<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva, formerly WebFilings-->
<!-- -->
<linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns="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">
  <roleRef roleURI="http://www.interpublic.com/role/AccruedLiabilitiesDetails" xlink:href="ipg-20141231.xsd#AccruedLiabilitiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/AccumulatedOtherComprehensiveLossNetOfTaxChangesInAociDetails" xlink:href="ipg-20141231.xsd#AccumulatedOtherComprehensiveLossNetOfTaxChangesInAociDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/AccumulatedOtherComprehensiveLossNetOfTaxNotes" xlink:href="ipg-20141231.xsd#AccumulatedOtherComprehensiveLossNetOfTaxNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/AccumulatedOtherComprehensiveLossNetOfTaxReclassificationsFromAociNetOfTaxDetails" xlink:href="ipg-20141231.xsd#AccumulatedOtherComprehensiveLossNetOfTaxReclassificationsFromAociNetOfTaxDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/AccumulatedOtherComprehensiveLossNetOfTaxTables" xlink:href="ipg-20141231.xsd#AccumulatedOtherComprehensiveLossNetOfTaxTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/AcquisitionsCashPaidForAcquisitionsDetails" xlink:href="ipg-20141231.xsd#AcquisitionsCashPaidForAcquisitionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/AcquisitionsNarrativeDetails" xlink:href="ipg-20141231.xsd#AcquisitionsNarrativeDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/AcquisitionsNotes" xlink:href="ipg-20141231.xsd#AcquisitionsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/AcquisitionsTables" xlink:href="ipg-20141231.xsd#AcquisitionsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/AntidilutiveSharesDetails" xlink:href="ipg-20141231.xsd#AntidilutiveSharesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/CommitmentsAndContingenciesNetRentExpenseDetails" xlink:href="ipg-20141231.xsd#CommitmentsAndContingenciesNetRentExpenseDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/CommitmentsAndContingenciesNotes" xlink:href="ipg-20141231.xsd#CommitmentsAndContingenciesNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/CommitmentsAndContingenciesTables" xlink:href="ipg-20141231.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ComponentsOfDeferredTaxAssetsDetails" xlink:href="ipg-20141231.xsd#ComponentsOfDeferredTaxAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ComponentsOfIncomeBeforeIncomeTaxesDetails" xlink:href="ipg-20141231.xsd#ComponentsOfIncomeBeforeIncomeTaxesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ConsolidatedBalanceSheets" xlink:href="ipg-20141231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="ipg-20141231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="ipg-20141231.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ConsolidatedStatementsOfOperations" xlink:href="ipg-20141231.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="ipg-20141231.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ContingentAcquisitionObligationsDetails" xlink:href="ipg-20141231.xsd#ContingentAcquisitionObligationsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/DebtAndCreditAgreementsAnnualMaturitiesDetails" xlink:href="ipg-20141231.xsd#DebtAndCreditAgreementsAnnualMaturitiesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/DebtAndCreditAgreementsConvertibleNotesDetails" xlink:href="ipg-20141231.xsd#DebtAndCreditAgreementsConvertibleNotesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/DebtAndCreditAgreementsCreditFacilityDetails" xlink:href="ipg-20141231.xsd#DebtAndCreditAgreementsCreditFacilityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/DebtAndCreditAgreementsExtinguishmentOfDebtDetails" xlink:href="ipg-20141231.xsd#DebtAndCreditAgreementsExtinguishmentOfDebtDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/DebtAndCreditAgreementsLongTermDebtDetails" xlink:href="ipg-20141231.xsd#DebtAndCreditAgreementsLongTermDebtDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/DebtAndCreditAgreementsNarrativeDetails" xlink:href="ipg-20141231.xsd#DebtAndCreditAgreementsNarrativeDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/DebtAndCreditAgreementsNotes" xlink:href="ipg-20141231.xsd#DebtAndCreditAgreementsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/DebtAndCreditAgreementsTables" xlink:href="ipg-20141231.xsd#DebtAndCreditAgreementsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/DocumentAndEntityInformationDocument" xlink:href="ipg-20141231.xsd#DocumentAndEntityInformationDocument" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/EarningsPerShareBasicAndDilutedDetails" xlink:href="ipg-20141231.xsd#EarningsPerShareBasicAndDilutedDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/EarningsPerShareNotes" xlink:href="ipg-20141231.xsd#EarningsPerShareNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/EarningsPerShareTables" xlink:href="ipg-20141231.xsd#EarningsPerShareTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/EmployeeBenefitsAllocationOfPlanAssetsDetails" xlink:href="ipg-20141231.xsd#EmployeeBenefitsAllocationOfPlanAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/EmployeeBenefitsDetails" xlink:href="ipg-20141231.xsd#EmployeeBenefitsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/EmployeeBenefitsNotes" xlink:href="ipg-20141231.xsd#EmployeeBenefitsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/FairValueMeasurementsNotes" xlink:href="ipg-20141231.xsd#FairValueMeasurementsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/FairValueMeasurementsTables" xlink:href="ipg-20141231.xsd#FairValueMeasurementsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/FairValueOfPensionPlanAssetsDetails" xlink:href="ipg-20141231.xsd#FairValueOfPensionPlanAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/FairValueOnNonrecurringBasisDetails" xlink:href="ipg-20141231.xsd#FairValueOnNonrecurringBasisDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/FairValueOnRecurringBasisDetails" xlink:href="ipg-20141231.xsd#FairValueOnRecurringBasisDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/FairValueUnobservableInputsDetails" xlink:href="ipg-20141231.xsd#FairValueUnobservableInputsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/FutureMinimumLeasePaymentsDetails" xlink:href="ipg-20141231.xsd#FutureMinimumLeasePaymentsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/GoodwillDetails" xlink:href="ipg-20141231.xsd#GoodwillDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/GuaranteesDetails" xlink:href="ipg-20141231.xsd#GuaranteesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/IncentiveCompensationPlansEmployeeStockPurchasePlansDetails" xlink:href="ipg-20141231.xsd#IncentiveCompensationPlansEmployeeStockPurchasePlansDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/IncentiveCompensationPlansNotes" xlink:href="ipg-20141231.xsd#IncentiveCompensationPlansNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/IncentiveCompensationPlansStockOptionActivityDetails" xlink:href="ipg-20141231.xsd#IncentiveCompensationPlansStockOptionActivityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/IncentiveCompensationPlansTables" xlink:href="ipg-20141231.xsd#IncentiveCompensationPlansTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/IncomeTaxesChangeInValuationAllowancesDetails" xlink:href="ipg-20141231.xsd#IncomeTaxesChangeInValuationAllowancesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/IncomeTaxesTables" xlink:href="ipg-20141231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/IntangibleAssets" xlink:href="ipg-20141231.xsd#IntangibleAssets" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/IntangibleAssetsTables" xlink:href="ipg-20141231.xsd#IntangibleAssetsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/NetPeriodicCostDetails" xlink:href="ipg-20141231.xsd#NetPeriodicCostDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/NonVestedAwardActivityDetails" xlink:href="ipg-20141231.xsd#NonVestedAwardActivityDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/Notes" xlink:href="ipg-20141231.xsd#Notes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/OperationsDetails" xlink:href="ipg-20141231.xsd#OperationsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/OtherExpenseIncomeNetDetails" xlink:href="ipg-20141231.xsd#OtherExpenseIncomeNetDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/OtherIntangibleAssetsDetails" xlink:href="ipg-20141231.xsd#OtherIntangibleAssetsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/Parenthetical" xlink:href="ipg-20141231.xsd#Parenthetical" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/PensionAndPostretirementBenefitObligationDetails" xlink:href="ipg-20141231.xsd#PensionAndPostretirementBenefitObligationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/PensionCashFlowsDetails" xlink:href="ipg-20141231.xsd#PensionCashFlowsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/PlanInformationDetails" xlink:href="ipg-20141231.xsd#PlanInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ProvisionForIncomeTaxesDetails" xlink:href="ipg-20141231.xsd#ProvisionForIncomeTaxesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/RecentAccountingStandardsNotes" xlink:href="ipg-20141231.xsd#RecentAccountingStandardsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ReconciliationOfEffectiveIncomeTaxRateDetails" xlink:href="ipg-20141231.xsd#ReconciliationOfEffectiveIncomeTaxRateDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/RedeemableNoncontrollingInterestsDetails" xlink:href="ipg-20141231.xsd#RedeemableNoncontrollingInterestsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/RestructuringAndOtherReorganizationRelatedChargesReversalsNetDetails" xlink:href="ipg-20141231.xsd#RestructuringAndOtherReorganizationRelatedChargesReversalsNetDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/RestructuringAndOtherReorganizationRelatedChargesReversalsNetNotes" xlink:href="ipg-20141231.xsd#RestructuringAndOtherReorganizationRelatedChargesReversalsNetNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/RestructuringAndOtherReorganizationRelatedChargesReversalsNetTables" xlink:href="ipg-20141231.xsd#RestructuringAndOtherReorganizationRelatedChargesReversalsNetTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ResultsByQuarterUnauditedDetails" xlink:href="ipg-20141231.xsd#ResultsByQuarterUnauditedDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ResultsByQuarterUnauditedNotes" xlink:href="ipg-20141231.xsd#ResultsByQuarterUnauditedNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ResultsByQuarterUnauditedTables" xlink:href="ipg-20141231.xsd#ResultsByQuarterUnauditedTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SavingsPlansDetails" xlink:href="ipg-20141231.xsd#SavingsPlansDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SegmentInformationMajorGeographicAreaDetails" xlink:href="ipg-20141231.xsd#SegmentInformationMajorGeographicAreaDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SegmentInformationNotes" xlink:href="ipg-20141231.xsd#SegmentInformationNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SegmentInformationTables" xlink:href="ipg-20141231.xsd#SegmentInformationTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ShareBasedCompensationAwardsDetails" xlink:href="ipg-20141231.xsd#ShareBasedCompensationAwardsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ShareRepurchaseProgramDetails" xlink:href="ipg-20141231.xsd#ShareRepurchaseProgramDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/StockBasedCompensationExpenseDetails" xlink:href="ipg-20141231.xsd#StockBasedCompensationExpenseDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/StockOptionValuationAssumptionsDetails" xlink:href="ipg-20141231.xsd#StockOptionValuationAssumptionsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SubsequentEventsDetails" xlink:href="ipg-20141231.xsd#SubsequentEventsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SubsequentEventsNotes" xlink:href="ipg-20141231.xsd#SubsequentEventsNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SubsequentEventsTables" xlink:href="ipg-20141231.xsd#SubsequentEventsTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesAccountsPayablePolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesAccountsPayablePolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesAllowanceForDoubtfulAccountsPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesAllowanceForDoubtfulAccountsPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesCashAndCashEquivalentsPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesCashAndCashEquivalentsPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesDerivativesPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesDerivativesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesDetails" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesEarningsPerSharePolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesEarningsPerSharePolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesExpendituresBillableToClientsPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesExpendituresBillableToClientsPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesForeignCurrenciesPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesForeignCurrenciesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesGoodwillAndOtherIntangibleAssetsPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesGoodwillAndOtherIntangibleAssetsPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesIncomeTaxesPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesIncomeTaxesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesInvestmentsPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesInvestmentsPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesNotes" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesPensionAndPostretirementBenefitsPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesPensionAndPostretirementBenefitsPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesPrinciplesOfConsolidationPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesPrinciplesOfConsolidationPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesPropertyAndEquipmentPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesPropertyAndEquipmentPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesReclassificationsPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesReclassificationsPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesRedeemableNoncontrollingInterestsPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesRedeemableNoncontrollingInterestsPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesRevenueRecognitionPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesRevenueRecognitionPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesShortTermMarketableSecuritiesPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesShortTermMarketableSecuritiesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesStockBasedCompensationPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesStockBasedCompensationPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesTreasuryStockPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesTreasuryStockPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesUseOfEstimatesPolicies" xlink:href="ipg-20141231.xsd#SummaryOfSignificantAccountingPoliciesUseOfEstimatesPolicies" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SupplementalCashFlowInformationDetails" xlink:href="ipg-20141231.xsd#SupplementalCashFlowInformationDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SupplementaryDataNotes" xlink:href="ipg-20141231.xsd#SupplementaryDataNotes" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SupplementaryDataPropertyAndEquipmentDetails" xlink:href="ipg-20141231.xsd#SupplementaryDataPropertyAndEquipmentDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/SupplementaryDataTables" xlink:href="ipg-20141231.xsd#SupplementaryDataTables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/Tables" xlink:href="ipg-20141231.xsd#Tables" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/UnrecognizedTaxBenefitsDetails" xlink:href="ipg-20141231.xsd#UnrecognizedTaxBenefitsDetails" xlink:type="simple" />
  <roleRef roleURI="http://www.interpublic.com/role/ValuationAndQualifyingAccountsAllowanceForUncollectibleAccountsReceivableDetails" xlink:href="ipg-20141231.xsd#ValuationAndQualifyingAccountsAllowanceForUncollectibleAccountsReceivableDetails" xlink:type="simple" />
  <arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <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" />
  <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" />
  <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" />
  <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" />
  <definitionLink xlink:role="http://www.interpublic.com/role/AccruedLiabilitiesDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/AccumulatedOtherComprehensiveLossNetOfTaxChangesInAociDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4470026C29E91647468DB46E4E5C32AB" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4470026C29E91647468DB46E4E5C32AB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_F3A9FECF4007440BBA3FB470343C8E35" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_4470026C29E91647468DB46E4E5C32AB" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_F3A9FECF4007440BBA3FB470343C8E35" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_FCAC2C299BE4CF253630B470343C120E_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_F3A9FECF4007440BBA3FB470343C8E35" xlink:to="loc_us-gaap_EquityComponentDomain_FCAC2C299BE4CF253630B470343C120E_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_FCAC2C299BE4CF253630B470343C120E" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_F3A9FECF4007440BBA3FB470343C8E35" xlink:to="loc_us-gaap_EquityComponentDomain_FCAC2C299BE4CF253630B470343C120E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignCurrencyGainLossMember" xlink:label="loc_us-gaap_ForeignCurrencyGainLossMember_2952523A360F34A24F00B4708E7C610A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_FCAC2C299BE4CF253630B470343C120E" xlink:to="loc_us-gaap_ForeignCurrencyGainLossMember_2952523A360F34A24F00B4708E7C610A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableforsaleSecuritiesMember" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesMember_7A8CCEE482F24B2745C7B471788ACFF6" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_FCAC2C299BE4CF253630B470343C120E" xlink:to="loc_us-gaap_AvailableforsaleSecuritiesMember_7A8CCEE482F24B2745C7B471788ACFF6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