:href="jll-20161231.xsd#jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems" xlink:label="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:type="locator" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentTable" xlink:label="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentTable_1A6E25C4357FEDE1BF9D5F00EC40E19E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentTable_1A6E25C4357FEDE1BF9D5F00EC40E19E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_E3F76C45017FED02DA1A5F00EC40398A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentTable_1A6E25C4357FEDE1BF9D5F00EC40E19E" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_E3F76C45017FED02DA1A5F00EC40398A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3EAD1AB4CE41EFD9E1355F00EC400A92_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_E3F76C45017FED02DA1A5F00EC40398A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3EAD1AB4CE41EFD9E1355F00EC400A92_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3EAD1AB4CE41EFD9E1355F00EC400A92" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_E3F76C45017FED02DA1A5F00EC40398A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3EAD1AB4CE41EFD9E1355F00EC400A92" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_MortgageservicingrightsMember" xlink:label="loc_jll_MortgageservicingrightsMember_CEB64CA393C4D7FC59FA5F00EC40789F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3EAD1AB4CE41EFD9E1355F00EC400A92" xlink:to="loc_jll_MortgageservicingrightsMember_CEB64CA393C4D7FC59FA5F00EC40789F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_CEFF3FB346BCF2E92E495F00EC40C056" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_3EAD1AB4CE41EFD9E1355F00EC400A92" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_CEFF3FB346BCF2E92E495F00EC40C056" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_9E4949D48FF9518CD3225F00EC407875" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentTable_1A6E25C4357FEDE1BF9D5F00EC40E19E" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_9E4949D48FF9518CD3225F00EC407875" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_790752B9D091E53503D15F00EC4008F2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9E4949D48FF9518CD3225F00EC407875" xlink:to="loc_us-gaap_SegmentDomain_790752B9D091E53503D15F00EC4008F2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_790752B9D091E53503D15F00EC4008F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9E4949D48FF9518CD3225F00EC407875" xlink:to="loc_us-gaap_SegmentDomain_790752B9D091E53503D15F00EC4008F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReportableSubsegmentsMember" xlink:label="loc_us-gaap_ReportableSubsegmentsMember_BFE4CB28CA0B6DC94BE25F00EC40D86B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_790752B9D091E53503D15F00EC4008F2" xlink:to="loc_us-gaap_ReportableSubsegmentsMember_BFE4CB28CA0B6DC94BE25F00EC40D86B" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_InvestmentManagementMember" xlink:label="loc_jll_InvestmentManagementMember_0A2321C44922B329BDB35F00EC409720" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_790752B9D091E53503D15F00EC4008F2" xlink:to="loc_jll_InvestmentManagementMember_0A2321C44922B329BDB35F00EC409720" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_18149DF343964D45951E5F00EC403D9E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentTable_1A6E25C4357FEDE1BF9D5F00EC40E19E" xlink:to="loc_us-gaap_StatementGeographicalAxis_18149DF343964D45951E5F00EC403D9E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_2339484875D8A15602165F00EC40A47F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_18149DF343964D45951E5F00EC403D9E" xlink:to="loc_us-gaap_SegmentGeographicalDomain_2339484875D8A15602165F00EC40A47F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_2339484875D8A15602165F00EC40A47F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_18149DF343964D45951E5F00EC403D9E" xlink:to="loc_us-gaap_SegmentGeographicalDomain_2339484875D8A15602165F00EC40A47F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmericasMember" xlink:label="loc_us-gaap_AmericasMember_B3DC3D7984AC29CEC8E35F00EC40FCE9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_2339484875D8A15602165F00EC40A47F" xlink:to="loc_us-gaap_AmericasMember_B3DC3D7984AC29CEC8E35F00EC40FCE9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EMEAMember" xlink:label="loc_us-gaap_EMEAMember_F6CC97E8BB76C40D0AED5F00EC40DE28" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_2339484875D8A15602165F00EC40A47F" xlink:to="loc_us-gaap_EMEAMember_F6CC97E8BB76C40D0AED5F00EC40DE28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_983F09E205EB9FC2115B5F00EC406627" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_2339484875D8A15602165F00EC40A47F" xlink:to="loc_us-gaap_AsiaPacificMember_983F09E205EB9FC2115B5F00EC406627" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_FiniteAndIndefiniteLivedIntangibleAssetsGross" xlink:label="loc_jll_FiniteAndIndefiniteLivedIntangibleAssetsGross_497811F4B71CD177A8895F00EC40D5CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_jll_FiniteAndIndefiniteLivedIntangibleAssetsGross_497811F4B71CD177A8895F00EC40D5CD" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_FiniteAndIndefiniteLivedIntangibleAssetsAdditions" xlink:label="loc_jll_FiniteAndIndefiniteLivedIntangibleAssetsAdditions_879FC79298E82C30B5005F00EC40EEAB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_jll_FiniteAndIndefiniteLivedIntangibleAssetsAdditions_879FC79298E82C30B5005F00EC40EEAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_99FC8B4EB7ADEA5A7C255F00EC40EE49" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_99FC8B4EB7ADEA5A7C255F00EC40EE49" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_FiniteAndIndefiniteLivedIntangibleAssetsTranslationAdjustments" xlink:label="loc_jll_FiniteAndIndefiniteLivedIntangibleAssetsTranslationAdjustments_76659AF2F90B2A0DD3AE5F00EC4082C8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_jll_FiniteAndIndefiniteLivedIntangibleAssetsTranslationAdjustments_76659AF2F90B2A0DD3AE5F00EC4082C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_4C9AA291CB845ECD8CD45F00EC4080CE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_4C9AA291CB845ECD8CD45F00EC4080CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_B4B66590F865D738ED4D5F00EC4085E0" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_B4B66590F865D738ED4D5F00EC4085E0" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AccumulatedAmortizationFiniteLivedIntangibleAssetsTranslationAdjustments" xlink:label="loc_jll_AccumulatedAmortizationFiniteLivedIntangibleAssetsTranslationAdjustments_0236210EBC2839F85BE15F00EC406383" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_jll_AccumulatedAmortizationFiniteLivedIntangibleAssetsTranslationAdjustments_0236210EBC2839F85BE15F00EC406383" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_FC77D755FDB05E6D97F05F00EC405618" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_FC77D755FDB05E6D97F05F00EC405618" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_B11659CBEBFD6030615F5F00EC402C91" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_B11659CBEBFD6030615F5F00EC402C91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_C29727202DE670D294275F00EC40627E" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_C29727202DE670D294275F00EC40627E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_3A8A194CD3580CE229415F00EC40E273" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfFiniteAndIndefiniteLivedIntangibleAssetsBySegmentLineItems_2B05C8099B542CDCE4F75F00EC40CAFE" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_3A8A194CD3580CE229415F00EC40E273" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_25777CF0FD802689BB225F00EC40FAB3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_3A8A194CD3580CE229415F00EC40E273" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_25777CF0FD802689BB225F00EC40FAB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_E5C678C9D24860455CA35F00EC40FFE9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_3A8A194CD3580CE229415F00EC40E273" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_E5C678C9D24860455CA35F00EC40FFE9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_B34D67BD34FA0DB0B88F5F00EC40F856" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_3A8A194CD3580CE229415F00EC40E273" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_B34D67BD34FA0DB0B88F5F00EC40F856" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_28DD919206043E78D1B35F00EC4092BD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_3A8A194CD3580CE229415F00EC40E273" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_28DD919206043E78D1B35F00EC4092BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_656C6BDABE9A8F3958E65F00EC409D54" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_3A8A194CD3580CE229415F00EC40E273" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_656C6BDABE9A8F3958E65F00EC409D54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_5D8483CD9C606B7E85655F00EC40EAFD" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_3A8A194CD3580CE229415F00EC40E273" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_5D8483CD9C606B7E85655F00EC40EAFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_1893F837B53D90A6B7B75F00EC40097B" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsFutureAmortizationExpenseCurrentAndFiveSucceedingFiscalYearsAbstract_3A8A194CD3580CE229415F00EC40E273" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_1893F837B53D90A6B7B75F00EC40097B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessCombinationsGoodwillAndOtherIntangibleAssetsTables" xlink:type="extended">
    <link:loc xlink:href="jll-20161231.xsd#jll_BusinessAcquistionProFormaResultsLineItems" xlink:label="loc_jll_BusinessAcquistionProFormaResultsLineItems_B88497CD05165EE17AEE6DD30FBA507C" xlink:type="locator" />
    <link:loc xlink:href="jll-20161231.xsd#jll_BusinessAcquistionProFormaResultsTable" xlink:label="loc_jll_BusinessAcquistionProFormaResultsTable_A914D66F3BF2AA5F3A636DD30FBAD0FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jll_BusinessAcquistionProFormaResultsLineItems_B88497CD05165EE17AEE6DD30FBA507C" xlink:to="loc_jll_BusinessAcquistionProFormaResultsTable_A914D66F3BF2AA5F3A636DD30FBAD0FE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="jll-20161231.xsd#jll_BusinessAcquisitionProFormaResultsAxis" xlink:label="loc_jll_BusinessAcquisitionProFormaResultsAxis_6B88E61EFC6AD7F7D3C86DD30FBA7C54" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jll_BusinessAcquistionProFormaResultsTable_A914D66F3BF2AA5F3A636DD30FBAD0FE" xlink:to="loc_jll_BusinessAcquisitionProFormaResultsAxis_6B88E61EFC6AD7F7D3C86DD30FBA7C54" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_BusinessAcquisitionProFormaResultsDomain" xlink:label="loc_jll_BusinessAcquisitionProFormaResultsDomain_738E86A5C413AAF9C9F86DD30FBA6959_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_BusinessAcquisitionProFormaResultsAxis_6B88E61EFC6AD7F7D3C86DD30FBA7C54" xlink:to="loc_jll_BusinessAcquisitionProFormaResultsDomain_738E86A5C413AAF9C9F86DD30FBA6959_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_BusinessAcquisitionProFormaResultsDomain" xlink:label="loc_jll_BusinessAcquisitionProFormaResultsDomain_738E86A5C413AAF9C9F86DD30FBA6959" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_BusinessAcquisitionProFormaResultsAxis_6B88E61EFC6AD7F7D3C86DD30FBA7C54" xlink:to="loc_jll_BusinessAcquisitionProFormaResultsDomain_738E86A5C413AAF9C9F86DD30FBA6959" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_BusinessAcquistionProFormaResultsTableTextBlock" xlink:label="loc_jll_BusinessAcquistionProFormaResultsTableTextBlock_2F10AE793B50675BA6DE6DD30FBAEA2A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_BusinessAcquistionProFormaResultsLineItems_B88497CD05165EE17AEE6DD30FBA507C" xlink:to="loc_jll_BusinessAcquistionProFormaResultsTableTextBlock_2F10AE793B50675BA6DE6DD30FBAEA2A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessSegments" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingAssetReconcilingItemLineItems" xlink:label="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_8708CFFBD76D4191D65C6DD30FACBB64" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_516B127B4660A17940BF6DD30FAC6DC1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_8708CFFBD76D4191D65C6DD30FACBB64" xlink:to="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_516B127B4660A17940BF6DD30FAC6DC1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_EB86F1789CC7E4E8E0C36DD30FACEC0A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_516B127B4660A17940BF6DD30FAC6DC1" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_EB86F1789CC7E4E8E0C36DD30FACEC0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_0E1635C16CFA06DD23416DD30FAC7BB8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_EB86F1789CC7E4E8E0C36DD30FACEC0A" xlink:to="loc_us-gaap_SegmentDomain_0E1635C16CFA06DD23416DD30FAC7BB8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_0E1635C16CFA06DD23416DD30FAC7BB8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_EB86F1789CC7E4E8E0C36DD30FACEC0A" xlink:to="loc_us-gaap_SegmentDomain_0E1635C16CFA06DD23416DD30FAC7BB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReportableSubsegmentsMember" xlink:label="loc_us-gaap_ReportableSubsegmentsMember_0556D8C38F3A68C3B0476DD30FACF71F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0E1635C16CFA06DD23416DD30FAC7BB8" xlink:to="loc_us-gaap_ReportableSubsegmentsMember_0556D8C38F3A68C3B0476DD30FACF71F" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_InvestmentManagementMember" xlink:label="loc_jll_InvestmentManagementMember_D525C0F05E3798FF50AD6DD30FACC8BB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0E1635C16CFA06DD23416DD30FAC7BB8" xlink:to="loc_jll_InvestmentManagementMember_D525C0F05E3798FF50AD6DD30FACC8BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaterialReconcilingItemsMember" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_7866E15BB3E2E577E4536DD30FACC7B9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0E1635C16CFA06DD23416DD30FAC7BB8" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_7866E15BB3E2E577E4536DD30FACC7B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_5C557ECD575468D010C66DD30FAC85BC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTable_516B127B4660A17940BF6DD30FAC6DC1" xlink:to="loc_us-gaap_StatementGeographicalAxis_5C557ECD575468D010C66DD30FAC85BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_0CBF0A6900A4A2048E466DD30FAC6670_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_5C557ECD575468D010C66DD30FAC85BC" xlink:to="loc_us-gaap_SegmentGeographicalDomain_0CBF0A6900A4A2048E466DD30FAC6670_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_0CBF0A6900A4A2048E466DD30FAC6670" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_5C557ECD575468D010C66DD30FAC85BC" xlink:to="loc_us-gaap_SegmentGeographicalDomain_0CBF0A6900A4A2048E466DD30FAC6670" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmericasMember" xlink:label="loc_us-gaap_AmericasMember_7FB8D336BCE1617231B86DD30FAC872D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_0CBF0A6900A4A2048E466DD30FAC6670" xlink:to="loc_us-gaap_AmericasMember_7FB8D336BCE1617231B86DD30FAC872D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EMEAMember" xlink:label="loc_us-gaap_EMEAMember_C017C4CA98A6F806C7DF6DD30FAC8B34" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_0CBF0A6900A4A2048E466DD30FAC6670" xlink:to="loc_us-gaap_EMEAMember_C017C4CA98A6F806C7DF6DD30FAC8B34" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_2E5BA8D91BBAF02978AA6DD30FAC6292" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_0CBF0A6900A4A2048E466DD30FAC6670" xlink:to="loc_us-gaap_AsiaPacificMember_2E5BA8D91BBAF02978AA6DD30FAC6292" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_826CC87E15237ECB966D6DD30FAC08E9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_8708CFFBD76D4191D65C6DD30FACBB64" xlink:to="loc_us-gaap_Assets_826CC87E15237ECB966D6DD30FAC08E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_21A6BE4D79757865B37E6DD30FAC80F3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingAssetReconcilingItemLineItems_8708CFFBD76D4191D65C6DD30FACBB64" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_21A6BE4D79757865B37E6DD30FAC80F3" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsCurrenciesDetails" xlink:type="extended">
    <link:loc xlink:href="jll-20161231.xsd#jll_ScheduleOfSignificantCurrenciesLineItems" xlink:label="loc_jll_ScheduleOfSignificantCurrenciesLineItems_EBF423E4F9ED37B7CEC062CE5501B4F3" xlink:type="locator" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ScheduleOfSignificantCurrenciesTable" xlink:label="loc_jll_ScheduleOfSignificantCurrenciesTable_173F7CB3CCB6EC9C70D262CE5500F11D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jll_ScheduleOfSignificantCurrenciesLineItems_EBF423E4F9ED37B7CEC062CE5501B4F3" xlink:to="loc_jll_ScheduleOfSignificantCurrenciesTable_173F7CB3CCB6EC9C70D262CE5500F11D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="jll-20161231.xsd#jll_SignificantCurrenciesTypeAxis" xlink:label="loc_jll_SignificantCurrenciesTypeAxis_75155EF5F766A433C1EC62CE5500F958" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jll_ScheduleOfSignificantCurrenciesTable_173F7CB3CCB6EC9C70D262CE5500F11D" xlink:to="loc_jll_SignificantCurrenciesTypeAxis_75155EF5F766A433C1EC62CE5500F958" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_SignificantCurrenciesTypeDomain" xlink:label="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_SignificantCurrenciesTypeAxis_75155EF5F766A433C1EC62CE5500F958" xlink:to="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_SignificantCurrenciesTypeDomain" xlink:label="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_SignificantCurrenciesTypeAxis_75155EF5F766A433C1EC62CE5500F958" xlink:to="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd#currency_USD" xlink:label="loc_currency_USD_68D62C260C998B01392162CE55003D5E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_currency_USD_68D62C260C998B01392162CE55003D5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd#currency_GBP" xlink:label="loc_currency_GBP_BBE3C5E8C29BF1658E2B62CE5500BB92" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_currency_GBP_BBE3C5E8C29BF1658E2B62CE5500BB92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd#currency_EUR" xlink:label="loc_currency_EUR_659AB1355840C14198D262CE55017980" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_currency_EUR_659AB1355840C14198D262CE55017980" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd#currency_AUD" xlink:label="loc_currency_AUD_90B4970CFF413691F2C262CE550131DF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_currency_AUD_90B4970CFF413691F2C262CE550131DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd#currency_HKD" xlink:label="loc_currency_HKD_AA1237F4B93990897D0162CE55011DF7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_currency_HKD_AA1237F4B93990897D0162CE55011DF7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd#currency_INR" xlink:label="loc_currency_INR_864C895E2578F204CD6162CE5501FE03" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_currency_INR_864C895E2578F204CD6162CE5501FE03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd#currency_JPY" xlink:label="loc_currency_JPY_8FDB3A41735AAF19900562CE5501193B" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_currency_JPY_8FDB3A41735AAF19900562CE5501193B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd#currency_CNY" xlink:label="loc_currency_CNY_0C815CEB44223E84FBBC62CE55011092" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_currency_CNY_0C815CEB44223E84FBBC62CE55011092" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd#currency_SGD" xlink:label="loc_currency_SGD_79EDBB7AC17A61E1AAB162CE5501D22F" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_currency_SGD_79EDBB7AC17A61E1AAB162CE5501D22F" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_OtherCurrenciesMember" xlink:label="loc_jll_OtherCurrenciesMember_E60F6A4299D06FF2F72862CE5501379D" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SignificantCurrenciesTypeDomain_01830D7F620A7B1B37A662CE55002E44" xlink:to="loc_jll_OtherCurrenciesMember_E60F6A4299D06FF2F72862CE5501379D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_6B220E8BA4CF4FC9CCC762CE5501EF67" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfSignificantCurrenciesLineItems_EBF423E4F9ED37B7CEC062CE5501B4F3" xlink:to="loc_us-gaap_Revenues_6B220E8BA4CF4FC9CCC762CE5501EF67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_C297B5AD4140872FF7E162CE55011691" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ScheduleOfSignificantCurrenciesLineItems_EBF423E4F9ED37B7CEC062CE5501B4F3" xlink:to="loc_us-gaap_Assets_C297B5AD4140872FF7E162CE55011691" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_C075EACC7ECA27CC6FB467D0A3580E72" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7480DDF276E743AFC2B067D0A35784ED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_C075EACC7ECA27CC6FB467D0A3580E72" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7480DDF276E743AFC2B067D0A35784ED" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_216C1E26E23D90E2D85B67D0A357BAF2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7480DDF276E743AFC2B067D0A35784ED" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_216C1E26E23D90E2D85B67D0A357BAF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_B6D0280B3714934766CC67D0A3570D88_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_216C1E26E23D90E2D85B67D0A357BAF2" xlink:to="loc_us-gaap_SegmentDomain_B6D0280B3714934766CC67D0A3570D88_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_B6D0280B3714934766CC67D0A3570D88" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_216C1E26E23D90E2D85B67D0A357BAF2" xlink:to="loc_us-gaap_SegmentDomain_B6D0280B3714934766CC67D0A3570D88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReportableSubsegmentsMember" xlink:label="loc_us-gaap_ReportableSubsegmentsMember_EF44BA71F72751819AAA67D0A358765F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_B6D0280B3714934766CC67D0A3570D88" xlink:to="loc_us-gaap_ReportableSubsegmentsMember_EF44BA71F72751819AAA67D0A358765F" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_InvestmentManagementMember" xlink:label="loc_jll_InvestmentManagementMember_1DC36204BD9F4F91D70167D0A3583CBA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_B6D0280B3714934766CC67D0A3570D88" xlink:to="loc_jll_InvestmentManagementMember_1DC36204BD9F4F91D70167D0A3583CBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_7BC82C9092131CA9BB5C67D0A3584F4D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7480DDF276E743AFC2B067D0A35784ED" xlink:to="loc_us-gaap_StatementGeographicalAxis_7BC82C9092131CA9BB5C67D0A3584F4D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_FACF559F75BF9C1A6ABD67D0A35859F7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_7BC82C9092131CA9BB5C67D0A3584F4D" xlink:to="loc_us-gaap_SegmentGeographicalDomain_FACF559F75BF9C1A6ABD67D0A35859F7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_FACF559F75BF9C1A6ABD67D0A35859F7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_7BC82C9092131CA9BB5C67D0A3584F4D" xlink:to="loc_us-gaap_SegmentGeographicalDomain_FACF559F75BF9C1A6ABD67D0A35859F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmericasMember" xlink:label="loc_us-gaap_AmericasMember_B668D7E9F7473F8E687867D0A35853A8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_FACF559F75BF9C1A6ABD67D0A35859F7" xlink:to="loc_us-gaap_AmericasMember_B668D7E9F7473F8E687867D0A35853A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EMEAMember" xlink:label="loc_us-gaap_EMEAMember_CB37E044506A884D860167D0A3589970" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_FACF559F75BF9C1A6ABD67D0A35859F7" xlink:to="loc_us-gaap_EMEAMember_CB37E044506A884D860167D0A3589970" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_6786CF710A307C0B3CB767D0A3581C50" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_FACF559F75BF9C1A6ABD67D0A35859F7" xlink:to="loc_us-gaap_AsiaPacificMember_6786CF710A307C0B3CB767D0A3581C50" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LasalleInvestmentManagementMember" xlink:label="loc_jll_LasalleInvestmentManagementMember_7E630C3707BA3997942067D0A358CD0C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_FACF559F75BF9C1A6ABD67D0A35859F7" xlink:to="loc_jll_LasalleInvestmentManagementMember_7E630C3707BA3997942067D0A358CD0C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_7A90E76BDE48E618B11A67D0A35882CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_C075EACC7ECA27CC6FB467D0A3580E72" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_7A90E76BDE48E618B11A67D0A35882CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingInformationRevenueAbstract" xlink:label="loc_us-gaap_SegmentReportingInformationRevenueAbstract_F6683D868F77E8C313B967D0A359BFCA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_C075EACC7ECA27CC6FB467D0A3580E72" xlink:to="loc_us-gaap_SegmentReportingInformationRevenueAbstract_F6683D868F77E8C313B967D0A359BFCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_C4C6546D3B93A29E1EE467D0A3597AB3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationRevenueAbstract_F6683D868F77E8C313B967D0A359BFCA" xlink:to="loc_us-gaap_Revenues_C4C6546D3B93A29E1EE467D0A3597AB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GeneralContractorCosts" xlink:label="loc_us-gaap_GeneralContractorCosts_3E46BE76FA4A98DA2C8E67D0A359AE3E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationRevenueAbstract_F6683D868F77E8C313B967D0A359BFCA" xlink:to="loc_us-gaap_GeneralContractorCosts_3E46BE76FA4A98DA2C8E67D0A359AE3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_692CEAB0AE54770DE06867D0A3592576" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationRevenueAbstract_F6683D868F77E8C313B967D0A359BFCA" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_692CEAB0AE54770DE06867D0A3592576" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RealEstateRevenueNet" xlink:label="loc_us-gaap_RealEstateRevenueNet_A4CAFD4941A2B0615C5C67D0A3599F2C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationRevenueAbstract_F6683D868F77E8C313B967D0A359BFCA" xlink:to="loc_us-gaap_RealEstateRevenueNet_A4CAFD4941A2B0615C5C67D0A3599F2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_364CA39353B63F62761067D0A3596DBE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_C075EACC7