DerivativeMember" xlink:label="loc_us-gaap_DerivativeMember_C711CAA4B4A172B9C587B4724FC9671A" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_FCAC2C299BE4CF253630B470343C120E" xlink:to="loc_us-gaap_DerivativeMember_C711CAA4B4A172B9C587B4724FC9671A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_11DB7C8EF936DF23D72BB4734EA0212A" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_FCAC2C299BE4CF253630B470343C120E" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_11DB7C8EF936DF23D72BB4734EA0212A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_3BB4F7E30AC86323CBB8B46E4F17240A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_3BB4F7E30AC86323CBB8B46E4F17240A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax_ED3913DB1AE0FDAEC951B46E4FD30FF2" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax_ED3913DB1AE0FDAEC951B46E4FD30FF2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_035044204F786707C9C9B46E4E7B89D4" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_035044204F786707C9C9B46E4E7B89D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_226BBFDC606CE6E66258B46E4F3704D4" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax_226BBFDC606CE6E66258B46E4F3704D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_9FE705C8F0D326B07BE2B46E4E9AD3E3" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_9FE705C8F0D326B07BE2B46E4E9AD3E3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_EDF3E3A7F9B5D3A21864B46E5031483C" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_EDF3E3A7F9B5D3A21864B46E5031483C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_662C7F55DB794F2CDD20B46E4F56F8F5" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax_662C7F55DB794F2CDD20B46E4F56F8F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet_943AC657B445FF3F63BEB46E508FB9B0" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet_943AC657B445FF3F63BEB46E508FB9B0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_C6838E834023A3EAF57FB46E4EBA5EB1" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_C6838E834023A3EAF57FB46E4EBA5EB1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax_44A9A3605E2464073642B46E4F75E051" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax_44A9A3605E2464073642B46E4F75E051" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_5122EC489B0EB6B1621DB46E50EC787D" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_5122EC489B0EB6B1621DB46E50EC787D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_3D8FB22D2C6D123AA1EDB46E4ED98A5A" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax_3D8FB22D2C6D123AA1EDB46E4ED98A5A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_8F6A101DE2D0251D1214B46E4F948270" xlink:type="locator" />
    <definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_8F6A101DE2D0251D1214B46E4F948270" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_TotalReclassificationfromAOCI" xlink:label="loc_ipg_TotalReclassificationfromAOCI_F1F4BA02B240D386C9CAB46E514AF611" xlink:type="locator" />
    <definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_ipg_TotalReclassificationfromAOCI_F1F4BA02B240D386C9CAB46E514AF611" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_70C5D54DCE4A4C7EA7C0B46E4EE99BB4" xlink:type="locator" />
    <definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_B3BDD9A177BB9577788EB46E4E5C3F87" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_70C5D54DCE4A4C7EA7C0B46E4EE99BB4" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/AccumulatedOtherComprehensiveLossNetOfTaxNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/AccumulatedOtherComprehensiveLossNetOfTaxReclassificationsFromAociNetOfTaxDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_D161FE80EE94B77E2527B47A2686EF2F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_425790FBF5820B2E24A8B47A26852C48" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_D161FE80EE94B77E2527B47A2686EF2F" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_425790FBF5820B2E24A8B47A26852C48" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_F6A435D7BC5C54857990B47A2685439F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_425790FBF5820B2E24A8B47A26852C48" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_F6A435D7BC5C54857990B47A2685439F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_FE435A9774B7693A8281B47A26855990_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_F6A435D7BC5C54857990B47A2685439F" xlink:to="loc_us-gaap_EquityComponentDomain_FE435A9774B7693A8281B47A26855990_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_FE435A9774B7693A8281B47A26855990" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