ECA27CC6FB467D0A3580E72" xlink:to="loc_us-gaap_OperatingExpensesAbstract_364CA39353B63F62761067D0A3596DBE" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_CompensationOperatingAndAdministrativeExpenses" xlink:label="loc_jll_CompensationOperatingAndAdministrativeExpenses_11BFBFF743A7094ACBD567D0A3596290" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_364CA39353B63F62761067D0A3596DBE" xlink:to="loc_jll_CompensationOperatingAndAdministrativeExpenses_11BFBFF743A7094ACBD567D0A3596290" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_C529F6A306B979EA875567D0A359050D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_364CA39353B63F62761067D0A3596DBE" xlink:to="loc_us-gaap_DepreciationAndAmortization_C529F6A306B979EA875567D0A359050D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_69479C2720E9B07745C667D0A3598062" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_364CA39353B63F62761067D0A3596DBE" xlink:to="loc_us-gaap_OperatingExpenses_69479C2720E9B07745C667D0A3598062" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_GrossContractVendorAndSubcontractorCostsReimbursement" xlink:label="loc_jll_GrossContractVendorAndSubcontractorCostsReimbursement_37E7E0F34EDF3376D90A67D0A359300B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_364CA39353B63F62761067D0A3596DBE" xlink:to="loc_jll_GrossContractVendorAndSubcontractorCostsReimbursement_37E7E0F34EDF3376D90A67D0A359300B" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_NetSegmentOperatingExpenses" xlink:label="loc_jll_NetSegmentOperatingExpenses_CB6F61321393A8435D2F67D0A35BC161" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_364CA39353B63F62761067D0A3596DBE" xlink:to="loc_jll_NetSegmentOperatingExpenses_CB6F61321393A8435D2F67D0A35BC161" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_41C4945E7F5AC7C1185D67D0A35BD427" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_C075EACC7ECA27CC6FB467D0A3580E72" xlink:to="loc_us-gaap_OperatingIncomeLoss_41C4945E7F5AC7C1185D67D0A35BD427" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_F71F1C64E4A781DF9D3867D0A35B6D08" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_C075EACC7ECA27CC6FB467D0A3580E72" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_F71F1C64E4A781DF9D3867D0A35B6D08" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_OperatingIncomeLossIncludingIncomeLossfromEquityMethodInvestments" xlink:label="loc_jll_OperatingIncomeLossIncludingIncomeLossfromEquityMethodInvestments_A0099BE01830C9C0668C67D0A35B5BD9" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_C075EACC7ECA27CC6FB467D0A3580E72" xlink:to="loc_jll_OperatingIncomeLossIncludingIncomeLossfromEquityMethodInvestments_A0099BE01830C9C0668C67D0A35B5BD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract" xlink:label="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_0E60BA33ECDFE7D6FA5D67D0A35B9E82" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_C075EACC7ECA27CC6FB467D0A3580E72" xlink:to="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_0E60BA33ECDFE7D6FA5D67D0A35B9E82" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_SegmentReportingInformationOperatingExpenses" xlink:label="loc_jll_SegmentReportingInformationOperatingExpenses_5C202BE153EC256A17C167D0A35C1B09" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_0E60BA33ECDFE7D6FA5D67D0A35B9E82" xlink:to="loc_jll_SegmentReportingInformationOperatingExpenses_5C202BE153EC256A17C167D0A35C1B09" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_SegmentReportingInformationOperatingIncomeBeforeRestructuringCharges" xlink:label="loc_jll_SegmentReportingInformationOperatingIncomeBeforeRestructuringCharges_1EAC093E48571BA12ADE67D0A35C85F0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_0E60BA33ECDFE7D6FA5D67D0A35B9E82" xlink:to="loc_jll_SegmentReportingInformationOperatingIncomeBeforeRestructuringCharges_1EAC093E48571BA12ADE67D0A35C85F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCostsAndAssetImpairmentCharges" xlink:label="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_B0696AF8D68E2013019767D0A35C874B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_0E60BA33ECDFE7D6FA5D67D0A35B9E82" xlink:to="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_B0696AF8D68E2013019767D0A35C874B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsPropertyAndEquipmentExpendituresDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingOtherSignificantReconcilingItemLineItems" xlink:label="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemLineItems_2B328F6451193088D0D45D2F97249D0F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReconciliationOfOtherSignificantReconcilingItemsFromSegmentsToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfOtherSignificantReconcilingItemsFromSegmentsToConsolidatedTable_83F165292445A936C2DC5D2F971E7A35" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemLineItems_2B328F6451193088D0D45D2F97249D0F" xlink:to="loc_us-gaap_ReconciliationOfOtherSignificantReconcilingItemsFromSegmentsToConsolidatedTable_83F165292445A936C2DC5D2F971E7A35" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_AAE35E4965661A66D55C5D2F9723026E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfOtherSignificantReconcilingItemsFromSegmentsToConsolidatedTable_83F165292445A936C2DC5D2F971E7A35" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_AAE35E4965661A66D55C5D2F9723026E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C082165433111E72B3CB5D2F9723E2E2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_AAE35E4965661A66D55C5D2F9723026E" xlink:to="loc_us-gaap_SegmentDomain_C082165433111E72B3CB5D2F9723E2E2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C082165433111E72B3CB5D2F9723E2E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_AAE35E4965661A66D55C5D2F9723026E" xlink:to="loc_us-gaap_SegmentDomain_C082165433111E72B3CB5D2F9723E2E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReportableSubsegmentsMember" xlink:label="loc_us-gaap_ReportableSubsegmentsMember_C94FD3E524A7279509105D2F97230878" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C082165433111E72B3CB5D2F9723E2E2" xlink:to="loc_us-gaap_ReportableSubsegmentsMember_C94FD3E524A7279509105D2F97230878" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_InvestmentManagementMember" xlink:label="loc_jll_InvestmentManagementMember_1415C5AEE624CB3FE6FC5D2F97230B44" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C082165433111E72B3CB5D2F9723E2E2" xlink:to="loc_jll_InvestmentManagementMember_1415C5AEE624CB3FE6FC5D2F97230B44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaterialReconcilingItemsMember" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_DE972AB4915035CDC5035D2F972383BB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C082165433111E72B3CB5D2F9723E2E2" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_DE972AB4915035CDC5035D2F972383BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_EF7BCC5AAE05601D04055D2F9723EFFF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfOtherSignificantReconcilingItemsFromSegmentsToConsolidatedTable_83F165292445A936C2DC5D2F971E7A35" xlink:to="loc_us-gaap_StatementGeographicalAxis_EF7BCC5AAE05601D04055D2F9723EFFF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_CB01803DFC63BF20AAA65D2F972353B3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_EF7BCC5AAE05601D04055D2F9723EFFF" xlink:to="loc_us-gaap_SegmentGeographicalDomain_CB01803DFC63BF20AAA65D2F972353B3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_CB01803DFC63BF20AAA65D2F972353B3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_EF7BCC5AAE05601D04055D2F9723EFFF" xlink:to="loc_us-gaap_SegmentGeographicalDomain_CB01803DFC63BF20AAA65D2F972353B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmericasMember" xlink:label="loc_us-gaap_AmericasMember_33179EB8CAC84E793E3E5D2F9724C9FC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_CB01803DFC63BF20AAA65D2F972353B3" xlink:to="loc_us-gaap_AmericasMember_33179EB8CAC84E793E3E5D2F9724C9FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EMEAMember" xlink:label="loc_us-gaap_EMEAMember_1F34A9842345384D52D95D2F97248DFE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_CB01803DFC63BF20AAA65D2F972353B3" xlink:to="loc_us-gaap_EMEAMember_1F34A9842345384D52D95D2F97248DFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_30624E634592FD1451B15D2F9724B636" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_CB01803DFC63BF20AAA65D2F972353B3" xlink:to="loc_us-gaap_AsiaPacificMember_30624E634592FD1451B15D2F9724B636" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract" xlink:label="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_11616B8A3D38D378E48B5D2F9724107A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemLineItems_2B328F6451193088D0D45D2F97249D0F" xlink:to="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_11616B8A3D38D378E48B5D2F9724107A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_24F73630BFA9E627EFCB5D2F9725DB4E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_11616B8A3D38D378E48B5D2F9724107A" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_24F73630BFA9E627EFCB5D2F9725DB4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAdditions" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAdditions_1A9EB57D6812DBE3A34E5D2F972531FF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_11616B8A3D38D378E48B5D2F9724107A" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAdditions_1A9EB57D6812DBE3A34E5D2F972531FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_23FEA36EA63248B483915D2F9725129D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemConsolidatedAbstract_11616B8A3D38D378E48B5D2F9724107A" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_23FEA36EA63248B483915D2F9725129D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForProceedsFromProductiveAssets" xlink:label="loc_us-gaap_PaymentsForProceedsFromProductiveAssets_CDB60FE3299D0A3445535D2F9726D9F5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingOtherSignificantReconcilingItemLineItems_2B328F6451193088D0D45D2F97249D0F" xlink:to="loc_us-gaap_PaymentsForProceedsFromProductiveAssets_CDB60FE3299D0A3445535D2F9726D9F5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/BusinessSegmentsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/CommitmentsAndContingenciesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesLineItems" xlink:label="loc_us-gaap_LossContingenciesLineItems_D1BC64B6BA1FC66E63BC63BAA5069463" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesTable" xlink:label="loc_us-gaap_LossContingenciesTable_379D5088D7A031E9FE3463BAA5069078" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_D1BC64B6BA1FC66E63BC63BAA5069463" xlink:to="loc_us-gaap_LossContingenciesTable_379D5088D7A031E9FE3463BAA5069078" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_CFAB405CB44B4B86D06663BAA5061BA0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_379D5088D7A031E9FE3463BAA5069078" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_CFAB405CB44B4B86D06663BAA5061BA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_C9CE5D590BD2E0DB740E63BAA506259A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_CFAB405CB44B4B86D06663BAA5061BA0" xlink:to="loc_us-gaap_LossContingencyNatureDomain_C9CE5D590BD2E0DB740E63BAA506259A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_C9CE5D590BD2E0DB740E63BAA506259A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_CFAB405CB44B4B86D06663BAA5061BA0" xlink:to="loc_us-gaap_LossContingencyNatureDomain_C9CE5D590BD2E0DB740E63BAA506259A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LitigationStatusAxis" xlink:label="loc_us-gaap_LitigationStatusAxis_2E9A8E25A5A7E8F87AF263BAA506A183" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_379D5088D7A031E9FE3463BAA5069078" xlink:to="loc_us-gaap_LitigationStatusAxis_2E9A8E25A5A7E8F87AF263BAA506A183" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LitigationStatusDomain" xlink:label="loc_us-gaap_LitigationStatusDomain_FF8246299FA703F0C2F763BAA506DFFE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationStatusAxis_2E9A8E25A5A7E8F87AF263BAA506A183" xlink:to="loc_us-gaap_LitigationStatusDomain_FF8246299FA703F0C2F763BAA506DFFE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LitigationStatusDomain" xlink:label="loc_us-gaap_LitigationStatusDomain_FF8246299FA703F0C2F763BAA506DFFE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationStatusAxis_2E9A8E25A5A7E8F87AF263BAA506A183" xlink:to="loc_us-gaap_LitigationStatusDomain_FF8246299FA703F0C2F763BAA506DFFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LitigationCaseAxis" xlink:label="loc_us-gaap_LitigationCaseAxis_39AB199882A0C5939DA963BAA506D5C2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_379D5088D7A031E9FE3463BAA5069078" xlink:to="loc_us-gaap_LitigationCaseAxis_39AB199882A0C5939DA963BAA506D5C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="loc_us-gaap_LitigationCaseTypeDomain_F1671114220389BEFFBB63BAA5067AC8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationCaseAxis_39AB199882A0C5939DA963BAA506D5C2" xlink:to="loc_us-gaap_LitigationCaseTypeDomain_F1671114220389BEFFBB63BAA5067AC8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="loc_us-gaap_LitigationCaseTypeDomain_F1671114220389BEFFBB63BAA5067AC8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationCaseAxis_39AB199882A0C5939DA963BAA506D5C2" xlink:to="loc_us-gaap_LitigationCaseTypeDomain_F1671114220389BEFFBB63BAA5067AC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyReceivable" xlink:label="loc_us-gaap_LossContingencyReceivable_D05C0C6D4C2F2480AC0D63BAA5065306" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D1BC64B6BA1FC66E63BC63BAA5069463" xlink:to="loc_us-gaap_LossContingencyReceivable_D05C0C6D4C2F2480AC0D63BAA5065306" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyAccrualProvision" xlink:label="loc_us-gaap_LossContingencyAccrualProvision_22733DF08D97C88BDD6F63BAA50613B6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D1BC64B6BA1FC66E63BC63BAA5069463" xlink:to="loc_us-gaap_LossContingencyAccrualProvision_22733DF08D97C88BDD6F63BAA50613B6" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LossContingencyAccrualProvisionAdjustment" xlink:label="loc_jll_LossContingencyAccrualProvisionAdjustment_B67426704EBC360FEDC663BAA50659AD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D1BC64B6BA1FC66E63BC63BAA5069463" xlink:to="loc_jll_LossContingencyAccrualProvisionAdjustment_B67426704EBC360FEDC663BAA50659AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyAccrualPayments" xlink:label="loc_us-gaap_LossContingencyAccrualPayments_606BF51A0E2BDCF13D4D63BAA5068D60" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D1BC64B6BA1FC66E63BC63BAA5069463" xlink:to="loc_us-gaap_LossContingencyAccrualPayments_606BF51A0E2BDCF13D4D63BAA5068D60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyAccrualAtCarryingValue" xlink:label="loc_us-gaap_LossContingencyAccrualAtCarryingValue_B84A58F4E564057C85BF63DDB3F5BBE6" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D1BC64B6BA1FC66E63BC63BAA5069463" xlink:to="loc_us-gaap_LossContingencyAccrualAtCarryingValue_B84A58F4E564057C85BF63DDB3F5BBE6" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_Loansubjecttolosssharingarrangementsaggregateunpaidprincipalamount" xlink:label="loc_jll_Loansubjecttolosssharingarrangementsaggregateunpaidprincipalamount_8BA8427F04978FF3BB9963C7F79C15DE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D1BC64B6BA1FC66E63BC63BAA5069463" xlink:to="loc_jll_Loansubjecttolosssharingarrangementsaggregateunpaidprincipalamount_8BA8427F04978FF3BB9963C7F79C15DE" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_Loanlossaccrual" xlink:label="loc_jll_Loanlossaccrual_C05165F221607889D98063DA6300DD7C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_D1BC64B6BA1FC66E63BC63BAA5069463" xlink:to="loc_jll_Loanlossaccrual_C05165F221607889D98063DA6300DD7C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/ConsolidatedBalanceSheets" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/ConsolidatedStatementOfChangeInEquity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_EDE94419E79B5405EE2162804505D888" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_22AEBF22F59FCBBDE585628045048C42" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_EDE94419E79B5405EE2162804505D888" xlink:to="loc_us-gaap_StatementTable_22AEBF22F59FCBBDE585628045048C42" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_3CBB72379D4BDD9FB0F06280450475E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_22AEBF22F59FCBBDE585628045048C42" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_3CBB72379D4BDD9FB0F06280450475E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3CBB72379D4BDD9FB0F06280450475E2" xlink:to="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3CBB72379D4BDD9FB0F06280450475E2" xlink:to="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_D57E653FD78095BB21F8628045041D09" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67" xlink:to="loc_us-gaap_CommonStockMember_D57E653FD78095BB21F8628045041D09" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_BA4FF916B0754346125B6280450435CD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_BA4FF916B0754346125B6280450435CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_37B2CEFB12A8B13BDF106280450494B4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67" xlink:to="loc_us-gaap_RetainedEarningsMember_37B2CEFB12A8B13BDF106280450494B4" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_SharesHeldInTrustMember" xlink:label="loc_jll_SharesHeldInTrustMember_8345956344A3A2939002628045049AF8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67" xlink:to="loc_jll_SharesHeldInTrustMember_8345956344A3A2939002628045049AF8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_582C4E63F0F5DB684E55628045046C5C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_582C4E63F0F5DB684E55628045046C5C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_C2479CC49BF236B9093E62804505391A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_AF9E6B899CA33DBADB6E62804504CD67" xlink:to="loc_us-gaap_NoncontrollingInterestMember_C2479CC49BF236B9093E62804505391A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_928879E8812B13D513A0628045058CF3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_EDE94419E79B5405EE2162804505D888" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_928879E8812B13D513A0628045058CF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_EDE94419E79B5405EE2162804505D888" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_74104EDBBE7182BB4B406280450A5EF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_SharesOutstanding_74104EDBBE7182BB4B406280450A5EF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_DE7DC439BF5B00D596686280450AF677" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_DE7DC439BF5B00D596686280450AF677" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest" xlink:label="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_8E6FF221F83111FDC0DA6280450BC6DA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_8E6FF221F83111FDC0DA6280450BC6DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_729B1DF7543463386A776280450B0AF0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_729B1DF7543463386A776280450B0AF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_AB405A946AFE02079E356280450B3A63" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_AB405A946AFE02079E356280450B3A63" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_C00FABDC4829AD4D671B6280450B5C44" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_C00FABDC4829AD4D671B6280450B5C44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_24D69C6BA2FA6E8C6EE56280450BB1E0" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_24D69C6BA2FA6E8C6EE56280450BB1E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet" xlink:label="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_3F12C9E71BBC945D91F06280450BA606" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_3F12C9E71BBC945D91F06280450BA606" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_9385575D639D05AD54046280450BCE61" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_9385575D639D05AD54046280450BCE61" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_IncreaseDecreaseInCommonStockHeldInTrust" xlink:label="loc_jll_IncreaseDecreaseInCommonStockHeldInTrust_8F497D55B81A4FEBFE386280450B916E" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_jll_IncreaseDecreaseInCommonStockHeldInTrust_8F497D55B81A4FEBFE386280450B916E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="loc_us-gaap_DividendsCommonStockCash_BA9A428BD358C838524C6280450BD9DA" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_DividendsCommonStockCash_BA9A428BD358C838524C6280450BD9DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_D56783F01F0E7E8142406280450B30DB" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_D56783F01F0E7E8142406280450B30DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_179C53B8BCF3BEFB3BB76280450B115F" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_179C53B8BCF3BEFB3BB76280450B115F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinorityInterestPeriodIncreaseDecrease" xlink:label="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_2D7E674F4F689C358D586280450BEE36" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_2D7E674F4F689C358D586280450BEE36" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_6D92D7359B6330C262296280450B8335" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_3AAC6DF5C988F34C39E462804505C25C" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_6D92D7359B6330C262296280450B8335" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RedeemableNoncontrollingInterestEquityRedemptionValue" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityRedemptionValue_80392A67B936D6BCF4C16280450CB897" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_EDE94419E79B5405EE2162804505D888" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityRedemptionValue_80392A67B936D6BCF4C16280450CB897" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/ConsolidatedStatementOfChangeInEquityParenthetical" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/Debt" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/DebtDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_2FE045C28FC4AC0D33375D874941E14F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_2FE045C28FC4AC0D33375D874941E14F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShortTermDebtTypeAxis" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_CA52D6F05D588D5AA26C5D87494200D8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_2FE045C28FC4AC0D33375D874941E14F" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_CA52D6F05D588D5AA26C5D87494200D8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_27B9A13EDF9AB7F6B7C05D87494297BC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_CA52D6F05D588D5AA26C5D87494200D8" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_27B9A13EDF9AB7F6B7C05D87494297BC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShortTermDebtTypeDomain" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_27B9A13EDF9AB7F6B7C05D87494297BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_CA52D6F05D588D5AA26C5D87494200D8" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_27B9A13EDF9AB7F6B7C05D87494297BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_50F1DDD7E0D3470621A85D874942ECEA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_2FE045C28FC4AC0D33375D874941E14F" xlink:to="loc_us-gaap_CreditFacilityAxis_50F1DDD7E0D3470621A85D874942ECEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_DC1A6BEB64D0F886FDB85D874942CFC6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_50F1DDD7E0D3470621A85D874942ECEA" xlink:to="loc_us-gaap_CreditFacilityDomain_DC1A6BEB64D0F886FDB85D874942CFC6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_DC1A6BEB64D0F886FDB85D874942CFC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_50F1DDD7E0D3470621A85D874942ECEA" xlink:to="loc_us-gaap_CreditFacilityDomain_DC1A6BEB64D0F886FDB85D874942CFC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_3DF2D18207CF584323DE5D8749423CB8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_DC1A6BEB64D0F886FDB85D874942CFC6" xlink:to="loc_us-gaap_LineOfCreditMember_3DF2D18207CF584323DE5D8749423CB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_8A98359B204843C57CAE5D874942A9E5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_2FE045C28FC4AC0D33375D874941E14F" xlink:to="loc_us-gaap_RangeAxis_8A98359B204843C57CAE5D874942A9E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_AFA3216C8D3CDDA4D80F5D874942B712_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_8A98359B204843C57CAE5D874942A9E5" xlink:to="loc_us-gaap_RangeMember_AFA3216C8D3CDDA4D80F5D874942B712_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_AFA3216C8D3CDDA4D80F5D874942B712" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_8A98359B204843C57CAE5D874942A9E5" xlink:to="loc_us-gaap_RangeMember_AFA3216C8D3CDDA4D80F5D874942B712" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_4D28664F05C88006E73B5D87494203A0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_AFA3216C8D3CDDA4D80F5D874942B712" xlink:to="loc_us-gaap_MinimumMember_4D28664F05C88006E73B5D87494203A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_5EE26AA2FD6F50618D525D8749428B87" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_AFA3216C8D3CDDA4D80F5D874942B712" xlink:to="loc_us-gaap_MaximumMember_5EE26AA2FD6F50618D525D8749428B87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_6708671A0E20B9C554B45D874942D0AA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_2FE045C28FC4AC0D33375D874941E14F" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_6708671A0E20B9C554B45D874942D0AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_5883861550F83673D99F5D8749420AD9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6708671A0E20B9C554B45D874942D0AA" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_5883861550F83673D99F5D8749420AD9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_5883861550F83673D99F5D8749420AD9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6708671A0E20B9C554B45D874942D0AA" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_5883861550F83673D99F5D8749420AD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SeniorNotesMember" xlink:label="loc_us-gaap_SeniorNotesMember_BD7220685656F68B0E345D8749421132" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_5883861550F83673D99F5D8749420AD9" xlink:to="loc_us-gaap_SeniorNotesMember_BD7220685656F68B0E345D8749421132" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineOfCreditFacilityByTypeAxis" xlink:label="loc_jll_LineOfCreditFacilityByTypeAxis_35F589A92F0FBDAE44A35D874943177D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_2FE045C28FC4AC0D33375D874941E14F" xlink:to="loc_jll_LineOfCreditFacilityByTypeAxis_35F589A92F0FBDAE44A35D874943177D" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineOfCreditFacilityByTypeDomain" xlink:label="loc_jll_LineOfCreditFacilityByTypeDomain_50E8F62B215E2C0030D25D8749434F14_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_LineOfCreditFacilityByTypeAxis_35F589A92F0FBDAE44A35D874943177D" xlink:to="loc_jll_LineOfCreditFacilityByTypeDomain_50E8F62B215E2C0030D25D8749434F14_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineOfCreditFacilityByTypeDomain" xlink:label="loc_jll_LineOfCreditFacilityByTypeDomain_50E8F62B215E2C0030D25D8749434F14" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_LineOfCreditFacilityByTypeAxis_35F589A92F0FBDAE44A35D874943177D" xlink:to="loc_jll_LineOfCreditFacilityByTypeDomain_50E8F62B215E2C0030D25D8749434F14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_529C9B97F1A60EC8CE6A5D8749435143" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_50E8F62B215E2C0030D25D8749434F14" xlink:to="loc_us-gaap_LineOfCreditMember_529C9B97F1A60EC8CE6A5D8749435143" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_799FFEC04DBCB5ABFDE05D874943EDDC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_799FFEC04DBCB5ABFDE05D874943EDDC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDescription" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateDescription_1926F487A35CE95F93525D8749437882" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateDescription_1926F487A35CE95F93525D8749437882" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:label="loc_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_2077FADB66E9224DB8FD5D8749436F7D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_2077FADB66E9224DB8FD5D8749436F7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5FABBCEB3DECFEFE1CD75D87494374BC" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5FABBCEB3DECFEFE1CD75D87494374BC" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_CovenantTermsMinimumLeverageRatioThroughSpecifiedDate" xlink:label="loc_jll_CovenantTermsMinimumLeverageRatioThroughSpecifiedDate_F869D0C245D6F43778E15D8749432165" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_jll_CovenantTermsMinimumLeverageRatioThroughSpecifiedDate_F869D0C245D6F43778E15D8749432165" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_CovenantTermsMinimumLeverageRatioThroughSpecifiedDateFollowingaMaterialAcquisition" xlink:label="loc_jll_CovenantTermsMinimumLeverageRatioThroughSpecifiedDateFollowingaMaterialAcquisition_A6D4876F11E6FAC4E7FC5D8749436E7A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_jll_CovenantTermsMinimumLeverageRatioThroughSpecifiedDateFollowingaMaterialAcquisition_A6D4876F11E6FAC4E7FC5D8749436E7A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:label="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_8A0DE58A308CE72CCA875D8749439013" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_8A0DE58A308CE72CCA875D8749439013" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_8E78DDFF350881F8B0C45D8749439848" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_8E78DDFF350881F8B0C45D8749439848" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDuringPeriod" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_DF088C27BAA5386DFCE95D874943A6E8" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_DF088C27BAA5386DFCE95D874943A6E8" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_CovenantTermsMinimumCashInterestCoverageRatio" xlink:label="loc_jll_CovenantTermsMinimumCashInterestCoverageRatio_F23AD1A9515C91BF3A435D874944F34F" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_jll_CovenantTermsMinimumCashInterestCoverageRatio_F23AD1A9515C91BF3A435D874944F34F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_3279F6D11DF1957DD89A5D874944BFD7" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_3279F6D11DF1957DD89A5D874944BFD7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_3631B0302CAB0E0259245D87494490A2" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_3631B0302CAB0E0259245D87494490A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_8B0213DCD35BC1A01ED05D8749447A56" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_8B0213DCD35BC1A01ED05D8749447A56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_BF961BF70A7C1BF4FE035D8749444AEB" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_2C9B325775754118593C5D874943863C" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_BF961BF70A7C1BF4FE035D8749444AEB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/DebtScheduleOfLongTermDebtInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_337C5656AF76685CF8E15C8E36C720D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:to="loc_us-gaap_DebtInstrumentTable_337C5656AF76685CF8E15C8E36C720D7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_D8E5AF998E1FDAFEC6955C8E36C733AC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_337C5656AF76685CF8E15C8E36C720D7" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_D8E5AF998E1FDAFEC6955C8E36C733AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_74D321831A6959CEF2585C8E36C7D828_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_D8E5AF998E1FDAFEC6955C8E36C733AC" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_74D321831A6959CEF2585C8E36C7D828_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_74D321831A6959CEF2585C8E36C7D828" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_D8E5AF998E1FDAFEC6955C8E36C733AC" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_74D321831A6959CEF2585C8E36C7D828" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SeniorNotesMember" xlink:label="loc_us-gaap_SeniorNotesMember_F73BA04A2BB3474644435C8E36C74F90" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_74D321831A6959CEF2585C8E36C7D828" xlink:to="loc_us-gaap_SeniorNotesMember_F73BA04A2BB3474644435C8E36C74F90" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_40E68B83E4CDBF990B735C8E36C72EE2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_337C5656AF76685CF8E15C8E36C720D7" xlink:to="loc_us-gaap_DebtInstrumentAxis_40E68B83E4CDBF990B735C8E36C72EE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_96C2802FED2FA4334C675C8E36C7B183_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_40E68B83E4CDBF990B735C8E36C72EE2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_96C2802FED2FA4334C675C8E36C7B183_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_96C2802FED2FA4334C675C8E36C7B183" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_40E68B83E4CDBF990B735C8E36C72EE2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_96C2802FED2FA4334C675C8E36C7B183" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_1E32E371D3FE1E33EA105C8E36C89CD6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_337C5656AF76685CF8E15C8E36C720D7" xlink:to="loc_us-gaap_VariableRateAxis_1E32E371D3FE1E33EA105C8E36C89CD6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_3551F4E34E7E7ACA7C225C8E36C868D1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_1E32E371D3FE1E33EA105C8E36C89CD6" xlink:to="loc_us-gaap_VariableRateDomain_3551F4E34E7E7ACA7C225C8E36C868D1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_3551F4E34E7E7ACA7C225C8E36C868D1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_1E32E371D3FE1E33EA105C8E36C89CD6" xlink:to="loc_us-gaap_VariableRateDomain_3551F4E34E7E7ACA7C225C8E36C868D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_DDFE5897C4152A26161A5C8E36C89386" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_337C5656AF76685CF8E15C8E36C720D7" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_DDFE5897C4152A26161A5C8E36C89386" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_CBD8F01C4D477C4651835C8E36C87D76_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_DDFE5897C4152A26161A5C8E36C89386" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_CBD8F01C4D477C4651835C8E36C87D76_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_CBD8F01C4D477C4651835C8E36C87D76" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_DDFE5897C4152A26161A5C8E36C89386" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_CBD8F01C4D477C4651835C8E36C87D76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_887DEA5B46B9771C7BB15C8E36C847AE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_337C5656AF76685CF8E15C8E36C720D7" xlink:to="loc_us-gaap_RangeAxis_887DEA5B46B9771C7BB15C8E36C847AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_EBD6E7F8F0C1982F10A85C8E36C82243_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_887DEA5B46B9771C7BB15C8E36C847AE" xlink:to="loc_us-gaap_RangeMember_EBD6E7F8F0C1982F10A85C8E36C82243_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_EBD6E7F8F0C1982F10A85C8E36C82243" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_887DEA5B46B9771C7BB15C8E36C847AE" xlink:to="loc_us-gaap_RangeMember_EBD6E7F8F0C1982F10A85C8E36C82243" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_0B442B9FB2374384C63E5C8E36C87BC9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_0B442B9FB2374384C63E5C8E36C87BC9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BankOverdrafts" xlink:label="loc_us-gaap_BankOverdrafts_AB6D73C965BC0C11761E5C8E36C8F446" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:to="loc_us-gaap_BankOverdrafts_AB6D73C965BC0C11761E5C8E36C8F446" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherShortTermBorrowings" xlink:label="loc_us-gaap_OtherShortTermBorrowings_4CAD9E7F70F23151143C5C8E36C8E1EB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:to="loc_us-gaap_OtherShortTermBorrowings_4CAD9E7F70F23151143C5C8E36C8E1EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="loc_us-gaap_ShortTermBorrowings_F232851F05B5E84A673F5C8E36C822F3" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:to="loc_us-gaap_ShortTermBorrowings_F232851F05B5E84A673F5C8E36C822F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongTermLineOfCredit" xlink:label="loc_us-gaap_LongTermLineOfCredit_78D29A9A8C63F62CB38D5C8E36C865B8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:to="loc_us-gaap_LongTermLineOfCredit_78D29A9A8C63F62CB38D5C8E36C865B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SeniorLongTermNotes" xlink:label="loc_us-gaap_SeniorLongTermNotes_7BD16C677ECE1BE8CDE25C8E36C84E1C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:to="loc_us-gaap_SeniorLongTermNotes_7BD16C677ECE1BE8CDE25C8E36C84E1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_B950F66C0FEE6FA917D45C8E36C8190C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_B950F66C0FEE6FA917D45C8E36C8190C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_3305B5FDA5D5092CBA605C8E36C8190F" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7752B23D89B7B0F110055C8E36C8B190" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_3305B5FDA5D5092CBA605C8E36C8190F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/DebtScheduleOfLongTermDebtInstrumentsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_E4C2FD78676F4A0630E54CDF7FD83290" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_A27281B0350212B6FE664CDF7FD1BDFC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_E4C2FD78676F4A0630E54CDF7FD83290" xlink:to="loc_us-gaap_DebtInstrumentTable_A27281B0350212B6FE664CDF7FD1BDFC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_9B69FF86F33D9263E7C04CDF7FD1CFCF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_A27281B0350212B6FE664CDF7FD1BDFC" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_9B69FF86F33D9263E7C04CDF7FD1CFCF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_63AD1D4618CEAB9697E94CDF7FD14B6E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_9B69FF86F33D9263E7C04CDF7FD1CFCF" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_63AD1D4618CEAB9697E94CDF7FD14B6E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_63AD1D4618CEAB9697E94CDF7FD14B6E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_9B69FF86F33D9263E7C04CDF7FD1CFCF" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_63AD1D4618CEAB9697E94CDF7FD14B6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_7B0671CA94D0D5290AFB4CDF7FD2E232" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_A27281B0350212B6FE664CDF7FD1BDFC" xlink:to="loc_us-gaap_DebtInstrumentAxis_7B0671CA94D0D5290AFB4CDF7FD2E232" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_CB86BBF7F59BBB06EBD84CDF7FD2244F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_7B0671CA94D0D5290AFB4CDF7FD2E232" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_CB86BBF7F59BBB06EBD84CDF7FD2244F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_CB86BBF7F59BBB06EBD84CDF7FD2244F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_7B0671CA94D0D5290AFB4CDF7FD2E232" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_CB86BBF7F59BBB06EBD84CDF7FD2244F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_F3F7046FD81114BC05CE4CDF7FD23CE4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_A27281B0350212B6FE664CDF7FD1BDFC" xlink:to="loc_us-gaap_VariableRateAxis_F3F7046FD81114BC05CE4CDF7FD23CE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_94D1343510C97EB3CBDC4CDF7FD7BF62_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_F3F7046FD81114BC05CE4CDF7FD23CE4" xlink:to="loc_us-gaap_VariableRateDomain_94D1343510C97EB3CBDC4CDF7FD7BF62_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_94D1343510C97EB3CBDC4CDF7FD7BF62" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_F3F7046FD81114BC05CE4CDF7FD23CE4" xlink:to="loc_us-gaap_VariableRateDomain_94D1343510C97EB3CBDC4CDF7FD7BF62" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_6BE723972A1FB3D4B77F4CDF7FD70639" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_A27281B0350212B6FE664CDF7FD1BDFC" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_6BE723972A1FB3D4B77F4CDF7FD70639" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_E1B6C36C74BB2D930E934CDF7FD76332_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_6BE723972A1FB3D4B77F4CDF7FD70639" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_E1B6C36C74BB2D930E934CDF7FD76332_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_E1B6C36C74BB2D930E934CDF7FD76332" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_6BE723972A1FB3D4B77F4CDF7FD70639" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_E1B6C36C74BB2D930E934CDF7FD76332" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_AD561FD451C681DB96F84CDF7FD8811B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_A27281B0350212B6FE664CDF7FD1BDFC" xlink:to="loc_us-gaap_RangeAxis_AD561FD451C681DB96F84CDF7FD8811B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_A5CAB2DC70CE03F139FE4CDF7FD87136_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_AD561FD451C681DB96F84CDF7FD8811B" xlink:to="loc_us-gaap_RangeMember_A5CAB2DC70CE03F139FE4CDF7FD87136_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_A5CAB2DC70CE03F139FE4CDF7FD87136" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_AD561FD451C681DB96F84CDF7FD8811B" xlink:to="loc_us-gaap_RangeMember_A5CAB2DC70CE03F139FE4CDF7FD87136" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDebtTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfDebtTableTextBlock_6460A800FE891A355E1E4CDF800404FA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_E4C2FD78676F4A0630E54CDF7FD83290" xlink:to="loc_us-gaap_ScheduleOfDebtTableTextBlock_6460A800FE891A355E1E4CDF800404FA" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/DebtWarehouseFacilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_60EF7264AAEF0EE28B9C5D8835125F3E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_4B280061BBED020D85905D88350BCA2E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_60EF7264AAEF0EE28B9C5D8835125F3E" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_4B280061BBED020D85905D88350BCA2E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineOfCreditFacilityByTypeAxis" xlink:label="loc_jll_LineOfCreditFacilityByTypeAxis_5E07FC8646673E885FC15D88350B07B2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_4B280061BBED020D85905D88350BCA2E" xlink:to="loc_jll_LineOfCreditFacilityByTypeAxis_5E07FC8646673E885FC15D88350B07B2" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineOfCreditFacilityByTypeDomain" xlink:label="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_LineOfCreditFacilityByTypeAxis_5E07FC8646673E885FC15D88350B07B2" xlink:to="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineOfCreditFacilityByTypeDomain" xlink:label="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_LineOfCreditFacilityByTypeAxis_5E07FC8646673E885FC15D88350B07B2" xlink:to="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AgreementexpiresFebruary282017Member" xlink:label="loc_jll_AgreementexpiresFebruary282017Member_88ABB8CFFCF6365869665D88350B49C5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_AgreementexpiresFebruary282017Member_88ABB8CFFCF6365869665D88350B49C5" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AgreementexpiresSeptember252017Member" xlink:label="loc_jll_AgreementexpiresSeptember252017Member_6E0BCF2243C5B9DEFAA35D88350CBC61" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_AgreementexpiresSeptember252017Member_6E0BCF2243C5B9DEFAA35D88350CBC61" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AgreementexpiresSeptember222017Member" xlink:label="loc_jll_AgreementexpiresSeptember222017Member_00E5F86E8A9C8819769C5D88351170B4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_AgreementexpiresSeptember222017Member_00E5F86E8A9C8819769C5D88351170B4" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AgreementexpiresSeptember222017ExtensionMember" xlink:label="loc_jll_AgreementexpiresSeptember222017ExtensionMember_8EBCAA619878E548D7085D8835116E4D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_AgreementexpiresSeptember222017ExtensionMember_8EBCAA619878E548D7085D8835116E4D" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AgreementexpiresMarch312017Member" xlink:label="loc_jll_AgreementexpiresMarch312017Member_6B9DD5C1D4AA859F705E5D88351150D7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_AgreementexpiresMarch312017Member_6B9DD5C1D4AA859F705E5D88351150D7" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AgreementexpiresOctober172016Member" xlink:label="loc_jll_AgreementexpiresOctober172016Member_D610237FD41BAD6DAECE5D883511F892" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_AgreementexpiresOctober172016Member_D610237FD41BAD6DAECE5D883511F892" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AgreementexpiresSeptember222016Member" xlink:label="loc_jll_AgreementexpiresSeptember222016Member_F24FC904EC57040535685D883511D76E" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_AgreementexpiresSeptember222016Member_F24FC904EC57040535685D883511D76E" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_VariableratenoncommittedMember" xlink:label="loc_jll_VariableratenoncommittedMember_3C639C3FC0A0DC7FBC575D8835110833" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_VariableratenoncommittedMember_3C639C3FC0A0DC7FBC575D8835110833" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_FannieMaeASAPprogramMember" xlink:label="loc_jll_FannieMaeASAPprogramMember_DF8A9572A3189DEDEA755D883512CD2B" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_FannieMaeASAPprogramMember_DF8A9572A3189DEDEA755D883512CD2B" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineofCreditGrossMember" xlink:label="loc_jll_LineofCreditGrossMember_55D1A730BF37D1C30AAD5D8835125AC4" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_jll_LineofCreditGrossMember_55D1A730BF37D1C30AAD5D8835125AC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_EF1E3D5C6796E0E81BF15D8835123CEC" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_LineOfCreditFacilityByTypeDomain_92AFBE1AC94A0FD9D7EB5D88350BC401" xlink:to="loc_us-gaap_LineOfCreditMember_EF1E3D5C6796E0E81BF15D8835123CEC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_872A3A04B48C428233DB5D88351276CC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_4B280061BBED020D85905D88350BCA2E" xlink:to="loc_us-gaap_CreditFacilityAxis_872A3A04B48C428233DB5D88351276CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_E67AE8B8C49FBC66575B5D883512D3D7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_872A3A04B48C428233DB5D88351276CC" xlink:to="loc_us-gaap_CreditFacilityDomain_E67AE8B8C49FBC66575B5D883512D3D7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_E67AE8B8C49FBC66575B5D883512D3D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_872A3A04B48C428233DB5D88351276CC" xlink:to="loc_us-gaap_CreditFacilityDomain_E67AE8B8C49FBC66575B5D883512D3D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_WarehouseAgreementBorrowingsMember" xlink:label="loc_us-gaap_WarehouseAgreementBorrowingsMember_CDF81F9E3650445ECC6D5D883512A538" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_E67AE8B8C49FBC66575B5D883512D3D7" xlink:to="loc_us-gaap_WarehouseAgreementBorrowingsMember_CDF81F9E3650445ECC6D5D883512A538" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_85F5B1CD5703A274927A5D883512D8C4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_E67AE8B8C49FBC66575B5D883512D3D7" xlink:to="loc_us-gaap_LineOfCreditMember_85F5B1CD5703A274927A5D883512D8C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDescription" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateDescription_8AA2D57880EB663420D65D88351234D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_60EF7264AAEF0EE28B9C5D8835125F3E" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateDescription_8AA2D57880EB663420D65D88351234D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LinesOfCreditCurrent" xlink:label="loc_us-gaap_LinesOfCreditCurrent_65E30B714447ABA51D115D883512E021" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_60EF7264AAEF0EE28B9C5D8835125F3E" xlink:to="loc_us-gaap_LinesOfCreditCurrent_65E30B714447ABA51D115D883512E021" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_422597152CE116188ACF5D88351279EF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_60EF7264AAEF0EE28B9C5D8835125F3E" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_422597152CE116188ACF5D88351279EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentRepurchaseAmount" xlink:label="loc_us-gaap_DebtInstrumentRepurchaseAmount_31A9A3E573D2AEEB8F465D883512EBFE" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_60EF7264AAEF0EE28B9C5D8835125F3E" xlink:to="loc_us-gaap_DebtInstrumentRepurchaseAmount_31A9A3E573D2AEEB8F465D883512EBFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_333466E1140DA1BF99605D8835139A38" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_60EF7264AAEF0EE28B9C5D8835125F3E" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_333466E1140DA1BF99605D8835139A38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentInterestRateTerms" xlink:label="loc_us-gaap_DebtInstrumentInterestRateTerms_7247F3444152A898D8655D8835133605" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_60EF7264AAEF0EE28B9C5D8835125F3E" xlink:to="loc_us-gaap_DebtInstrumentInterestRateTerms_7247F3444152A898D8655D8835133605" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/DebtWarehouseFacilitiesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurements" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurementsAssetsAndLiabilitiesMeasuredOnRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_91AA2468BF48F821A3814808448FE1F1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A812F171A539A9FEE8D84808448ED151" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_91AA2468BF48F821A3814808448FE1F1" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A812F171A539A9FEE8D84808448ED151" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_E7184396FDFBA62D3F1B4808448E5E1A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A812F171A539A9FEE8D84808448ED151" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_E7184396FDFBA62D3F1B4808448E5E1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_2E0B399DDF8FD693EF414808448E6668_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_E7184396FDFBA62D3F1B4808448E5E1A" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_2E0B399DDF8FD693EF414808448E6668_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_2E0B399DDF8FD693EF414808448E6668" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_E7184396FDFBA62D3F1B4808448E5E1A" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_2E0B399DDF8FD693EF414808448E6668" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_75A78DA7C40334A7473C4808448E2662" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_2E0B399DDF8FD693EF414808448E6668" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_75A78DA7C40334A7473C4808448E2662" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_089B2974655E920922344808448E9030" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_A812F171A539A9FEE8D84808448ED151" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_089B2974655E920922344808448E9030" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06E82CD66770222544164808448E7A3D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_089B2974655E920922344808448E9030" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06E82CD66770222544164808448E7A3D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06E82CD66770222544164808448E7A3D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_089B2974655E920922344808448E9030" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06E82CD66770222544164808448E7A3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_3686EFE49AE5662D0F714808448FE6F6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06E82CD66770222544164808448E7A3D" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_3686EFE49AE5662D0F714808448FE6F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_66E7726746AD3DDA432E4808448F3DA8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_06E82CD66770222544164808448E7A3D" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_66E7726746AD3DDA432E4808448F3DA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_C612E6550A62958287EE4808448FA196" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_91AA2468BF48F821A3814808448FE1F1" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_C612E6550A62958287EE4808448FA196" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyContractAssetFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_D480DE2EB3F7ECFBDAB1480844901EC3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_C612E6550A62958287EE4808448FA196" xlink:to="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_D480DE2EB3F7ECFBDAB1480844901EC3" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DeferredCompensationPlanAssetsFairValueDisclosure" xlink:label="loc_jll_DeferredCompensationPlanAssetsFairValueDisclosure_5E5490189F739DBA45E5480844909559" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_C612E6550A62958287EE4808448FA196" xlink:to="loc_jll_DeferredCompensationPlanAssetsFairValueDisclosure_5E5490189F739DBA45E5480844909559" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeAssets" xlink:label="loc_us-gaap_DerivativeAssets_0550D15BAFD1B87B0F444861EB4C1726" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_C612E6550A62958287EE4808448FA196" xlink:to="loc_us-gaap_DerivativeAssets_0550D15BAFD1B87B0F444861EB4C1726" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_066E77DD7CD0D2FD6DE448084490E96F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_C612E6550A62958287EE4808448FA196" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_066E77DD7CD0D2FD6DE448084490E96F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_076216FC45CBD4868DFF48084490345D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_91AA2468BF48F821A3814808448FE1F1" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_076216FC45CBD4868DFF48084490345D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_9FBDF986E8258E0D70BF48084491B614" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_076216FC45CBD4868DFF48084490345D" xlink:to="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_9FBDF986E8258E0D70BF48084491B614" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_0A718654055B984E044648084491343D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_076216FC45CBD4868DFF48084490345D" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_0A718654055B984E044648084491343D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_DFBB4C60E9892046341148084491A1E9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_076216FC45CBD4868DFF48084490345D" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_DFBB4C60E9892046341148084491A1E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeLiabilities" xlink:label="loc_us-gaap_DerivativeLiabilities_DFD632104A9C234E24E0486AB90D92E8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_076216FC45CBD4868DFF48084490345D" xlink:to="loc_us-gaap_DerivativeLiabilities_DFD632104A9C234E24E0486AB90D92E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_F43EC776612DD03E3B4648084491C6A5" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_076216FC45CBD4868DFF48084490345D" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_F43EC776612DD03E3B4648084491C6A5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurementsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2E1B5E8A59B826B41F6D5C5873FE4C8D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2E1B5E8A59B826B41F6D5C5873FE4C8D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_3DB1F31B9D7DC704FC535C5873FE8435" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2E1B5E8A59B826B41F6D5C5873FE4C8D" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_3DB1F31B9D7DC704FC535C5873FE8435" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_AEA89C0E30DE8489030B5C5873FE37EF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3DB1F31B9D7DC704FC535C5873FE8435" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_AEA89C0E30DE8489030B5C5873FE37EF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_AEA89C0E30DE8489030B5C5873FE37EF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3DB1F31B9D7DC704FC535C5873FE8435" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_AEA89C0E30DE8489030B5C5873FE37EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SeniorNotesMember" xlink:label="loc_us-gaap_SeniorNotesMember_A70BFF8BFFF1D93B45B15C5873FE1DA2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_AEA89C0E30DE8489030B5C5873FE37EF" xlink:to="loc_us-gaap_SeniorNotesMember_A70BFF8BFFF1D93B45B15C5873FE1DA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_AD3709FC79BA7A7D6CA05C5873FF7C26" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2E1B5E8A59B826B41F6D5C5873FE4C8D" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_AD3709FC79BA7A7D6CA05C5873FF7C26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_97D2565A5C9909DD3E015C5873FF0E73_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_AD3709FC79BA7A7D6CA05C5873FF7C26" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_97D2565A5C9909DD3E015C5873FF0E73_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_97D2565A5C9909DD3E015C5873FF0E73" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_AD3709FC79BA7A7D6CA05C5873FF7C26" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_97D2565A5C9909DD3E015C5873FF0E73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="loc_us-gaap_ForeignExchangeContractMember_468963C7B903CFB797A45C5873FFBF07" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_97D2565A5C9909DD3E015C5873FF0E73" xlink:to="loc_us-gaap_ForeignExchangeContractMember_468963C7B903CFB797A45C5873FFBF07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_CB4E1C6AC8491BE7D26C5C5873FFF4DA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2E1B5E8A59B826B41F6D5C5873FE4C8D" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_CB4E1C6AC8491BE7D26C5C5873FFF4DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5CE104ABC115D16E244A5C5873FFFF50_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_CB4E1C6AC8491BE7D26C5C5873FFF4DA" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5CE104ABC115D16E244A5C5873FFFF50_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5CE104ABC115D16E244A5C5873FFFF50" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_CB4E1C6AC8491BE7D26C5C5873FFF4DA" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5CE104ABC115D16E244A5C5873FFFF50" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_156A4EDED6CA605E8F135C5873FFFFEE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_5CE104ABC115D16E244A5C5873FFFF50" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_156A4EDED6CA605E8F135C5873FFFFEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_989D07D1FC253D146D785C587400FDAA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_2E1B5E8A59B826B41F6D5C5873FE4C8D" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_989D07D1FC253D146D785C587400FDAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_E5B7FFB12E753600D84C5C587400DA6A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_989D07D1FC253D146D785C587400FDAA" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_E5B7FFB12E753600D84C5C587400DA6A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_E5B7FFB12E753600D84C5C587400DA6A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_989D07D1FC253D146D785C587400FDAA" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_E5B7FFB12E753600D84C5C587400DA6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_D46589DB090265BB75DD5C5874004061" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_E5B7FFB12E753600D84C5C587400DA6A" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_D46589DB090265BB75DD5C5874004061" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_DerivativeNotionalAmount" xlink:label="loc_invest_DerivativeNotionalAmount_E45D1DBD66B147C6AA255C5874007475" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_invest_DerivativeNotionalAmount_E45D1DBD66B147C6AA255C5874007475" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ForeignCurrencyForwardContractNetNotionalValue" xlink:label="loc_jll_ForeignCurrencyForwardContractNetNotionalValue_B628250491039F1A39D75C587405BE4D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_jll_ForeignCurrencyForwardContractNetNotionalValue_B628250491039F1A39D75C587405BE4D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyContractAssetFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_4F60ED826DD0EA716E795C587405F4C0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_4F60ED826DD0EA716E795C587405F4C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_9CDFADE7C05250CB69D95C587405DE64" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_9CDFADE7C05250CB69D95C587405DE64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_41C5E2278B10C67128845C5874053861" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_41C5E2278B10C67128845C5874053861" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeAssetFairValueGrossLiability" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiability_4420FB252B4D6882542F5C587405EACC" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiability_4420FB252B4D6882542F5C587405EACC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeLiabilityFairValueGrossAsset" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_E3E30DB949EF9CC3E7F05C587405F261" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_E3E30DB949EF9CC3E7F05C587405F261" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_C871464FCA6544C567085C5874051C1A" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_C871464FCA6544C567085C5874051C1A" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DeferredCompensationPlanAssetsFairValueDisclosure" xlink:label="loc_jll_DeferredCompensationPlanAssetsFairValueDisclosure_7B541CB63362CE810C765C5874056EF3" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_jll_DeferredCompensationPlanAssetsFairValueDisclosure_7B541CB63362CE810C765C5874056EF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_37468D5903F1A6EFE8595C58740507D6" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_37468D5903F1A6EFE8595C58740507D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CommonStockIssuedEmployeeStockTrust" xlink:label="loc_us-gaap_CommonStockIssuedEmployeeStockTrust_1A4BFF6F8CAF1BA0E3345C5874050A4F" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_C31C6751B06746BEC2FD5C5874003B67" xlink:to="loc_us-gaap_CommonStockIssuedEmployeeStockTrust_1A4BFF6F8CAF1BA0E3345C5874050A4F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurementsFairValueMeasurementsRecurringAndNonrecurringDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3E565C3B50D1201581025C5523522E29" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_CE210E987D7A7B958B9B5C55235112D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3E565C3B50D1201581025C5523522E29" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_CE210E987D7A7B958B9B5C55235112D7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_6E83FC7F66493CC426925C57BE290FDE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_CE210E987D7A7B958B9B5C55235112D7" xlink:to="loc_us-gaap_FinancialInstrumentAxis_6E83FC7F66493CC426925C57BE290FDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_EFD51A21617789AC0D725C592632968B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_6E83FC7F66493CC426925C57BE290FDE" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_EFD51A21617789AC0D725C592632968B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_EFD51A21617789AC0D725C592632968B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_6E83FC7F66493CC426925C57BE290FDE" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_EFD51A21617789AC0D725C592632968B" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EarnoutLiabilitiesMember" xlink:label="loc_jll_EarnoutLiabilitiesMember_3657193B4387F315A88B5C5AE925C710" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_EFD51A21617789AC0D725C592632968B" xlink:to="loc_jll_EarnoutLiabilitiesMember_3657193B4387F315A88B5C5AE925C710" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeMember" xlink:label="loc_us-gaap_DerivativeMember_82069BD014B251058AB85C57DA70BD65" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_EFD51A21617789AC0D725C592632968B" xlink:to="loc_us-gaap_DerivativeMember_82069BD014B251058AB85C57DA70BD65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_CD8008001DAC5E2777775C552351DCB3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_CE210E987D7A7B958B9B5C55235112D7" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_CD8008001DAC5E2777775C552351DCB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_BDA637434AE532E493545C552352CDE1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_CD8008001DAC5E2777775C552351DCB3" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_BDA637434AE532E493545C552352CDE1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_BDA637434AE532E493545C552352CDE1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_CD8008001DAC5E2777775C552351DCB3" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_BDA637434AE532E493545C552352CDE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_37C336246F72F1A68AE25C552352C365" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_BDA637434AE532E493545C552352CDE1" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_37C336246F72F1A68AE25C552352C365" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6DE48C8669C8BB367D3A5C55235270B2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_CE210E987D7A7B958B9B5C55235112D7" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6DE48C8669C8BB367D3A5C55235270B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_47DBD510FD123BF7DC395C552352203F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6DE48C8669C8BB367D3A5C55235270B2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_47DBD510FD123BF7DC395C552352203F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_47DBD510FD123BF7DC395C552352203F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6DE48C8669C8BB367D3A5C55235270B2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_47DBD510FD123BF7DC395C552352203F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_8B70044F9452DDA304535C55235279EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_47DBD510FD123BF7DC395C552352203F" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_8B70044F9452DDA304535C55235279EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_B4AA6A1E417A5B92689F5C552352277A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3E565C3B50D1201581025C5523522E29" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_B4AA6A1E417A5B92689F5C552352277A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_DF29776D7892024D2C8E5C552353522E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3E565C3B50D1201581025C5523522E29" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_DF29776D7892024D2C8E5C552353522E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_598ED4B4A92C1F07C7715C552353EF48" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3E565C3B50D1201581025C5523522E29" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_598ED4B4A92C1F07C7715C552353EF48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_A8364990A5F95A0E12735C55235320CA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3E565C3B50D1201581025C5523522E29" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_A8364990A5F95A0E12735C55235320CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_0AC701867C8658C7910B5C552353541B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3E565C3B50D1201581025C5523522E29" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_0AC701867C8658C7910B5C552353541B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet" xlink:label="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_0E7CE8D6D51B6C4A46775C552353D493" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3E565C3B50D1201581025C5523522E29" xlink:to="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_0E7CE8D6D51B6C4A46775C552353D493" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/FairValueMeasurementsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_49503BA14AAFB900FE1961BEAEDAC43B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_6B4829AAE638DD5261E161BEAED4B7B9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_49503BA14AAFB900FE1961BEAEDAC43B" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_6B4829AAE638DD5261E161BEAED4B7B9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_985E19C96395EC3D1FAF61BEAED5F825" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_6B4829AAE638DD5261E161BEAED4B7B9" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_985E19C96395EC3D1FAF61BEAED5F825" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1172BA3CDFCC82CDFF0161BEAED51C2B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_985E19C96395EC3D1FAF61BEAED5F825" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1172BA3CDFCC82CDFF0161BEAED51C2B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1172BA3CDFCC82CDFF0161BEAED51C2B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_985E19C96395EC3D1FAF61BEAED5F825" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1172BA3CDFCC82CDFF0161BEAED51C2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_4C4213EE8EBBEE15029361BEAED50E8C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_6B4829AAE638DD5261E161BEAED4B7B9" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_4C4213EE8EBBEE15029361BEAED50E8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_78A5F198B8B69C0A4F6561BEAED53833_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_4C4213EE8EBBEE15029361BEAED50E8C" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_78A5F198B8B69C0A4F6561BEAED53833_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_78A5F198B8B69C0A4F6561BEAED53833" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_4C4213EE8EBBEE15029361BEAED50E8C" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_78A5F198B8B69C0A4F6561BEAED53833" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLocationAxis" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_7A83F9B42758CBBA42D161BEAED5C363" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_6B4829AAE638DD5261E161BEAED4B7B9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_7A83F9B42758CBBA42D161BEAED5C363" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_3BDDCFDC617AA23ED5D661BEAED5436E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_7A83F9B42758CBBA42D161BEAED5C363" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_3BDDCFDC617AA23ED5D661BEAED5436E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLocationDomain" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_3BDDCFDC617AA23ED5D661BEAED5436E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLocationAxis_7A83F9B42758CBBA42D161BEAED5C363" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLocationDomain_3BDDCFDC617AA23ED5D661BEAED5436E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_FAFDB19C1E498A2F693561BEAEDAA850" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_49503BA14AAFB900FE1961BEAEDAC43B" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_FAFDB19C1E498A2F693561BEAEDAA850" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxes" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesDeferredTaxAssetsAndDeferredTaxLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_1F31C430583C77465880477BB2FA724B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_0E75BCF901D6609AAA68477BB2F9B024" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1F31C430583C77465880477BB2FA724B" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_0E75BCF901D6609AAA68477BB2F9B024" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_50788432F369C6964C96477BB2F918EF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_0E75BCF901D6609AAA68477BB2F9B024" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_50788432F369C6964C96477BB2F918EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_4A1F2C33F95356358482477BB2F9CB64_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_50788432F369C6964C96477BB2F918EF" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_4A1F2C33F95356358482477BB2F9CB64_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_4A1F2C33F95356358482477BB2F9CB64" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_50788432F369C6964C96477BB2F918EF" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_4A1F2C33F95356358482477BB2F9CB64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_4C75362E56AE971434AC477BB2F933D9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_4A1F2C33F95356358482477BB2F9CB64" xlink:to="loc_us-gaap_DomesticCountryMember_4C75362E56AE971434AC477BB2F933D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_A596D572ADBA122787D9477BB2F94A40" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_4A1F2C33F95356358482477BB2F9CB64" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_A596D572ADBA122787D9477BB2F94A40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_4E9DF3C2C39EB3727B65477BB2F98A59" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_4A1F2C33F95356358482477BB2F9CB64" xlink:to="loc_us-gaap_ForeignCountryMember_4E9DF3C2C39EB3727B65477BB2F98A59" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_IncomeTaxUnremittedForeignEarningsEstimatedTaxEffect" xlink:label="loc_jll_IncomeTaxUnremittedForeignEarningsEstimatedTaxEffect_04F7C6CC972F440E29F8477BB2FA89E4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1F31C430583C77465880477BB2FA724B" xlink:to="loc_jll_IncomeTaxUnremittedForeignEarningsEstimatedTaxEffect_04F7C6CC972F440E29F8477BB2FA89E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLossCarryforwards" xlink:label="loc_us-gaap_OperatingLossCarryforwards_3F21992429EFF2DEF895477BB2FA87CD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1F31C430583C77465880477BB2FA724B" xlink:to="loc_us-gaap_OperatingLossCarryforwards_3F21992429EFF2DEF895477BB2FA87CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLossCarryforwardsExpirationDate" xlink:label="loc_us-gaap_OperatingLossCarryforwardsExpirationDate_052FEE89516338C72CBF477BB2FAB6C8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1F31C430583C77465880477BB2FA724B" xlink:to="loc_us-gaap_OperatingLossCarryforwardsExpirationDate_052FEE89516338C72CBF477BB2FAB6C8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesForeignIncomeTaxDetails" xlink:type="extended">
    <link:loc xlink:href="jll-20161231.xsd#jll_IncomeTaxForeignTaxJurisdictionLineItems" xlink:label="loc_jll_IncomeTaxForeignTaxJurisdictionLineItems_159BB205C60940FCA5F5477B9E54BAB8" xlink:type="locator" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ForeignIncomeTaxJurisdictionTable" xlink:label="loc_jll_ForeignIncomeTaxJurisdictionTable_6AE1663CD062FCB8177D477B9E53DA8B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_jll_IncomeTaxForeignTaxJurisdictionLineItems_159BB205C60940FCA5F5477B9E54BAB8" xlink:to="loc_jll_ForeignIncomeTaxJurisdictionTable_6AE1663CD062FCB8177D477B9E53DA8B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ForeignIncomeTaxAuthorityAxis" xlink:label="loc_jll_ForeignIncomeTaxAuthorityAxis_F0911CB9E10BC9B9DDE3477B9E531299" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_jll_ForeignIncomeTaxJurisdictionTable_6AE1663CD062FCB8177D477B9E53DA8B" xlink:to="loc_jll_ForeignIncomeTaxAuthorityAxis_F0911CB9E10BC9B9DDE3477B9E531299" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_AllCountriesDomain" xlink:label="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_ForeignIncomeTaxAuthorityAxis_F0911CB9E10BC9B9DDE3477B9E531299" xlink:to="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_AllCountriesDomain" xlink:label="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_ForeignIncomeTaxAuthorityAxis_F0911CB9E10BC9B9DDE3477B9E531299" xlink:to="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_HK" xlink:label="loc_country_HK_5A04A445EBDA3044C631477B9E530176" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:to="loc_country_HK_5A04A445EBDA3044C631477B9E530176" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_SG" xlink:label="loc_country_SG_A28C6213BA70A11E05D9477B9E53A235" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:to="loc_country_SG_A28C6213BA70A11E05D9477B9E53A235" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_GB" xlink:label="loc_country_GB_16AE550ED843DBDD7617477B9E53A34C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:to="loc_country_GB_16AE550ED843DBDD7617477B9E53A34C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_NL" xlink:label="loc_country_NL_2445877DB8F6D2C34916477B9E54723E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:to="loc_country_NL_2445877DB8F6D2C34916477B9E54723E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_CY" xlink:label="loc_country_CY_AE1AE6C9B004C1DE8A3A477B9E548582" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:to="loc_country_CY_AE1AE6C9B004C1DE8A3A477B9E548582" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_IE" xlink:label="loc_country_IE_D59914FBBAD5928B19A2477B9E54A4C3" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:to="loc_country_IE_D59914FBBAD5928B19A2477B9E54A4C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_PL" xlink:label="loc_country_PL_6E18F960BFE7D93A9F98477B9E54B2BC" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:to="loc_country_PL_6E18F960BFE7D93A9F98477B9E54B2BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd#country_CN" xlink:label="loc_country_CN_AD259A7EC98448F2502C477B9E539F8E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:to="loc_country_CN_AD259A7EC98448F2502C477B9E539F8E" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_OtherForeignTaxAuthoritiesMember" xlink:label="loc_jll_OtherForeignTaxAuthoritiesMember_28ED9F01D3455C91EACB477B9E54029D" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_country_AllCountriesDomain_BAF9B4FF60D313FE1E52477B9E5310A7" xlink:to="loc_jll_OtherForeignTaxAuthoritiesMember_28ED9F01D3455C91EACB477B9E54029D" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_NumberOfCountriesInWhichCompanyHasOperationsThatConstituteIncomeTaxPresence" xlink:label="loc_jll_NumberOfCountriesInWhichCompanyHasOperationsThatConstituteIncomeTaxPresence_318D38642B09A3E79BD9477B9E54F1F6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_IncomeTaxForeignTaxJurisdictionLineItems_159BB205C60940FCA5F5477B9E54BAB8" xlink:to="loc_jll_NumberOfCountriesInWhichCompanyHasOperationsThatConstituteIncomeTaxPresence_318D38642B09A3E79BD9477B9E54F1F6" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EffectiveIncomeTaxRateReconciliationForeignStatutoryIncomeTaxRate" xlink:label="loc_jll_EffectiveIncomeTaxRateReconciliationForeignStatutoryIncomeTaxRate_DFF57616F9B0961862FB477B9E5464C2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_IncomeTaxForeignTaxJurisdictionLineItems_159BB205C60940FCA5F5477B9E54BAB8" xlink:to="loc_jll_EffectiveIncomeTaxRateReconciliationForeignStatutoryIncomeTaxRate_DFF57616F9B0961862FB477B9E5464C2" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_IncomeTaxRateThresholdDeterminingVeryLowRate" xlink:label="loc_jll_IncomeTaxRateThresholdDeterminingVeryLowRate_BDC3D083E6BB08B64F68477B9E54B73C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_IncomeTaxForeignTaxJurisdictionLineItems_159BB205C60940FCA5F5477B9E54BAB8" xlink:to="loc_jll_IncomeTaxRateThresholdDeterminingVeryLowRate_BDC3D083E6BB08B64F68477B9E54B73C" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferenceCalculation" xlink:label="loc_jll_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferenceCalculation_EF8B7E379450ABC77700477B9E54A145" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_IncomeTaxForeignTaxJurisdictionLineItems_159BB205C60940FCA5F5477B9E54BAB8" xlink:to="loc_jll_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferenceCalculation_EF8B7E379450ABC77700477B9E54A145" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesIncomeBeforeTaxesDomesticAndInternationalDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesIncomeTaxExpenseAndTaxRateReconciliationDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesInterestExpenseDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesProvisionForIncomeTaxesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesTaxLiabilityAndUncertaintiesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_ADF1A0EFF2EFA9895972477BA0A5A094" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_4B2FC4686F38B583150A477BA0A55CF9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_ADF1A0EFF2EFA9895972477BA0A5A094" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_4B2FC4686F38B583150A477BA0A55CF9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis" xlink:label="loc_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_2D3FCDB68D0C647C7148477BA0A54950" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTable_4B2FC4686F38B583150A477BA0A55CF9" xlink:to="loc_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_2D3FCDB68D0C647C7148477BA0A54950" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleNatureOfUncertaintyDomain" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleNatureOfUncertaintyDomain_1768195FA1CC72CF4BF8477BA0A5EAAA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_2D3FCDB68D0C647C7148477BA0A54950" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleNatureOfUncertaintyDomain_1768195FA1CC72CF4BF8477BA0A5EAAA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleNatureOfUncertaintyDomain" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleNatureOfUncertaintyDomain_1768195FA1CC72CF4BF8477BA0A5EAAA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItemAxis_2D3FCDB68D0C647C7148477BA0A54950" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleNatureOfUncertaintyDomain_1768195FA1CC72CF4BF8477BA0A5EAAA" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ConclusionOfExaminationByTaxAuthoritiesMember" xlink:label="loc_jll_ConclusionOfExaminationByTaxAuthoritiesMember_0B2F6911623034EA7B31477BA0A507A8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleNatureOfUncertaintyDomain_1768195FA1CC72CF4BF8477BA0A5EAAA" xlink:to="loc_jll_ConclusionOfExaminationByTaxAuthoritiesMember_0B2F6911623034EA7B31477BA0A507A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_6C1BF68E7A0BE70B5E72477BA0A579DE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleLineItems_ADF1A0EFF2EFA9895972477BA0A5A094" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit_6C1BF68E7A0BE70B5E72477BA0A579DE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/IncomeTaxesValuationAllowanceDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowanceLineItems" xlink:label="loc_us-gaap_ValuationAllowanceLineItems_25AC5261D54C1E6B93966DD30FD56586" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowanceTable" xlink:label="loc_us-gaap_ValuationAllowanceTable_67D7F06D68D83992CE866DD30FD5DB18" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_25AC5261D54C1E6B93966DD30FD56586" xlink:to="loc_us-gaap_ValuationAllowanceTable_67D7F06D68D83992CE866DD30FD5DB18" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowanceByDeferredTaxAssetAxis" xlink:label="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_316C1E63898ADA6F3B5D6DD30FD59776" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_67D7F06D68D83992CE866DD30FD5DB18" xlink:to="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_316C1E63898ADA6F3B5D6DD30FD59776" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetDomain" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_895A1DAF4BB29AE552086DD30FD5298B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_316C1E63898ADA6F3B5D6DD30FD59776" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_895A1DAF4BB29AE552086DD30FD5298B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DeferredTaxAssetDomain" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_895A1DAF4BB29AE552086DD30FD5298B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_316C1E63898ADA6F3B5D6DD30FD59776" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_895A1DAF4BB29AE552086DD30FD5298B" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DeferredTaxAssetsOperatingLossCarryforwardsUtilizedOrExpiredMember" xlink:label="loc_jll_DeferredTaxAssetsOperatingLossCarryforwardsUtilizedOrExpiredMember_8495993A5B08F49073C66DD30FD56E7E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_895A1DAF4BB29AE552086DD30FD5298B" xlink:to="loc_jll_DeferredTaxAssetsOperatingLossCarryforwardsUtilizedOrExpiredMember_8495993A5B08F49073C66DD30FD56E7E" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DeferredTaxAssetsOperatingLossCarryforwardsEstablishedOrContinuedMember" xlink:label="loc_jll_DeferredTaxAssetsOperatingLossCarryforwardsEstablishedOrContinuedMember_DDAB949A1DB64A387BFE6DD30FD5128E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_895A1DAF4BB29AE552086DD30FD5298B" xlink:to="loc_jll_DeferredTaxAssetsOperatingLossCarryforwardsEstablishedOrContinuedMember_DDAB949A1DB64A387BFE6DD30FD5128E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_4C644C25D25D31D618636DD30FD52D4F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_25AC5261D54C1E6B93966DD30FD56586" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_4C644C25D25D31D618636DD30FD52D4F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/InvestmentsInRealEstateVentures" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/InvestmentsInRealEstateVenturesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_A9F9F431D8804251912F6417E86A5946" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_A9F9F431D8804251912F6417E86A5946" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis" xlink:label="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_2D9A8D8E9559C2F907FA6417E86F05A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_A9F9F431D8804251912F6417E86A5946" xlink:to="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_2D9A8D8E9559C2F907FA6417E86F05A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5A2C69E8B8A7D6FE91F76417E86FF6AE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_2D9A8D8E9559C2F907FA6417E86F05A1" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5A2C69E8B8A7D6FE91F76417E86FF6AE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ClassificationOfVariableInterestEntityDomain" xlink:label="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5A2C69E8B8A7D6FE91F76417E86FF6AE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis_2D9A8D8E9559C2F907FA6417E86F05A1" xlink:to="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5A2C69E8B8A7D6FE91F76417E86FF6AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryAggregatedDisclosureMember" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryAggregatedDisclosureMember_98905018FC385057756A6417E86FB4B2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5A2C69E8B8A7D6FE91F76417E86FF6AE" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryAggregatedDisclosureMember_98905018FC385057756A6417E86FB4B2" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ConsolidatedVariableInterestEntitiesMember" xlink:label="loc_jll_ConsolidatedVariableInterestEntitiesMember_641F31BFB189063DF0786417E870358E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassificationOfVariableInterestEntityDomain_5A2C69E8B8A7D6FE91F76417E86FF6AE" xlink:to="loc_jll_ConsolidatedVariableInterestEntitiesMember_641F31BFB189063DF0786417E870358E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_709DD0FD2DAAAA1D3B5E6417E870D768" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_A9F9F431D8804251912F6417E86A5946" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_709DD0FD2DAAAA1D3B5E6417E870D768" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_A599A79515004B5227026417E870F2A8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_709DD0FD2DAAAA1D3B5E6417E870D768" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_A599A79515004B5227026417E870F2A8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_A599A79515004B5227026417E870F2A8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_709DD0FD2DAAAA1D3B5E6417E870D768" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_A599A79515004B5227026417E870F2A8" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LasalleInvestmentCompanyIiMember" xlink:label="loc_jll_LasalleInvestmentCompanyIiMember_D5E40C24A60AB01E43476417E87065DE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_A599A79515004B5227026417E870F2A8" xlink:to="loc_jll_LasalleInvestmentCompanyIiMember_D5E40C24A60AB01E43476417E87065DE" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ExclusiveofLaSalleInvestmentCompanyIIMember" xlink:label="loc_jll_ExclusiveofLaSalleInvestmentCompanyIIMember_5D8DAC892BC4DA307B266417E87137EE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_A599A79515004B5227026417E870F2A8" xlink:to="loc_jll_ExclusiveofLaSalleInvestmentCompanyIIMember_5D8DAC892BC4DA307B266417E87137EE" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_NumberOfSeparatePropertyOrFundCoInvestments" xlink:label="loc_jll_NumberOfSeparatePropertyOrFundCoInvestments_7FD2266E1319BF78C7646417E8712145" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_jll_NumberOfSeparatePropertyOrFundCoInvestments_7FD2266E1319BF78C7646417E8712145" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EquityMethodInvestmentOwnershipPercentageMinimum" xlink:label="loc_jll_EquityMethodInvestmentOwnershipPercentageMinimum_5BDE0E4AD932210561906417E871F128" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_jll_EquityMethodInvestmentOwnershipPercentageMinimum_5BDE0E4AD932210561906417E871F128" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EquityMethodInvestmentOwnershipPercentageMaximum" xlink:label="loc_jll_EquityMethodInvestmentOwnershipPercentageMaximum_A6D339D44D76C5FDFA166417E87194EE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_jll_EquityMethodInvestmentOwnershipPercentageMaximum_A6D339D44D76C5FDFA166417E87194EE" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_UnfundedCapitalCommitmentsForFutureFundings" xlink:label="loc_jll_UnfundedCapitalCommitmentsForFutureFundings_8A352CD34488CEA4BA0A6417E8713AC0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_jll_UnfundedCapitalCommitmentsForFutureFundings_8A352CD34488CEA4BA0A6417E8713AC0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_614214D4A39E38DC068E6417E871BE9A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_614214D4A39E38DC068E6417E871BE9A" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_SummaryOfEquityMethodInvestmentsAbstract" xlink:label="loc_jll_SummaryOfEquityMethodInvestmentsAbstract_85130C379F3D570CE0106417E871DBA6" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_jll_SummaryOfEquityMethodInvestmentsAbstract_85130C379F3D570CE0106417E871DBA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_22EA944BE4B1C1ED3C226417E8710CB4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SummaryOfEquityMethodInvestmentsAbstract_85130C379F3D570CE0106417E871DBA6" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_22EA944BE4B1C1ED3C226417E8710CB4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_215C010D54AFA0AD1F156417E87184D5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SummaryOfEquityMethodInvestmentsAbstract_85130C379F3D570CE0106417E871DBA6" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_215C010D54AFA0AD1F156417E87184D5" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EntityshareofUnfundedCapitalCommitmentsforFutureFundings" xlink:label="loc_jll_EntityshareofUnfundedCapitalCommitmentsforFutureFundings_8FD14A4EE51E0DBA16E36417E8719152" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SummaryOfEquityMethodInvestmentsAbstract_85130C379F3D570CE0106417E871DBA6" xlink:to="loc_jll_EntityshareofUnfundedCapitalCommitmentsforFutureFundings_8FD14A4EE51E0DBA16E36417E8719152" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EntityShareOfExposureOnOutstandingBorrowings" xlink:label="loc_jll_EntityShareOfExposureOnOutstandingBorrowings_8BB7BF42DB8C72EBAF956417E8712D6E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SummaryOfEquityMethodInvestmentsAbstract_85130C379F3D570CE0106417E871DBA6" xlink:to="loc_jll_EntityShareOfExposureOnOutstandingBorrowings_8BB7BF42DB8C72EBAF956417E8712D6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss" xlink:label="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_F64EF7B4DB794DA925936417E87205F7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_SummaryOfEquityMethodInvestmentsAbstract_85130C379F3D570CE0106417E871DBA6" xlink:to="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_F64EF7B4DB794DA925936417E87205F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet" xlink:label="loc_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet_EEB34D40B719B6CCC7CB6417E8722070" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_VariableInterestEntityNonconsolidatedCarryingAmountAssetsAndLiabilitiesNet_EEB34D40B719B6CCC7CB6417E8722070" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_254CFFC6440DEE670CF76417E872153A" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_254CFFC6440DEE670CF76417E872153A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_70BB219D89115DC0465C6417E8728613" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_70BB219D89115DC0465C6417E8728613" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherAssets" xlink:label="loc_us-gaap_OtherAssets_2FA0368CBFBD49F0598A6417E872FFB8" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_OtherAssets_2FA0368CBFBD49F0598A6417E872FFB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_2F7FF59E44C49567028E6417E872ED5B" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_Assets_2F7FF59E44C49567028E6417E872ED5B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_FC414584CFEFF7A35F336417E872A70D" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_FC414584CFEFF7A35F336417E872A70D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DueToRelatedPartiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_03937424D6888E0FB3CB6417E87224B1" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_DueToRelatedPartiesCurrentAndNoncurrent_03937424D6888E0FB3CB6417E87224B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_4E1933FB6D834046ED4C6417E8724DC7" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_Liabilities_4E1933FB6D834046ED4C6417E8724DC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MembersEquity" xlink:label="loc_us-gaap_MembersEquity_B8C896841487634A3D226417E87272F0" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_MembersEquity_B8C896841487634A3D226417E87272F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_2079DFB77DD743A0B5626417E872D8ED" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_2079DFB77DD743A0B5626417E872D8ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_223F7692680275B003D26417E872DCCB" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_Revenues_223F7692680275B003D26417E872DCCB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherExpenses" xlink:label="loc_us-gaap_OtherExpenses_8068BE833056524617276417E873090B" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_OtherExpenses_8068BE833056524617276417E873090B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_GainsLossesOnSalesOfInvestmentRealEstate" xlink:label="loc_us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_D90A5321E67B86E010B16417E8737139" xlink:type="locator" />
    <link:definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_D90A5321E67B86E010B16417E8737139" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_6597A1F938270698AE586417E878AAE4" xlink:type="locator" />
    <link:definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_ProfitLoss_6597A1F938270698AE586417E878AAE4" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_GainonSalesofInvestmentRealEstateProportionateShareEquityMethod" xlink:label="loc_jll_GainonSalesofInvestmentRealEstateProportionateShareEquityMethod_7CFC45F0D5CE9A6449516417E8789FDC" xlink:type="locator" />
    <link:definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_jll_GainonSalesofInvestmentRealEstateProportionateShareEquityMethod_7CFC45F0D5CE9A6449516417E8789FDC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAbstract" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAbstract_1BA1C29E2B88C28524A56417E8788F62" xlink:type="locator" />
    <link:definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAbstract_1BA1C29E2B88C28524A56417E8788F62" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract" xlink:label="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract_82EF3B5775D1F7925F296417E878DAA1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAbstract_1BA1C29E2B88C28524A56417E8788F62" xlink:to="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract_82EF3B5775D1F7925F296417E878DAA1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets_D469949B5C36791D10616417E879C504" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract_82EF3B5775D1F7925F296417E878DAA1" xlink:to="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets_D469949B5C36791D10616417E879C504" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_FCD2486DA632090E42B56417E879E72E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract_82EF3B5775D1F7925F296417E878DAA1" xlink:to="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_FCD2486DA632090E42B56417E879E72E" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EquityMethodInvestmentSummarizedFinancialInformationMortgageIndebtedness" xlink:label="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationMortgageIndebtedness_85BD5BB51BBCEFA85ED46417E8795285" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract_82EF3B5775D1F7925F296417E878DAA1" xlink:to="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationMortgageIndebtedness_85BD5BB51BBCEFA85ED46417E8795285" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EquityMethodInvestmentSummarizedFinancialInformationOtherBorrowings" xlink:label="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationOtherBorrowings_3CD999F12E23FA082A3B6417E8794388" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract_82EF3B5775D1F7925F296417E878DAA1" xlink:to="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationOtherBorrowings_3CD999F12E23FA082A3B6417E8794388" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities_A81BA3FCBA0D67A119D06417E879F65C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract_82EF3B5775D1F7925F296417E878DAA1" xlink:to="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilities_A81BA3FCBA0D67A119D06417E879F65C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity_5EE4D77883FC406AF9B86417E8795840" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_EquityMethodInvestmentSummarizedFinancialInformationBalanceSheetAbstract_82EF3B5775D1F7925F296417E878DAA1" xlink:to="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquity_5EE4D77883FC406AF9B86417E8795840" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementAbstract" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementAbstract_4D62F04C8B18E4BE64FE6417E879E685" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAbstract_1BA1C29E2B88C28524A56417E8788F62" xlink:to="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementAbstract_4D62F04C8B18E4BE64FE6417E879E685" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_5C9B2F4990ECA21F2EAF6417E8791D05" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementAbstract_4D62F04C8B18E4BE64FE6417E879E685" xlink:to="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_5C9B2F4990ECA21F2EAF6417E8791D05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss" xlink:label="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_7F5CB70B44F81617B1EE6417E879F018" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementAbstract_4D62F04C8B18E4BE64FE6417E879E685" xlink:to="loc_us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_7F5CB70B44F81617B1EE6417E879F018" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AssetImpairmentChargesAbstract" xlink:label="loc_us-gaap_AssetImpairmentChargesAbstract_A5AFA8B4F8A0FC971ADE6417E879DF58" xlink:type="locator" />
    <link:definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_us-gaap_AssetImpairmentChargesAbstract_A5AFA8B4F8A0FC971ADE6417E879DF58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ImpairmentOfRealEstate" xlink:label="loc_us-gaap_ImpairmentOfRealEstate_5AD1AFB213A486C3B9EC6417E8793093" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetImpairmentChargesAbstract_A5AFA8B4F8A0FC971ADE6417E879DF58" xlink:to="loc_us-gaap_ImpairmentOfRealEstate_5AD1AFB213A486C3B9EC6417E8793093" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_FairValueAbstract" xlink:label="loc_jll_FairValueAbstract_041A83E1E58CF29A67896417E87A086A" xlink:type="locator" />
    <link:definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_FF685D1E7E7B3AB6E2736417E8717489" xlink:to="loc_jll_FairValueAbstract_041A83E1E58CF29A67896417E87A086A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_03DD6E24663F64A0758B6417E87AF800" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_FairValueAbstract_041A83E1E58CF29A67896417E87A086A" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_03DD6E24663F64A0758B6417E87AF800" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_InvestmentsInRealEstateVentures" xlink:label="loc_jll_InvestmentsInRealEstateVentures_1E103C52025CB6C547B26417E87A1AFB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_FairValueAbstract_041A83E1E58CF29A67896417E87A086A" xlink:to="loc_jll_InvestmentsInRealEstateVentures_1E103C52025CB6C547B26417E87A1AFB" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DistributionsToRealEstateVentures" xlink:label="loc_jll_DistributionsToRealEstateVentures_6A557BB331544740D4526417E87A51BD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_FairValueAbstract_041A83E1E58CF29A67896417E87A086A" xlink:to="loc_jll_DistributionsToRealEstateVentures_6A557BB331544740D4526417E87A51BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="loc_us-gaap_UnrealizedGainLossOnInvestments_6BFE9E9A8A287D448B746417E87B0F99" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_FairValueAbstract_041A83E1E58CF29A67896417E87A086A" xlink:to="loc_us-gaap_UnrealizedGainLossOnInvestments_6BFE9E9A8A287D448B746417E87B0F99" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ForeignCurrencyTranslationAdjustmentsNet" xlink:label="loc_jll_ForeignCurrencyTranslationAdjustmentsNet_0D5E169ECABFA3B27AAF6417E87B9B6F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_FairValueAbstract_041A83E1E58CF29A67896417E87A086A" xlink:to="loc_jll_ForeignCurrencyTranslationAdjustmentsNet_0D5E169ECABFA3B27AAF6417E87B9B6F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/InvestmentsInRealEstateVenturesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/Leases" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/LeasesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_4EB22F038C94523FBFC063FD46AE08ED" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4C02CF89B89144E0919363FD46AD7513" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4EB22F038C94523FBFC063FD46AE08ED" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4C02CF89B89144E0919363FD46AD7513" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_06507F01E62EEFDEAB7663FD46AE4F49" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_4C02CF89B89144E0919363FD46AD7513" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_06507F01E62EEFDEAB7663FD46AE4F49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_61EB1A05EE2E1AE5C78E63FD46AE3057_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_06507F01E62EEFDEAB7663FD46AE4F49" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_61EB1A05EE2E1AE5C78E63FD46AE3057_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_61EB1A05EE2E1AE5C78E63FD46AE3057" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_06507F01E62EEFDEAB7663FD46AE4F49" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_61EB1A05EE2E1AE5C78E63FD46AE3057" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_KingSturgeMember" xlink:label="loc_jll_KingSturgeMember_730132A7CA12A1552F4B63FD46AEF131" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_61EB1A05EE2E1AE5C78E63FD46AE3057" xlink:to="loc_jll_KingSturgeMember_730132A7CA12A1552F4B63FD46AEF131" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AccruedLiabilitiesRelatedToExcessLeaseSpace" xlink:label="loc_jll_AccruedLiabilitiesRelatedToExcessLeaseSpace_7401247E394849189A6563FD46AE899F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4EB22F038C94523FBFC063FD46AE08ED" xlink:to="loc_jll_AccruedLiabilitiesRelatedToExcessLeaseSpace_7401247E394849189A6563FD46AE899F" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AccruedLiabilitiesRelatedToExcessLeaseSpaceResultingFromBusinessAcquisition" xlink:label="loc_jll_AccruedLiabilitiesRelatedToExcessLeaseSpaceResultingFromBusinessAcquisition_AF33A48264471412EAA063FD46AE604F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4EB22F038C94523FBFC063FD46AE08ED" xlink:to="loc_jll_AccruedLiabilitiesRelatedToExcessLeaseSpaceResultingFromBusinessAcquisition_AF33A48264471412EAA063FD46AE604F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals_673D10E8DCEA6F0E7BB163FD46AE2AB2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4EB22F038C94523FBFC063FD46AE08ED" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals_673D10E8DCEA6F0E7BB163FD46AE2AB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingLeasesRentExpenseNet" xlink:label="loc_us-gaap_OperatingLeasesRentExpenseNet_0D799EA1AF497E45A13E63FD46AE94C7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4EB22F038C94523FBFC063FD46AE08ED" xlink:to="loc_us-gaap_OperatingLeasesRentExpenseNet_0D799EA1AF497E45A13E63FD46AE94C7" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/LeasesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/Organization" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/OrganizationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductInformationLineItems" xlink:label="loc_us-gaap_ProductInformationLineItems_3BF308D0315E488B68C26DD310C826F3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfProductInformationTable" xlink:label="loc_us-gaap_ScheduleOfProductInformationTable_F17E2B612C7A5F211F476DD310C74B12" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductInformationLineItems_3BF308D0315E488B68C26DD310C826F3" xlink:to="loc_us-gaap_ScheduleOfProductInformationTable_F17E2B612C7A5F211F476DD310C74B12" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_E5223E86523A869D5C906DD310C70E70" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfProductInformationTable_F17E2B612C7A5F211F476DD310C74B12" xlink:to="loc_us-gaap_ProductOrServiceAxis_E5223E86523A869D5C906DD310C70E70" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ProductOrServiceAxis_E5223E86523A869D5C906DD310C70E70" xlink:to="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ProductOrServiceAxis_E5223E86523A869D5C906DD310C70E70" xlink:to="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RealEstateServicesLeasingMember" xlink:label="loc_jll_RealEstateServicesLeasingMember_BE04F9E773BBA3F5DD606DD310C88D90" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8" xlink:to="loc_jll_RealEstateServicesLeasingMember_BE04F9E773BBA3F5DD606DD310C88D90" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RealEstateServicesCapitalMarketsAndHotelsMember" xlink:label="loc_jll_RealEstateServicesCapitalMarketsAndHotelsMember_2013F0BBAC90F631EADE6DD310C8A7C0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8" xlink:to="loc_jll_RealEstateServicesCapitalMarketsAndHotelsMember_2013F0BBAC90F631EADE6DD310C8A7C0" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RealEstateServicesPropertyAndFacilitiesManagementMember" xlink:label="loc_jll_RealEstateServicesPropertyAndFacilitiesManagementMember_BB7A7FD2D07474370A046DD310C84D0B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8" xlink:to="loc_jll_RealEstateServicesPropertyAndFacilitiesManagementMember_BB7A7FD2D07474370A046DD310C84D0B" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RealEstateServicesProjectAndDevelopmentServicesMember" xlink:label="loc_jll_RealEstateServicesProjectAndDevelopmentServicesMember_10AD4472031F3272ABF66DD310C8DA9A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8" xlink:to="loc_jll_RealEstateServicesProjectAndDevelopmentServicesMember_10AD4472031F3272ABF66DD310C8DA9A" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RealEstateServicesAdvisoryConsultingAndOtherMember" xlink:label="loc_jll_RealEstateServicesAdvisoryConsultingAndOtherMember_65428B60F1A2B4F656026DD310C8763A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8" xlink:to="loc_jll_RealEstateServicesAdvisoryConsultingAndOtherMember_65428B60F1A2B4F656026DD310C8763A" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LasalleInvestmentManagementMember" xlink:label="loc_jll_LasalleInvestmentManagementMember_7886F02215E284AE3E746DD310C89FFD" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_2D2C2AF85D006C568F636DD310C889C8" xlink:to="loc_jll_LasalleInvestmentManagementMember_7886F02215E284AE3E746DD310C89FFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_DD434F0B6050DC269E0A6DD310C83DE3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductInformationLineItems_3BF308D0315E488B68C26DD310C826F3" xlink:to="loc_us-gaap_Revenues_DD434F0B6050DC269E0A6DD310C83DE3" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/OrganizationTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/QuarterlyResultsOfOperationsUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/QuarterlyResultsOfOperationsUnauditedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4C24F6E7614F7D189B6E63E2E0301638" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4C24F6E7614F7D189B6E63E2E0301638" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="jll-20161231.xsd#jll_QuarterlyDetailAxis" xlink:label="loc_jll_QuarterlyDetailAxis_4A6C02E0372AD9A83D2A63E2E031A175" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4C24F6E7614F7D189B6E63E2E0301638" xlink:to="loc_jll_QuarterlyDetailAxis_4A6C02E0372AD9A83D2A63E2E031A175" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_QuarterlyDetailDomain" xlink:label="loc_jll_QuarterlyDetailDomain_D99359F311BF7D7FDE8463E2E03107EC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_QuarterlyDetailAxis_4A6C02E0372AD9A83D2A63E2E031A175" xlink:to="loc_jll_QuarterlyDetailDomain_D99359F311BF7D7FDE8463E2E03107EC_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_QuarterlyDetailDomain" xlink:label="loc_jll_QuarterlyDetailDomain_D99359F311BF7D7FDE8463E2E03107EC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_QuarterlyDetailAxis_4A6C02E0372AD9A83D2A63E2E031A175" xlink:to="loc_jll_QuarterlyDetailDomain_D99359F311BF7D7FDE8463E2E03107EC" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_QuarterlyResultsofOperationsMember" xlink:label="loc_jll_QuarterlyResultsofOperationsMember_9F4C6D003397B685C61563E2E031FF94" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_QuarterlyDetailDomain_D99359F311BF7D7FDE8463E2E03107EC" xlink:to="loc_jll_QuarterlyResultsofOperationsMember_9F4C6D003397B685C61563E2E031FF94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_26F3E40E31E9E8F1B98563E2E03143AB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4C24F6E7614F7D189B6E63E2E0301638" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_26F3E40E31E9E8F1B98563E2E03143AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_CA3B789133809472240E63E2E031C7EA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_26F3E40E31E9E8F1B98563E2E03143AB" xlink:to="loc_us-gaap_SegmentDomain_CA3B789133809472240E63E2E031C7EA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_CA3B789133809472240E63E2E031C7EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_26F3E40E31E9E8F1B98563E2E03143AB" xlink:to="loc_us-gaap_SegmentDomain_CA3B789133809472240E63E2E031C7EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ReportableSubsegmentsMember" xlink:label="loc_us-gaap_ReportableSubsegmentsMember_22055348BFDE74BB022563E2E032D81D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_CA3B789133809472240E63E2E031C7EA" xlink:to="loc_us-gaap_ReportableSubsegmentsMember_22055348BFDE74BB022563E2E032D81D" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_InvestmentManagementMember" xlink:label="loc_jll_InvestmentManagementMember_07C167E99DD901071A5563E2E0325322" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_CA3B789133809472240E63E2E031C7EA" xlink:to="loc_jll_InvestmentManagementMember_07C167E99DD901071A5563E2E0325322" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_B8DCCB9707B861A18DE363E2E0324C8B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_4C24F6E7614F7D189B6E63E2E0301638" xlink:to="loc_us-gaap_StatementGeographicalAxis_B8DCCB9707B861A18DE363E2E0324C8B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_234773122DFCF9DBDAA163E2E0329A55_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_B8DCCB9707B861A18DE363E2E0324C8B" xlink:to="loc_us-gaap_SegmentGeographicalDomain_234773122DFCF9DBDAA163E2E0329A55_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_234773122DFCF9DBDAA163E2E0329A55" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_B8DCCB9707B861A18DE363E2E0324C8B" xlink:to="loc_us-gaap_SegmentGeographicalDomain_234773122DFCF9DBDAA163E2E0329A55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EMEAMember" xlink:label="loc_us-gaap_EMEAMember_FBC85BDA715C8A0DFCB163E2E03734BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_234773122DFCF9DBDAA163E2E0329A55" xlink:to="loc_us-gaap_EMEAMember_FBC85BDA715C8A0DFCB163E2E03734BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_A821C2D60B26B3C33F4263E2E03745DC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_234773122DFCF9DBDAA163E2E0329A55" xlink:to="loc_us-gaap_AsiaPacificMember_A821C2D60B26B3C33F4263E2E03745DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AmericasMember" xlink:label="loc_us-gaap_AmericasMember_515850DC695CBA19999D63E2E0379B06" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_234773122DFCF9DBDAA163E2E0329A55" xlink:to="loc_us-gaap_AmericasMember_515850DC695CBA19999D63E2E0379B06" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_SegmentReportingInformationIncomeforReportableSegment" xlink:label="loc_jll_SegmentReportingInformationIncomeforReportableSegment_6DCCDBE9CD751CA4380963E2E0370BB3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_jll_SegmentReportingInformationIncomeforReportableSegment_6DCCDBE9CD751CA4380963E2E0370BB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_88DA27B28002D8B3B47563E2E037FF79" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_88DA27B28002D8B3B47563E2E037FF79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RealEstateRevenueNet" xlink:label="loc_us-gaap_RealEstateRevenueNet_B56F44CEFB64B548CB5763E2E037BF34" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_us-gaap_RealEstateRevenueNet_B56F44CEFB64B548CB5763E2E037BF34" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_2CEAF1413E8DEFC8D40263E2E037A949" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_us-gaap_OperatingExpenses_2CEAF1413E8DEFC8D40263E2E037A949" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCostsAndAssetImpairmentCharges" xlink:label="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_1227C7D49F0E0EF05BEF63E2E037A71F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_1227C7D49F0E0EF05BEF63E2E037A71F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_288A2C8119721B09BB3F63E2E037DBD0" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_us-gaap_OperatingIncomeLoss_288A2C8119721B09BB3F63E2E037DBD0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_CCAC2FC9C12B43B53E7F63E2E038A4D1" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_CCAC2FC9C12B43B53E7F63E2E038A4D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_BE326865659308B0311163E2E03882A4" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_us-gaap_EarningsPerShareBasic_BE326865659308B0311163E2E03882A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_48B6EA7CD113CFB1CB5A63E2E038CEFE" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7A34250796929AFA705D63E2E037EEF6" xlink:to="loc_us-gaap_EarningsPerShareDiluted_48B6EA7CD113CFB1CB5A63E2E038CEFE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/QuarterlyResultsOfOperationsUnauditedTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/RestructuringAndAcquisitionCharges" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/RestructuringAndAcquisitionChargesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_A1687A0E32936F49F8C35D86D57B8761" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5458869A2C98DE61BC815D86D57A7E98" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_A1687A0E32936F49F8C35D86D57B8761" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5458869A2C98DE61BC815D86D57A7E98" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_BC56A9732A7D7AD2C2AB5D86D57A9299" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5458869A2C98DE61BC815D86D57A7E98" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_BC56A9732A7D7AD2C2AB5D86D57A9299" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_D9BA276DDA0BF2518AA55D86D57AEDF5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_BC56A9732A7D7AD2C2AB5D86D57A9299" xlink:to="loc_us-gaap_SegmentDomain_D9BA276DDA0BF2518AA55D86D57AEDF5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_D9BA276DDA0BF2518AA55D86D57AEDF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_BC56A9732A7D7AD2C2AB5D86D57A9299" xlink:to="loc_us-gaap_SegmentDomain_D9BA276DDA0BF2518AA55D86D57AEDF5" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_InvestmentManagementMember" xlink:label="loc_jll_InvestmentManagementMember_29114EAB2FAAC3B3A00D5D86D57A9FC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_D9BA276DDA0BF2518AA55D86D57AEDF5" xlink:to="loc_jll_InvestmentManagementMember_29114EAB2FAAC3B3A00D5D86D57A9FC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_C5F8452B8BF7B7BFC0A55D86D57A68A9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_5458869A2C98DE61BC815D86D57A7E98" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_C5F8452B8BF7B7BFC0A55D86D57A68A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_326F2A41836AAFE5F6065D86D57AA568_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_C5F8452B8BF7B7BFC0A55D86D57A68A9" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_326F2A41836AAFE5F6065D86D57AA568_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_326F2A41836AAFE5F6065D86D57AA568" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_C5F8452B8BF7B7BFC0A55D86D57A68A9" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_326F2A41836AAFE5F6065D86D57AA568" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="loc_us-gaap_EmployeeSeveranceMember_9641EDB97AFD16CE29055D86D57AF267" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_326F2A41836AAFE5F6065D86D57AA568" xlink:to="loc_us-gaap_EmployeeSeveranceMember_9641EDB97AFD16CE29055D86D57AF267" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RetentionBonusesMember" xlink:label="loc_jll_RetentionBonusesMember_C4B787BE55DC89E26FB75D86D57BD179" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_326F2A41836AAFE5F6065D86D57AA568" xlink:to="loc_jll_RetentionBonusesMember_C4B787BE55DC89E26FB75D86D57BD179" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ContractTerminationMember" xlink:label="loc_us-gaap_ContractTerminationMember_7036DF404D3F9D4348EE5D86D57B2429" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_326F2A41836AAFE5F6065D86D57AA568" xlink:to="loc_us-gaap_ContractTerminationMember_7036DF404D3F9D4348EE5D86D57B2429" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_AcquisitionAndOtherCostsMember" xlink:label="loc_jll_AcquisitionAndOtherCostsMember_B95E0BCFFBAC88D2D4C25D86D57B5866" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_326F2A41836AAFE5F6065D86D57AA568" xlink:to="loc_jll_AcquisitionAndOtherCostsMember_B95E0BCFFBAC88D2D4C25D86D57B5866" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCostsAndAssetImpairmentCharges" xlink:label="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_B2B6A3560E94CBFCA7685D86D57B4F83" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_A1687A0E32936F49F8C35D86D57B8761" xlink:to="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_B2B6A3560E94CBFCA7685D86D57B4F83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_6AD875254243AB2851845D86D57BC1F1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_A1687A0E32936F49F8C35D86D57B8761" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_6AD875254243AB2851845D86D57BC1F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_431C8F5C1F77514BB1E85D86D57B78C7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_A1687A0E32936F49F8C35D86D57B8761" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_431C8F5C1F77514BB1E85D86D57B78C7" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_BusinessCombinationIndemnificationAssets" xlink:label="loc_jll_BusinessCombinationIndemnificationAssets_6B3660C7D65714265D125D86D57B851E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_A1687A0E32936F49F8C35D86D57B8761" xlink:to="loc_jll_BusinessCombinationIndemnificationAssets_6B3660C7D65714265D125D86D57B851E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringReserveRollForward" xlink:label="loc_us-gaap_RestructuringReserveRollForward_60CA435C01FC37E992135D86D57B62BF" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_A1687A0E32936F49F8C35D86D57B8761" xlink:to="loc_us-gaap_RestructuringReserveRollForward_60CA435C01FC37E992135D86D57B62BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringReserve" xlink:label="loc_us-gaap_RestructuringReserve_4531C0E4A87DAAFA56485D86D57B4C32" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_60CA435C01FC37E992135D86D57B62BF" xlink:to="loc_us-gaap_RestructuringReserve_4531C0E4A87DAAFA56485D86D57B4C32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_0176E77B31E07789CBF25D86D57B210A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_60CA435C01FC37E992135D86D57B62BF" xlink:to="loc_us-gaap_RestructuringCharges_0176E77B31E07789CBF25D86D57B210A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:label="loc_us-gaap_PaymentsForRestructuring_AA5E0A06CBE48AF5542C5D86D57B193A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_60CA435C01FC37E992135D86D57B62BF" xlink:to="loc_us-gaap_PaymentsForRestructuring_AA5E0A06CBE48AF5542C5D86D57B193A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/RestructuringAndAcquisitionChargesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/RetirementPlans" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/RetirementPlansDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1A5C5EE9216F75CE9D6C62D53FBB3652" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1A5C5EE9216F75CE9D6C62D53FBB3652" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_739BF8A718CF329AC09762D53FBCD1C0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1A5C5EE9216F75CE9D6C62D53FBB3652" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_739BF8A718CF329AC09762D53FBCD1C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F964365277446CEBF8DA62D53FBC89E1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_739BF8A718CF329AC09762D53FBCD1C0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F964365277446CEBF8DA62D53FBC89E1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F964365277446CEBF8DA62D53FBC89E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_739BF8A718CF329AC09762D53FBCD1C0" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F964365277446CEBF8DA62D53FBC89E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_8BE8F451E33B12B7796262D53FBC0E6F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F964365277446CEBF8DA62D53FBC89E1" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_8BE8F451E33B12B7796262D53FBC0E6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_BDF90CF77B2820472E6C62D53FBCB80A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F964365277446CEBF8DA62D53FBC89E1" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_BDF90CF77B2820472E6C62D53FBCB80A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_0C047D0D91C06027E74162D53FBCCFE3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_F964365277446CEBF8DA62D53FBC89E1" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_0C047D0D91C06027E74162D53FBCCFE3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_B8002D95C1DDF7EC615062D53FBC3671" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1A5C5EE9216F75CE9D6C62D53FBB3652" xlink:to="loc_us-gaap_RangeAxis_B8002D95C1DDF7EC615062D53FBC3671" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_3F90F32E64AC7492167E62D53FBC2255_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_B8002D95C1DDF7EC615062D53FBC3671" xlink:to="loc_us-gaap_RangeMember_3F90F32E64AC7492167E62D53FBC2255_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_3F90F32E64AC7492167E62D53FBC2255" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_B8002D95C1DDF7EC615062D53FBC3671" xlink:to="loc_us-gaap_RangeMember_3F90F32E64AC7492167E62D53FBC2255" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_56C7F295D47EADA0356562D53FBD41D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_3F90F32E64AC7492167E62D53FBC2255" xlink:to="loc_us-gaap_MinimumMember_56C7F295D47EADA0356562D53FBD41D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_D545071774B1A9F3FAD162D53FBDAD63" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_3F90F32E64AC7492167E62D53FBC2255" xlink:to="loc_us-gaap_MaximumMember_D545071774B1A9F3FAD162D53FBDAD63" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedContributionPlansDisclosuresAxis" xlink:label="loc_jll_DefinedContributionPlansDisclosuresAxis_916924AB33ABBAF6D23A62D53FBDB9C5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1A5C5EE9216F75CE9D6C62D53FBB3652" xlink:to="loc_jll_DefinedContributionPlansDisclosuresAxis_916924AB33ABBAF6D23A62D53FBDB9C5" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedContributionPlansAndOtherPostretirementBenefitPlansDomain" xlink:label="loc_jll_DefinedContributionPlansAndOtherPostretirementBenefitPlansDomain_666577BA414A13FB993862D53FBD22D2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_DefinedContributionPlansDisclosuresAxis_916924AB33ABBAF6D23A62D53FBDB9C5" xlink:to="loc_jll_DefinedContributionPlansAndOtherPostretirementBenefitPlansDomain_666577BA414A13FB993862D53FBD22D2_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedContributionPlansAndOtherPostretirementBenefitPlansDomain" xlink:label="loc_jll_DefinedContributionPlansAndOtherPostretirementBenefitPlansDomain_666577BA414A13FB993862D53FBD22D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_DefinedContributionPlansDisclosuresAxis_916924AB33ABBAF6D23A62D53FBDB9C5" xlink:to="loc_jll_DefinedContributionPlansAndOtherPostretirementBenefitPlansDomain_666577BA414A13FB993862D53FBD22D2" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_UnitedStatesRetirementPlansOfUsEntityDefinedContributionMember" xlink:label="loc_jll_UnitedStatesRetirementPlansOfUsEntityDefinedContributionMember_3B57334684EEF2CB7EC162D53FBD6E55" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_DefinedContributionPlansAndOtherPostretirementBenefitPlansDomain_666577BA414A13FB993862D53FBD22D2" xlink:to="loc_jll_UnitedStatesRetirementPlansOfUsEntityDefinedContributionMember_3B57334684EEF2CB7EC162D53FBD6E55" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ForeignRetirementPlansDefinedContributionMember" xlink:label="loc_jll_ForeignRetirementPlansDefinedContributionMember_118C54C0CA6FB4E90B0A62D53FBDEFAE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_DefinedContributionPlansAndOtherPostretirementBenefitPlansDomain_666577BA414A13FB993862D53FBD22D2" xlink:to="loc_jll_ForeignRetirementPlansDefinedContributionMember_118C54C0CA6FB4E90B0A62D53FBDEFAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_49428EEF3C98F4710F8C62D53FBD1997" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1A5C5EE9216F75CE9D6C62D53FBB3652" xlink:to="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_49428EEF3C98F4710F8C62D53FBD1997" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="loc_us-gaap_DefinedBenefitPlansDomain_67CF43ACA11E2269C1E862D53FBD594D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_49428EEF3C98F4710F8C62D53FBD1997" xlink:to="loc_us-gaap_DefinedBenefitPlansDomain_67CF43ACA11E2269C1E862D53FBD594D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="loc_us-gaap_DefinedBenefitPlansDomain_67CF43ACA11E2269C1E862D53FBD594D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_49428EEF3C98F4710F8C62D53FBD1997" xlink:to="loc_us-gaap_DefinedBenefitPlansDomain_67CF43ACA11E2269C1E862D53FBD594D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignPensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_ForeignPensionPlansDefinedBenefitMember_7A1B7C5905944199BAB162D53FBDCA60" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_67CF43ACA11E2269C1E862D53FBD594D" xlink:to="loc_us-gaap_ForeignPensionPlansDefinedBenefitMember_7A1B7C5905944199BAB162D53FBDCA60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_004EF2C6609E2AAF2C9762D53FBDB149" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_004EF2C6609E2AAF2C9762D53FBDB149" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_132067A954211371C15C62D53FBD1630" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_132067A954211371C15C62D53FBD1630" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_NumberOfContributoryDefinedBenefitPensionPlans" xlink:label="loc_jll_NumberOfContributoryDefinedBenefitPensionPlans_1B194CDB181DCA93B1E862D53FBE07B9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_jll_NumberOfContributoryDefinedBenefitPensionPlans_1B194CDB181DCA93B1E862D53FBE07B9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_05FC78711051B78C3A1E62D53FBE5617" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_05FC78711051B78C3A1E62D53FBE5617" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_E00FB16597C102A43F5062D53FBEB921" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_05FC78711051B78C3A1E62D53FBE5617" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_E00FB16597C102A43F5062D53FBEB921" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_5FB4192D85DA2754785D62D53FBE570E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_05FC78711051B78C3A1E62D53FBE5617" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_5FB4192D85DA2754785D62D53FBE570E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_E694E6BBD07091F7098362D53FBED456" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_05FC78711051B78C3A1E62D53FBE5617" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_E694E6BBD07091F7098362D53FBED456" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit_ACD26C71EAA3097AFBE362D53FBE3786" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_05FC78711051B78C3A1E62D53FBE5617" xlink:to="loc_us-gaap_DefinedBenefitPlanFutureAmortizationOfPriorServiceCostCredit_ACD26C71EAA3097AFBE362D53FBE3786" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_3A9E8909D84FFF1CAB9362D53FBE92F3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_05FC78711051B78C3A1E62D53FBE5617" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_3A9E8909D84FFF1CAB9362D53FBE92F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_7D09BA8A679AC76CAACC62D53FBEF8AE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_05FC78711051B78C3A1E62D53FBE5617" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_7D09BA8A679AC76CAACC62D53FBEF8AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_5E4EAF62F2399FADE28962D53FBEAC07" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_05FC78711051B78C3A1E62D53FBE5617" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_5E4EAF62F2399FADE28962D53FBEAC07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_AAB2C1BA1841F2E12A8B62D53FBF8144" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_AAB2C1BA1841F2E12A8B62D53FBF8144" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_FC974C067E1D2B00EE8062D53FBFE4A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_AAB2C1BA1841F2E12A8B62D53FBF8144" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_FC974C067E1D2B00EE8062D53FBFE4A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanCurtailments" xlink:label="loc_us-gaap_DefinedBenefitPlanCurtailments_A15D6A6ED8E51B75B2CB62D53FBFA5C0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_AAB2C1BA1841F2E12A8B62D53FBF8144" xlink:to="loc_us-gaap_DefinedBenefitPlanCurtailments_A15D6A6ED8E51B75B2CB62D53FBFA5C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByPlanParticipants" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByPlanParticipants_26ADA5B120D3091E6FB962D53FBF232B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_AAB2C1BA1841F2E12A8B62D53FBF8144" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByPlanParticipants_26ADA5B120D3091E6FB962D53FBF232B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitsPaid_E6C558D7319C3155431162D53FBFCD1B" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_AAB2C1BA1841F2E12A8B62D53FBF8144" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitsPaid_E6C558D7319C3155431162D53FBFCD1B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_11753CB5A6F44380F13162D53FBF6325" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_AAB2C1BA1841F2E12A8B62D53FBF8144" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_11753CB5A6F44380F13162D53FBF6325" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation_FA674D1EE358D97D8F4E62D53FBF3C86" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_AAB2C1BA1841F2E12A8B62D53FBF8144" xlink:to="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation_FA674D1EE358D97D8F4E62D53FBF3C86" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanOtherIncreaseDecreaseInBenefitObligation" xlink:label="loc_jll_DefinedBenefitPlanOtherIncreaseDecreaseInBenefitObligation_AACD5B5EA095798C6E2B62D53FC04343" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_AAB2C1BA1841F2E12A8B62D53FBF8144" xlink:to="loc_jll_DefinedBenefitPlanOtherIncreaseDecreaseInBenefitObligation_AACD5B5EA095798C6E2B62D53FC04343" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_5D321B4E46733A0E31A762D53FC03359" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_5D321B4E46733A0E31A762D53FC03359" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_7B0C04F330E36FA8D19762D53FC00FE3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_5D321B4E46733A0E31A762D53FC03359" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_7B0C04F330E36FA8D19762D53FC00FE3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_28071AFBAD041BFC23FF62D53FC0E3C7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_5D321B4E46733A0E31A762D53FC03359" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_28071AFBAD041BFC23FF62D53FC0E3C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_6D2DBD9EA9284ED541C662D53FC0866C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_5D321B4E46733A0E31A762D53FC03359" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_6D2DBD9EA9284ED541C662D53FC0866C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_EF5519FBD335ECDD39CD62D53FC0B95E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_5D321B4E46733A0E31A762D53FC03359" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_EF5519FBD335ECDD39CD62D53FC0B95E" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanPlanContributions" xlink:label="loc_jll_DefinedBenefitPlanPlanContributions_A078182A1EC98B0DCB8262D53FC0000E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_5D321B4E46733A0E31A762D53FC03359" xlink:to="loc_jll_DefinedBenefitPlanPlanContributions_A078182A1EC98B0DCB8262D53FC0000E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets_7B85C5A6DEFA0C988FC062D53FC0D39C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_5D321B4E46733A0E31A762D53FC03359" xlink:to="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets_7B85C5A6DEFA0C988FC062D53FC0D39C" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanOtherIncreaseDecreaseInPlanAssets" xlink:label="loc_jll_DefinedBenefitPlanOtherIncreaseDecreaseInPlanAssets_04D342BF52A45F7636B762D53FC0C8B0" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_5D321B4E46733A0E31A762D53FC03359" xlink:to="loc_jll_DefinedBenefitPlanOtherIncreaseDecreaseInPlanAssets_04D342BF52A45F7636B762D53FC0C8B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_BF6EA024CA43B19136FF62D53FC097D5" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_BF6EA024CA43B19136FF62D53FC097D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_B0324F8A1FC578CE574562D53FC08BE0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_BF6EA024CA43B19136FF62D53FC097D5" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_B0324F8A1FC578CE574562D53FC08BE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_5DE410D6B00D3CD303D562D53FC0F46D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_BF6EA024CA43B19136FF62D53FC097D5" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_5DE410D6B00D3CD303D562D53FC0F46D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_C67D314DD4A281ECC16762D53FC13C89" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_BF6EA024CA43B19136FF62D53FC097D5" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_C67D314DD4A281ECC16762D53FC13C89" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_1D61C00E934C9F4AFED062D53FC1E179" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_BF6EA024CA43B19136FF62D53FC097D5" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_1D61C00E934C9F4AFED062D53FC1E179" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear_FD173278E25E8427127C62D53FC1A96D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_BF6EA024CA43B19136FF62D53FC097D5" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear_FD173278E25E8427127C62D53FC1A96D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_F97BEC0F89FF9A8AB4B862D53FC1AE7B" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_F97BEC0F89FF9A8AB4B862D53FC1AE7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_5AC3D5E171CD0236880862D53FC1DC08" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_F97BEC0F89FF9A8AB4B862D53FC1AE7B" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_5AC3D5E171CD0236880862D53FC1DC08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_5ED6C1DB35DEC06009EE62D53FC1CE76" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_F97BEC0F89FF9A8AB4B862D53FC1AE7B" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_5ED6C1DB35DEC06009EE62D53FC1CE76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_B1AF139D67A48D20549D62D53FC1A980" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_F97BEC0F89FF9A8AB4B862D53FC1AE7B" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_B1AF139D67A48D20549D62D53FC1A980" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanEquitySecuritiesU.K.EquitiesAmount" xlink:label="loc_jll_DefinedBenefitPlanEquitySecuritiesU.K.EquitiesAmount_62EB253AD795CA9A7DE462D53FC173BD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanEquitySecuritiesU.K.EquitiesAmount_62EB253AD795CA9A7DE462D53FC173BD" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanEquitySecuritiesUKEquities" xlink:label="loc_jll_DefinedBenefitPlanEquitySecuritiesUKEquities_4D5C10F0DB8E633E611A62D53FC1A1F0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanEquitySecuritiesUKEquities_4D5C10F0DB8E633E611A62D53FC1A1F0" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanEquitySecuritiesNonU.K.EquitiesAmount" xlink:label="loc_jll_DefinedBenefitPlanEquitySecuritiesNonU.K.EquitiesAmount_A142BD4DB0966499F81762D53FC2E9B4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanEquitySecuritiesNonU.K.EquitiesAmount_A142BD4DB0966499F81762D53FC2E9B4" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanEquitySecuritiesNonUKEquities" xlink:label="loc_jll_DefinedBenefitPlanEquitySecuritiesNonUKEquities_DBB533D3C33C869C64AC62D53FC24DCA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanEquitySecuritiesNonUKEquities_DBB533D3C33C869C64AC62D53FC24DCA" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanDebtSecuritiesCorporateBondsAmount" xlink:label="loc_jll_DefinedBenefitPlanDebtSecuritiesCorporateBondsAmount_D546546F66DE4DB333B262D53FC29B3E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanDebtSecuritiesCorporateBondsAmount_D546546F66DE4DB333B262D53FC29B3E" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanCorporateBonds" xlink:label="loc_jll_DefinedBenefitPlanCorporateBonds_A43C2E4ABDE4EF60894062D53FC2B51A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanCorporateBonds_A43C2E4ABDE4EF60894062D53FC2B51A" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanDebtSecuritiesGovernmentandOtherDebtSecuritiesAmount" xlink:label="loc_jll_DefinedBenefitPlanDebtSecuritiesGovernmentandOtherDebtSecuritiesAmount_B2F5B394492902F5D5EA62D53FC2F8F3" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanDebtSecuritiesGovernmentandOtherDebtSecuritiesAmount_B2F5B394492902F5D5EA62D53FC2F8F3" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanGovernmentAndOtherDebtSecurities" xlink:label="loc_jll_DefinedBenefitPlanGovernmentAndOtherDebtSecurities_0400712BCBC0B8C6C67B62D53FC2ABBD" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanGovernmentAndOtherDebtSecurities_0400712BCBC0B8C6C67B62D53FC2ABBD" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanDebtSecuritiesCashandCashEquivalentsAmount" xlink:label="loc_jll_DefinedBenefitPlanDebtSecuritiesCashandCashEquivalentsAmount_EA20F56F7E57364AA00962D53FC221E4" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanDebtSecuritiesCashandCashEquivalentsAmount_EA20F56F7E57364AA00962D53FC221E4" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanCashandCashEquivalents" xlink:label="loc_jll_DefinedBenefitPlanCashandCashEquivalents_CC24A1F9D7736D6B2CC062D53FC202DD" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanCashandCashEquivalents_CC24A1F9D7736D6B2CC062D53FC202DD" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanDebtSecuritiesOtherAmount" xlink:label="loc_jll_DefinedBenefitPlanDebtSecuritiesOtherAmount_F69F9AA9D24BF3C972F362D53FC2D9BD" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanDebtSecuritiesOtherAmount_F69F9AA9D24BF3C972F362D53FC2D9BD" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanOther" xlink:label="loc_jll_DefinedBenefitPlanOther_FA5AE097F8FFA2304BD562D53FC27333" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_jll_DefinedBenefitPlanOther_FA5AE097F8FFA2304BD562D53FC27333" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_82735B3535B04E9E1D3A62D53FC2F042" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanInformationAboutPlanAssetsAbstract_68AB98A164D49F48F1DF62D53FC18454" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_82735B3535B04E9E1D3A62D53FC2F042" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4A360C5E58D4B158D1EA62D53FBDAEAD" xlink:to="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear_B2876FAF4C0C362E6F5F62D53FC317C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear_B2876FAF4C0C362E6F5F62D53FC317C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_4D6168678D69DDC18EAF62D53FC3C3B2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_4D6168678D69DDC18EAF62D53FC3C3B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_017DD5CB2B0422D2E48962D53FC34B39" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_017DD5CB2B0422D2E48962D53FC34B39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_78390D4A93CD9F94102762D53FC3C9B2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_78390D4A93CD9F94102762D53FC3C9B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_D8EC884D17F7123FA2AC62D53FC37DEE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_D8EC884D17F7123FA2AC62D53FC37DEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_7C553BB9B124DFC83BAA62D53FC359FB" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_7C553BB9B124DFC83BAA62D53FC359FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_99DA6D7A3B3B3719C98F62D53FC31975" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_99DA6D7A3B3B3719C98F62D53FC31975" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_DefinedBenefitPlanExpectedFutureBenefitPayments" xlink:label="loc_jll_DefinedBenefitPlanExpectedFutureBenefitPayments_7FF0B95601AA158CA41462D53FC392F9" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_jll_DefinedBenefitPlanExpectedFutureBenefitPayments_7FF0B95601AA158CA41462D53FC392F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_168ACBB762F2F67BA3E162D53FC365CB" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax_168ACBB762F2F67BA3E162D53FC365CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_B59A9EA7950A335C405762D53FC371D3" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax_B59A9EA7950A335C405762D53FC371D3" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_Othercomprehensiveincomelosspensionplansadjustmentforeigncurrencyexchangeratechanges" xlink:label="loc_jll_Othercomprehensiveincomelosspensionplansadjustmentforeigncurrencyexchangeratechanges_28F33579CAE5A4B72A5162D53FC3BA93" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_jll_Othercomprehensiveincomelosspensionplansadjustmentforeigncurrencyexchangeratechanges_28F33579CAE5A4B72A5162D53FC3BA93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_8B0EF783F498897B725962D53FC3A2C2" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_8B0EF783F498897B725962D53FC3A2C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_F8B3D23281B986A1DB6C62D53FC3829E" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_F8B3D23281B986A1DB6C62D53FC3829E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_DF179C25815D3078EB0B62D53FC4EEB7" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_4940D762E1CDD243AC2A62D53FC2796E" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_DF179C25815D3078EB0B62D53FC4EEB7" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/RetirementPlansTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/StockBasedCompensation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/StockBasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2566BFEC33174AB98A4B63F77A3CCEC6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DEF0A32072D042C8CEBE63F77A34EEE6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2566BFEC33174AB98A4B63F77A3CCEC6" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DEF0A32072D042C8CEBE63F77A34EEE6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_118994CE1F670DDCC6E763F77A3505DF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DEF0A32072D042C8CEBE63F77A34EEE6" xlink:to="loc_us-gaap_AwardTypeAxis_118994CE1F670DDCC6E763F77A3505DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AA3D8178A0D23CF9A83263F77A35E482_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_118994CE1F670DDCC6E763F77A3505DF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AA3D8178A0D23CF9A83263F77A35E482_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AA3D8178A0D23CF9A83263F77A35E482" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_118994CE1F670DDCC6E763F77A3505DF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AA3D8178A0D23CF9A83263F77A35E482" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockCompensationPlanMember" xlink:label="loc_us-gaap_StockCompensationPlanMember_4560B09A71CA6ACE78F663F77A355AD0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AA3D8178A0D23CF9A83263F77A35E482" xlink:to="loc_us-gaap_StockCompensationPlanMember_4560B09A71CA6ACE78F663F77A355AD0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_E2AE83A2752B145393F463F77A35A05B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AA3D8178A0D23CF9A83263F77A35E482" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_E2AE83A2752B145393F463F77A35A05B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_D7135DF1599137D4C11A63F77A35B424" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AA3D8178A0D23CF9A83263F77A35E482" xlink:to="loc_us-gaap_EmployeeStockOptionMember_D7135DF1599137D4C11A63F77A35B424" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis" xlink:label="loc_us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis_181598928FB587868DC763F77A3523DE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DEF0A32072D042C8CEBE63F77A34EEE6" xlink:to="loc_us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis_181598928FB587868DC763F77A3523DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeStockOwnershipPlanESOPPlanDomain" xlink:label="loc_us-gaap_EmployeeStockOwnershipPlanESOPPlanDomain_3CE4BFDA1111CAB1DA1863F77A361A0B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis_181598928FB587868DC763F77A3523DE" xlink:to="loc_us-gaap_EmployeeStockOwnershipPlanESOPPlanDomain_3CE4BFDA1111CAB1DA1863F77A361A0B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeStockOwnershipPlanESOPPlanDomain" xlink:label="loc_us-gaap_EmployeeStockOwnershipPlanESOPPlanDomain_3CE4BFDA1111CAB1DA1863F77A361A0B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EmployeeStockOwnershipPlanESOPDisclosuresByPlanAxis_181598928FB587868DC763F77A3523DE" xlink:to="loc_us-gaap_EmployeeStockOwnershipPlanESOPPlanDomain_3CE4BFDA1111CAB1DA1863F77A361A0B" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ShareBasedCompensationArrangementAwardTypeAxis" xlink:label="loc_jll_ShareBasedCompensationArrangementAwardTypeAxis_931148ADE2D715039CFF63F77A3B7BEF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DEF0A32072D042C8CEBE63F77A34EEE6" xlink:to="loc_jll_ShareBasedCompensationArrangementAwardTypeAxis_931148ADE2D715039CFF63F77A3B7BEF" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ShareBasedCompensationArrangementAwardTypeDomain" xlink:label="loc_jll_ShareBasedCompensationArrangementAwardTypeDomain_82E3154144C44C523B8B63F77A3B6B6E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_ShareBasedCompensationArrangementAwardTypeAxis_931148ADE2D715039CFF63F77A3B7BEF" xlink:to="loc_jll_ShareBasedCompensationArrangementAwardTypeDomain_82E3154144C44C523B8B63F77A3B6B6E_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ShareBasedCompensationArrangementAwardTypeDomain" xlink:label="loc_jll_ShareBasedCompensationArrangementAwardTypeDomain_82E3154144C44C523B8B63F77A3B6B6E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_ShareBasedCompensationArrangementAwardTypeAxis_931148ADE2D715039CFF63F77A3B7BEF" xlink:to="loc_jll_ShareBasedCompensationArrangementAwardTypeDomain_82E3154144C44C523B8B63F77A3B6B6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_64803F7EF0F4B53C259863F77A3BE721" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ShareBasedCompensationArrangementAwardTypeDomain_82E3154144C44C523B8B63F77A3B6B6E" xlink:to="loc_us-gaap_EmployeeStockOptionMember_64803F7EF0F4B53C259863F77A3BE721" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_EADDB4675B916CFA0D5863F77A3B1C46" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_ShareBasedCompensationArrangementAwardTypeDomain_82E3154144C44C523B8B63F77A3B6B6E" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_EADDB4675B916CFA0D5863F77A3B1C46" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_VestingPeriodAxis" xlink:label="loc_jll_VestingPeriodAxis_693F5A2507DD79FAFF5263F77A3B27A9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DEF0A32072D042C8CEBE63F77A34EEE6" xlink:to="loc_jll_VestingPeriodAxis_693F5A2507DD79FAFF5263F77A3B27A9" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_VestingPeriodDomain" xlink:label="loc_jll_VestingPeriodDomain_5593D28E003842EAED3B63F77A3C10B9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_VestingPeriodAxis_693F5A2507DD79FAFF5263F77A3B27A9" xlink:to="loc_jll_VestingPeriodDomain_5593D28E003842EAED3B63F77A3C10B9_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_VestingPeriodDomain" xlink:label="loc_jll_VestingPeriodDomain_5593D28E003842EAED3B63F77A3C10B9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_VestingPeriodAxis_693F5A2507DD79FAFF5263F77A3B27A9" xlink:to="loc_jll_VestingPeriodDomain_5593D28E003842EAED3B63F77A3C10B9" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_VestingPeriodOneMember" xlink:label="loc_jll_VestingPeriodOneMember_066A7DFFD0A4DA29133163F77A3CC0AC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_VestingPeriodDomain_5593D28E003842EAED3B63F77A3C10B9" xlink:to="loc_jll_VestingPeriodOneMember_066A7DFFD0A4DA29133163F77A3CC0AC" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_VestingPeriodTwoMember" xlink:label="loc_jll_VestingPeriodTwoMember_7DBEF53CE5AC2A32E4DC63F77A3CEDAA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_VestingPeriodDomain_5593D28E003842EAED3B63F77A3C10B9" xlink:to="loc_jll_VestingPeriodTwoMember_7DBEF53CE5AC2A32E4DC63F77A3CEDAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_782AC6DB8883DD7C254D63F77A3C76D8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_DEF0A32072D042C8CEBE63F77A34EEE6" xlink:to="loc_us-gaap_PlanNameAxis_782AC6DB8883DD7C254D63F77A3C76D8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_132DCEBE95B96FE828D063F77A3C80BA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_782AC6DB8883DD7C254D63F77A3C76D8" xlink:to="loc_us-gaap_PlanNameDomain_132DCEBE95B96FE828D063F77A3C80BA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_132DCEBE95B96FE828D063F77A3C80BA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_782AC6DB8883DD7C254D63F77A3C76D8" xlink:to="loc_us-gaap_PlanNameDomain_132DCEBE95B96FE828D063F77A3C80BA" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_JonesLangLasalleSavingsRelatedShareOptionPlanMember" xlink:label="loc_jll_JonesLangLasalleSavingsRelatedShareOptionPlanMember_28D9D64ECB73CF7F804063F77A3C2770" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_132DCEBE95B96FE828D063F77A3C80BA" xlink:to="loc_jll_JonesLangLasalleSavingsRelatedShareOptionPlanMember_28D9D64ECB73CF7F804063F77A3C2770" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_UKSaveAsYouEarnSayePlanMember" xlink:label="loc_jll_UKSaveAsYouEarnSayePlanMember_EC67844A81D64AE621B363F77A3C61A1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_132DCEBE95B96FE828D063F77A3C80BA" xlink:to="loc_jll_UKSaveAsYouEarnSayePlanMember_EC67844A81D64AE621B363F77A3C61A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_CDDF2CC611AB3D00EF0563F77A3C20BE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2566BFEC33174AB98A4B63F77A3CCEC6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_CDDF2CC611AB3D00EF0563F77A3C20BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_816AA869F6BA72A9A1DA63F77A3C4CDB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2566BFEC33174AB98A4B63F77A3CCEC6" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_816AA869F6BA72A9A1DA63F77A3C4CDB" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ShareBasedCompensationArrangementByShareBasedPaymentAwardSumOfAgePlusYearsOfServiceMinimum" xlink:label="loc_jll_ShareBasedCompensationArrangementByShareBasedPaymentAwardSumOfAgePlusYearsOfServiceMinimum_55A25B85FEE80C89A3D863F77A3C14E9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2566BFEC33174AB98A4B63F77A3CCEC6" xlink:to="loc_jll_ShareBasedCompensationArrangementByShareBasedPaymentAwardSumOfAgePlusYearsOfServiceMinimum_55A25B85FEE80C89A3D863F77A3C14E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_AA68EA5E2424FCDB0F2A63F77A3D9BB2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2566BFEC33174AB98A4B63F77A3CCEC6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_AA68EA5E2424FCDB0F2A63F77A3D9BB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_53CB5D5B87DB07D7DCA963F77A3DDFE8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_AA68EA5E2424FCDB0F2A63F77A3D9BB2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_53CB5D5B87DB07D7DCA963F77A3DDFE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_F78CCC0CA3585310F62563F77A3D35B5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_AA68EA5E2424FCDB0F2A63F77A3D9BB2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_F78CCC0CA3585310F62563F77A3D35B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6DF98B8558C10FDC641F63F77A421CE7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_AA68EA5E2424FCDB0F2A63F77A3D9BB2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_6DF98B8558C10FDC641F63F77A421CE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_6CA07C5E83BC6BB8508463F77A435CBD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_AA68EA5E2424FCDB0F2A63F77A3D9BB2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_6CA07C5E83BC6BB8508463F77A435CBD" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingNumber" xlink:label="loc_jll_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingNumber_428AFF48D8DB16431CA563F77A432A98" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_AA68EA5E2424FCDB0F2A63F77A3D9BB2" xlink:to="loc_jll_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingNumber_428AFF48D8DB16431CA563F77A432A98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2566BFEC33174AB98A4B63F77A3CCEC6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_C38006AD923C2DAFFBD563F77A4348C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_C38006AD923C2DAFFBD563F77A4348C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_54237ACED97858031B7B63F77A4325DF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_54237ACED97858031B7B63F77A4325DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9514C3B51D00EB6AE65B63F77A4312B1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_9514C3B51D00EB6AE65B63F77A4312B1" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_WeightedAverageGrantDateFairValueForfeitedInDollarPerShare" xlink:label="loc_jll_WeightedAverageGrantDateFairValueForfeitedInDollarPerShare_C438DCF2E2ADACE2238363F77A430A15" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_jll_WeightedAverageGrantDateFairValueForfeitedInDollarPerShare_C438DCF2E2ADACE2238363F77A430A15" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingWeightedAverageGrantDateFairValue" xlink:label="loc_jll_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingWeightedAverageGrantDateFairValue_AC847DF2D9DD72EB72D363F77A436C54" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_jll_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingWeightedAverageGrantDateFairValue_AC847DF2D9DD72EB72D363F77A436C54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_A9DF7C1A7228E140750863F77A43CC12" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_A9DF7C1A7228E140750863F77A43CC12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_6CB4D7217695CF219DD963F77A43E516" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_6CB4D7217695CF219DD963F77A43E516" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_427114E1E844B6B4A78E63F77A43C3A5" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_427114E1E844B6B4A78E63F77A43C3A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_39779FF30DC07E65F7E963F77A4311DC" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_39779FF30DC07E65F7E963F77A4311DC" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue1" xlink:label="loc_jll_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue1_371AFD7E525C23FB417763F77A4441D0" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_01007BA449B7D82D4CF163F77A4363A7" xlink:to="loc_jll_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue1_371AFD7E525C23FB417763F77A4441D0" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_OtherStockCompensationProgramsAbstract" xlink:label="loc_jll_OtherStockCompensationProgramsAbstract_4641D3006E64115B29B963F77A440F04" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_2566BFEC33174AB98A4B63F77A3CCEC6" xlink:to="loc_jll_OtherStockCompensationProgramsAbstract_4641D3006E64115B29B963F77A440F04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_41A5F73B8790AF91193363F77A447DB1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_OtherStockCompensationProgramsAbstract_4641D3006E64115B29B963F77A440F04" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate_41A5F73B8790AF91193363F77A447DB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_56A08723B13CD58492F563F77A44A22A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_OtherStockCompensationProgramsAbstract_4641D3006E64115B29B963F77A440F04" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_56A08723B13CD58492F563F77A44A22A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_99573474AEF0A337179A63F77A45914C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_OtherStockCompensationProgramsAbstract_4641D3006E64115B29B963F77A440F04" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod_99573474AEF0A337179A63F77A45914C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_164E2F5760E20E6BA8EC63F77A45AF80" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_OtherStockCompensationProgramsAbstract_4641D3006E64115B29B963F77A440F04" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_164E2F5760E20E6BA8EC63F77A45AF80" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_8C1F9D0809AAFF5102EE63F77A45C052" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_OtherStockCompensationProgramsAbstract_4641D3006E64115B29B963F77A440F04" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_8C1F9D0809AAFF5102EE63F77A45C052" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_D8992E39565672775D8E63F77A455323" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_OtherStockCompensationProgramsAbstract_4641D3006E64115B29B963F77A440F04" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_D8992E39565672775D8E63F77A455323" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_OtherStockCompensationProgramsOptionsOutstandingNumber" xlink:label="loc_jll_OtherStockCompensationProgramsOptionsOutstandingNumber_BC84AFD06A3DE187BAC863F77A453E8C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_OtherStockCompensationProgramsAbstract_4641D3006E64115B29B963F77A440F04" xlink:to="loc_jll_OtherStockCompensationProgramsOptionsOutstandingNumber_BC84AFD06A3DE187BAC863F77A453E8C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/StockBasedCompensationTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SubsequentEvents" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SubsequentEventsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_290F28C2528E9A2F36FE67A2F3595062" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_85D6037C96BE077B325A67A2F358B587" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_290F28C2528E9A2F36FE67A2F3595062" xlink:to="loc_us-gaap_SubsequentEventTable_85D6037C96BE077B325A67A2F358B587" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_B7049FBB3065E3C3EEB267A2F358D1BE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_85D6037C96BE077B325A67A2F358B587" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_B7049FBB3065E3C3EEB267A2F358D1BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4971BC1BF011E9AC790867A2F358080D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_B7049FBB3065E3C3EEB267A2F358D1BE" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4971BC1BF011E9AC790867A2F358080D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4971BC1BF011E9AC790867A2F358080D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_B7049FBB3065E3C3EEB267A2F358D1BE" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4971BC1BF011E9AC790867A2F358080D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_C6A71633A382398E538367A2F3595A7E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_4971BC1BF011E9AC790867A2F358080D" xlink:to="loc_us-gaap_SubsequentEventMember_C6A71633A382398E538367A2F3595A7E" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_MaximumPotentialPaymenttoAcquireBusiness" xlink:label="loc_jll_MaximumPotentialPaymenttoAcquireBusiness_2FE71ACB91E7342BDA3367A2F3593BB1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_290F28C2528E9A2F36FE67A2F3595062" xlink:to="loc_jll_MaximumPotentialPaymenttoAcquireBusiness_2FE71ACB91E7342BDA3367A2F3593BB1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SubsequentEventsSubsequentEventTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesAccountsReceivableDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_5613AB41F2683F12FF386DD3100A369E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_C390D3F3CDFD5B24C23C6DD3100A4F75" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_5613AB41F2683F12FF386DD3100A369E" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_C390D3F3CDFD5B24C23C6DD3100A4F75" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_5E2F50CDDAE16026EE636DD3100AC942" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_C390D3F3CDFD5B24C23C6DD3100A4F75" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_5E2F50CDDAE16026EE636DD3100AC942" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_6F35AF2B614580C2CC106DD3100A1252_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_5E2F50CDDAE16026EE636DD3100AC942" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_6F35AF2B614580C2CC106DD3100A1252_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_6F35AF2B614580C2CC106DD3100A1252" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_5E2F50CDDAE16026EE636DD3100AC942" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_6F35AF2B614580C2CC106DD3100A1252" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsCurrentMember" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsCurrentMember_463935441F5184A952686DD3100A5F93" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_6F35AF2B614580C2CC106DD3100A1252" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsCurrentMember_463935441F5184A952686DD3100A5F93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_5447C03DBF27FC2F56F26DD3100A27D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_5613AB41F2683F12FF386DD3100A369E" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_5447C03DBF27FC2F56F26DD3100A27D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_3062E4E1679E29FEDB256DD3100AC69E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_5613AB41F2683F12FF386DD3100A369E" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_3062E4E1679E29FEDB256DD3100AC69E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_973FE895DF6BB68856FE6DD3100A5DA6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_5613AB41F2683F12FF386DD3100A369E" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_973FE895DF6BB68856FE6DD3100A5DA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesReservesOfBusinessesAcquired" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesReservesOfBusinessesAcquired_1D8962850C32D958A2006DD3100A7A86" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_5613AB41F2683F12FF386DD3100A369E" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesReservesOfBusinessesAcquired_1D8962850C32D958A2006DD3100A7A86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ValuationAllowancesAndReservesAdjustments" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesAdjustments_2F3A70E0E8EAFF265FEB6DD3100B5C82" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_5613AB41F2683F12FF386DD3100A369E" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesAdjustments_2F3A70E0E8EAFF265FEB6DD3100B5C82" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_E361BD73F7FAD93B0CC66BB19F66213A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_04335ABB623FF5FAB8C36BB19F666A50" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_E361BD73F7FAD93B0CC66BB19F66213A" xlink:to="loc_us-gaap_StatementTable_04335ABB623FF5FAB8C36BB19F666A50" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_E9DB4692DA08B506A8016BB19F66916A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_04335ABB623FF5FAB8C36BB19F666A50" xlink:to="loc_us-gaap_AwardTypeAxis_E9DB4692DA08B506A8016BB19F66916A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_EB86E95F01E9972810FE6BB19F6615C1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_E9DB4692DA08B506A8016BB19F66916A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_EB86E95F01E9972810FE6BB19F6615C1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_EB86E95F01E9972810FE6BB19F6615C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_E9DB4692DA08B506A8016BB19F66916A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_EB86E95F01E9972810FE6BB19F6615C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_EDEAF8AB2C64056371B36BB19F66860A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_04335ABB623FF5FAB8C36BB19F666A50" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_EDEAF8AB2C64056371B36BB19F66860A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_856015ACBCDCE934432D6BB19F6651AE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_EDEAF8AB2C64056371B36BB19F66860A" xlink:to="loc_us-gaap_EquityComponentDomain_856015ACBCDCE934432D6BB19F6651AE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_856015ACBCDCE934432D6BB19F6651AE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_EDEAF8AB2C64056371B36BB19F66860A" xlink:to="loc_us-gaap_EquityComponentDomain_856015ACBCDCE934432D6BB19F6651AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_0E96337F6BD13E431DF36BB19F667514" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_856015ACBCDCE934432D6BB19F6651AE" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_0E96337F6BD13E431DF36BB19F667514" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_384B17D1F6A710B9F8B46BB19F664898" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_04335ABB623FF5FAB8C36BB19F666A50" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_384B17D1F6A710B9F8B46BB19F664898" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_3609BD579726E0BDD5726BB19F66977C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_384B17D1F6A710B9F8B46BB19F664898" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_3609BD579726E0BDD5726BB19F66977C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_3609BD579726E0BDD5726BB19F66977C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_384B17D1F6A710B9F8B46BB19F664898" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_3609BD579726E0BDD5726BB19F66977C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_SeniorNotesMember" xlink:label="loc_us-gaap_SeniorNotesMember_091AD6E0148C485591AC6BB19F66025A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_3609BD579726E0BDD5726BB19F66977C" xlink:to="loc_us-gaap_SeniorNotesMember_091AD6E0148C485591AC6BB19F66025A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_D1E8A0634FBC20A9BACF6BB19F66505B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_04335ABB623FF5FAB8C36BB19F666A50" xlink:to="loc_us-gaap_CreditFacilityAxis_D1E8A0634FBC20A9BACF6BB19F66505B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_A6880361B0B853BD6EB96BB19F6668A1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_D1E8A0634FBC20A9BACF6BB19F66505B" xlink:to="loc_us-gaap_CreditFacilityDomain_A6880361B0B853BD6EB96BB19F6668A1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_A6880361B0B853BD6EB96BB19F6668A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_D1E8A0634FBC20A9BACF6BB19F66505B" xlink:to="loc_us-gaap_CreditFacilityDomain_A6880361B0B853BD6EB96BB19F6668A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="loc_us-gaap_LineOfCreditMember_0762246AA43E79F568AA6BB19F66AF2F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_A6880361B0B853BD6EB96BB19F6668A1" xlink:to="loc_us-gaap_LineOfCreditMember_0762246AA43E79F568AA6BB19F66AF2F" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_NewAccountingStandardHypotheticalRetrospectiveAdjustment" xlink:label="loc_jll_NewAccountingStandardHypotheticalRetrospectiveAdjustment_CF9D0C2054A80AB060646BB19F663F0E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E361BD73F7FAD93B0CC66BB19F66213A" xlink:to="loc_jll_NewAccountingStandardHypotheticalRetrospectiveAdjustment_CF9D0C2054A80AB060646BB19F663F0E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_861C0647D24622F7205E6BB19F66E9EF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_E361BD73F7FAD93B0CC66BB19F66213A" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_861C0647D24622F7205E6BB19F66E9EF" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesPropertyPlantAndEquipmentDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_D8CBE2C0BE12161240465D3C9EE6887B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_E4321343F4F0624F4B965D3C9ED6A6CF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_D8CBE2C0BE12161240465D3C9EE6887B" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_E4321343F4F0624F4B965D3C9ED6A6CF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_576467C89C73D5E0C7765D3C9EDCCAF2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_E4321343F4F0624F4B965D3C9ED6A6CF" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_576467C89C73D5E0C7765D3C9EDCCAF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_57ECFF3900EE4BE2BDDD5D3C9EDC0136_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_576467C89C73D5E0C7765D3C9EDCCAF2" xlink:to="loc_us-gaap_EquityComponentDomain_57ECFF3900EE4BE2BDDD5D3C9EDC0136_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_57ECFF3900EE4BE2BDDD5D3C9EDC0136" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_576467C89C73D5E0C7765D3C9EDCCAF2" xlink:to="loc_us-gaap_EquityComponentDomain_57ECFF3900EE4BE2BDDD5D3C9EDC0136" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_3BC009B667FAD171D9925D3C9EDC1544" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_57ECFF3900EE4BE2BDDD5D3C9EDC0136" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_3BC009B667FAD171D9925D3C9EDC1544" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_4126B77678B2E0AF59165D3C9EDEB89B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_E4321343F4F0624F4B965D3C9ED6A6CF" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_4126B77678B2E0AF59165D3C9EDEB89B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3ECCD334465F17A77B555D3C9EDE95EB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_4126B77678B2E0AF59165D3C9EDEB89B" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3ECCD334465F17A77B555D3C9EDE95EB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3ECCD334465F17A77B555D3C9EDE95EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_4126B77678B2E0AF59165D3C9EDEB89B" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3ECCD334465F17A77B555D3C9EDE95EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_FAC1512E20F2E5AF6BA45D3C9EDFB90C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3ECCD334465F17A77B555D3C9EDE95EB" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_FAC1512E20F2E5AF6BA45D3C9EDFB90C" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_ComputerEquipmentAndSoftwareMember" xlink:label="loc_jll_ComputerEquipmentAndSoftwareMember_EF3F2D6082B2D2F699CA5D3C9EE02AE7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3ECCD334465F17A77B555D3C9EDE95EB" xlink:to="loc_jll_ComputerEquipmentAndSoftwareMember_EF3F2D6082B2D2F699CA5D3C9EE02AE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_B7AB72389C29D633D1E75D3C9EE15D58" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3ECCD334465F17A77B555D3C9EDE95EB" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_B7AB72389C29D633D1E75D3C9EE15D58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AutomobilesMember" xlink:label="loc_us-gaap_AutomobilesMember_ADB0C66E672429BF00F65D3C9EE183F5" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3ECCD334465F17A77B555D3C9EDE95EB" xlink:to="loc_us-gaap_AutomobilesMember_ADB0C66E672429BF00F65D3C9EE183F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_3BE813B26AC74C2648C75D3C9EE11FAB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_E4321343F4F0624F4B965D3C9ED6A6CF" xlink:to="loc_us-gaap_RangeAxis_3BE813B26AC74C2648C75D3C9EE11FAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_1CF57D37A0B062A0F21A5D3C9EE11676_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_3BE813B26AC74C2648C75D3C9EE11FAB" xlink:to="loc_us-gaap_RangeMember_1CF57D37A0B062A0F21A5D3C9EE11676_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_1CF57D37A0B062A0F21A5D3C9EE11676" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_3BE813B26AC74C2648C75D3C9EE11FAB" xlink:to="loc_us-gaap_RangeMember_1CF57D37A0B062A0F21A5D3C9EE11676" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_6E89D0B72420BAF4B8C15D3C9EE1B645" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_1CF57D37A0B062A0F21A5D3C9EE11676" xlink:to="loc_us-gaap_MinimumMember_6E89D0B72420BAF4B8C15D3C9EE1B645" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_B4AEBE552FF0B3B3416E5D3C9EE1ABFC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_1CF57D37A0B062A0F21A5D3C9EE11676" xlink:to="loc_us-gaap_MaximumMember_B4AEBE552FF0B3B3416E5D3C9EE1ABFC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_F673B6AE6F331A21580C5D3C9EE795B5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_D8CBE2C0BE12161240465D3C9EE6887B" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_F673B6AE6F331A21580C5D3C9EE795B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_2603E822AEE5E4BF53B55D3C9EE70CCF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_D8CBE2C0BE12161240465D3C9EE6887B" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_2603E822AEE5E4BF53B55D3C9EE70CCF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_F4194FA2C6C0D207F4C75D3C9EE769CD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_D8CBE2C0BE12161240465D3C9EE6887B" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_F4194FA2C6C0D207F4C75D3C9EE769CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_665C02F8587F440D56B25D3C9EE7CE76" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_D8CBE2C0BE12161240465D3C9EE6887B" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_665C02F8587F440D56B25D3C9EE7CE76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_19EB9D2EB8804A637E985D3C9EE7CBEB" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_D8CBE2C0BE12161240465D3C9EE6887B" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_19EB9D2EB8804A637E985D3C9EE7CBEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_2E58EC4D421B68D9798B5D3C9EE9C946" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_D8CBE2C0BE12161240465D3C9EE6887B" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_2E58EC4D421B68D9798B5D3C9EE9C946" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/SummaryOfSignificantAccountingPoliciesWarehouseReceivablesAndFacilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_1DBB88C4A5B7E12212884CD5143F32AB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_B34444209B40F5BA915C4CD5143F1752" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_1DBB88C4A5B7E12212884CD5143F32AB" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_B34444209B40F5BA915C4CD5143F1752" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineOfCreditFacilityByTypeAxis" xlink:label="loc_jll_LineOfCreditFacilityByTypeAxis_E19944FB5422CE624EE14CD5143F0E90" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_B34444209B40F5BA915C4CD5143F1752" xlink:to="loc_jll_LineOfCreditFacilityByTypeAxis_E19944FB5422CE624EE14CD5143F0E90" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineOfCreditFacilityByTypeDomain" xlink:label="loc_jll_LineOfCreditFacilityByTypeDomain_4F03072286B4325EC8F24CD5143F1BB2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_LineOfCreditFacilityByTypeAxis_E19944FB5422CE624EE14CD5143F0E90" xlink:to="loc_jll_LineOfCreditFacilityByTypeDomain_4F03072286B4325EC8F24CD5143F1BB2_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LineOfCreditFacilityByTypeDomain" xlink:label="loc_jll_LineOfCreditFacilityByTypeDomain_4F03072286B4325EC8F24CD5143F1BB2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_LineOfCreditFacilityByTypeAxis_E19944FB5422CE624EE14CD5143F0E90" xlink:to="loc_jll_LineOfCreditFacilityByTypeDomain_4F03072286B4325EC8F24CD5143F1BB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_C4B341C02A6C10DA1F914CD5143F0E4B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_1DBB88C4A5B7E12212884CD5143F32AB" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_C4B341C02A6C10DA1F914CD5143F0E4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_B7B685CB459B79EC45564CD5143F64ED" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_1DBB88C4A5B7E12212884CD5143F32AB" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_B7B685CB459B79EC45564CD5143F64ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_DD3DFCC876FA871B2CC64CD5143FE729" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_1DBB88C4A5B7E12212884CD5143F32AB" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_DD3DFCC876FA871B2CC64CD5143FE729" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/TransactionsWithAffiliates" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/TransactionsWithAffiliatesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_CAFB397FA91A64EDCF9B6DD310BDC120" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_76353176521306160D006DD310BCE5D1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_CAFB397FA91A64EDCF9B6DD310BDC120" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_76353176521306160D006DD310BCE5D1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_B6683C9DBAE4B0B574D66DD310BC5AC8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_76353176521306160D006DD310BCE5D1" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_B6683C9DBAE4B0B574D66DD310BC5AC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_F8DC7771CC5026DAB8216DD310BC67A0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_B6683C9DBAE4B0B574D66DD310BC5AC8" xlink:to="loc_us-gaap_RelatedPartyDomain_F8DC7771CC5026DAB8216DD310BC67A0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_F8DC7771CC5026DAB8216DD310BC67A0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_B6683C9DBAE4B0B574D66DD310BC5AC8" xlink:to="loc_us-gaap_RelatedPartyDomain_F8DC7771CC5026DAB8216DD310BC67A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_EquityMethodInvesteeMember" xlink:label="loc_us-gaap_EquityMethodInvesteeMember_734BD8D388B81708CC486DD310BD8EC0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_F8DC7771CC5026DAB8216DD310BC67A0" xlink:to="loc_us-gaap_EquityMethodInvesteeMember_734BD8D388B81708CC486DD310BD8EC0" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_EmployeesMember" xlink:label="loc_jll_EmployeesMember_19675E8DC07A4BD6497E6DD310BD9B1B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_F8DC7771CC5026DAB8216DD310BC67A0" xlink:to="loc_jll_EmployeesMember_19675E8DC07A4BD6497E6DD310BD9B1B" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RelatedPartyTransactionsNatureOfTransactionAxis" xlink:label="loc_jll_RelatedPartyTransactionsNatureOfTransactionAxis_978736FDAB973066DC736DD310BDF832" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_76353176521306160D006DD310BCE5D1" xlink:to="loc_jll_RelatedPartyTransactionsNatureOfTransactionAxis_978736FDAB973066DC736DD310BDF832" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RelatedPartyTransactionNatureOfTransactionDomain" xlink:label="loc_jll_RelatedPartyTransactionNatureOfTransactionDomain_2B778F22CDE39D235DBC6DD310BD748C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_jll_RelatedPartyTransactionsNatureOfTransactionAxis_978736FDAB973066DC736DD310BDF832" xlink:to="loc_jll_RelatedPartyTransactionNatureOfTransactionDomain_2B778F22CDE39D235DBC6DD310BD748C_default" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_RelatedPartyTransactionNatureOfTransactionDomain" xlink:label="loc_jll_RelatedPartyTransactionNatureOfTransactionDomain_2B778F22CDE39D235DBC6DD310BD748C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_jll_RelatedPartyTransactionsNatureOfTransactionAxis_978736FDAB973066DC736DD310BDF832" xlink:to="loc_jll_RelatedPartyTransactionNatureOfTransactionDomain_2B778F22CDE39D235DBC6DD310BD748C" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_LoansRelatedToCoInvestmentsMember" xlink:label="loc_jll_LoansRelatedToCoInvestmentsMember_73D1A374195AF55A997F6DD310BD3469" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_RelatedPartyTransactionNatureOfTransactionDomain_2B778F22CDE39D235DBC6DD310BD748C" xlink:to="loc_jll_LoansRelatedToCoInvestmentsMember_73D1A374195AF55A997F6DD310BD3469" xlink:type="arc" />
    <link:loc xlink:href="jll-20161231.xsd#jll_TravelRelocationAndOtherMiscellaneousAdvancesMember" xlink:label="loc_jll_TravelRelocationAndOtherMiscellaneousAdvancesMember_8DED40B11A3033EB2A756DD310BDA0D5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_jll_RelatedPartyTransactionNatureOfTransactionDomain_2B778F22CDE39D235DBC6DD310BD748C" xlink:to="loc_jll_TravelRelocationAndOtherMiscellaneousAdvancesMember_8DED40B11A3033EB2A756DD310BDA0D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_RevenueFromRelatedParties" xlink:label="loc_us-gaap_RevenueFromRelatedParties_0109828AE9C4EAEFA2EA6DD310BDCB2B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_CAFB397FA91A64EDCF9B6DD310BDC120" xlink:to="loc_us-gaap_RevenueFromRelatedParties_0109828AE9C4EAEFA2EA6DD310BDCB2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DueFromRelatedParties" xlink:label="loc_us-gaap_DueFromRelatedParties_8A519D73BC4043FF74306DD310BDCEAA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_CAFB397FA91A64EDCF9B6DD310BDC120" xlink:to="loc_us-gaap_DueFromRelatedParties_8A519D73BC4043FF74306DD310BDCEAA" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.us.amjoneslanglasalle.com/role/TransactionsWithAffiliatesTables" xlink:type="extended" />
</link:linkbase>