_F6A435D7BC5C54857990B47A2685439F" xlink:to="loc_us-gaap_EquityComponentDomain_FE435A9774B7693A8281B47A26855990" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignCurrencyGainLossMember" xlink:label="loc_us-gaap_ForeignCurrencyGainLossMember_C8BC1528239D4F12C67CB47A26869AF2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_FE435A9774B7693A8281B47A26855990" xlink:to="loc_us-gaap_ForeignCurrencyGainLossMember_C8BC1528239D4F12C67CB47A26869AF2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableforsaleSecuritiesMember" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesMember_1A50C882CEED49AB12C7B47A2686B207" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_FE435A9774B7693A8281B47A26855990" xlink:to="loc_us-gaap_AvailableforsaleSecuritiesMember_1A50C882CEED49AB12C7B47A2686B207" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DerivativeMember" xlink:label="loc_us-gaap_DerivativeMember_45804E176DF747B7E82EB47A26863EBC" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_FE435A9774B7693A8281B47A26855990" xlink:to="loc_us-gaap_DerivativeMember_45804E176DF747B7E82EB47A26863EBC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D87EC9527306AA1AF5CEB47A2686B7B8" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_FE435A9774B7693A8281B47A26855990" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_D87EC9527306AA1AF5CEB47A2686B7B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_CC3CF82EC22079941FF9B47A2686192F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_D161FE80EE94B77E2527B47A2686EF2F" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_CC3CF82EC22079941FF9B47A2686192F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_638E404E66AE43EB76EBB47A26864BAA" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_D161FE80EE94B77E2527B47A2686EF2F" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_638E404E66AE43EB76EBB47A26864BAA" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_TotalReclassificationfromAOCI" xlink:label="loc_ipg_TotalReclassificationfromAOCI_5AEC8D8806124275CAB8B47A26860E39" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_D161FE80EE94B77E2527B47A2686EF2F" xlink:to="loc_ipg_TotalReclassificationfromAOCI_5AEC8D8806124275CAB8B47A26860E39" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/AccumulatedOtherComprehensiveLossNetOfTaxTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/AcquisitionsCashPaidForAcquisitionsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_736923C146DC2BE98795B2852A7F640C" xlink:type="locator" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ScheduleOfCashPaidForCurrentAndPriorYearsAcquisitionsTable" xlink:label="loc_ipg_ScheduleOfCashPaidForCurrentAndPriorYearsAcquisitionsTable_8081E1D9A4C468362745B27FECE739BA" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_736923C146DC2BE98795B2852A7F640C" xlink:to="loc_ipg_ScheduleOfCashPaidForCurrentAndPriorYearsAcquisitionsTable_8081E1D9A4C468362745B27FECE739BA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="ipg-20141231.xsd#ipg_AcquisitionsTypeAxis" xlink:label="loc_ipg_AcquisitionsTypeAxis_7FB9AFE759FE84E56D79B288F6A96A68" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ipg_ScheduleOfCashPaidForCurrentAndPriorYearsAcquisitionsTable_8081E1D9A4C468362745B27FECE739BA" xlink:to="loc_ipg_AcquisitionsTypeAxis_7FB9AFE759FE84E56D79B288F6A96A68" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_AcquisitionsTypeDomain" xlink:label="loc_ipg_AcquisitionsTypeDomain_D835D2A7FE5644E84C68B288FA020C3D_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ipg_AcquisitionsTypeAxis_7FB9AFE759FE84E56D79B288F6A96A68" xlink:to="loc_ipg_AcquisitionsTypeDomain_D835D2A7FE5644E84C68B288FA020C3D_default" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_AcquisitionsTypeDomain" xlink:label="loc_ipg_AcquisitionsTypeDomain_D835D2A7FE5644E84C68B288FA020C3D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ipg_AcquisitionsTypeAxis_7FB9AFE759FE84E56D79B288F6A96A68" xlink:to="loc_ipg_AcquisitionsTypeDomain_D835D2A7FE5644E84C68B288FA020C3D" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CurrentYearAcquisitionMember" xlink:label="loc_ipg_CurrentYearAcquisitionMember_90D5A809EEEBEE123EB6B288F75050D2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_AcquisitionsTypeDomain_D835D2A7FE5644E84C68B288FA020C3D" xlink:to="loc_ipg_CurrentYearAcquisitionMember_90D5A809EEEBEE123EB6B288F75050D2" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PriorYearAcquisitionMember" xlink:label="loc_ipg_PriorYearAcquisitionMember_7A3FE8F35DC528BAFB0DB289BA0ECF69" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_AcquisitionsTypeDomain_D835D2A7FE5644E84C68B288FA020C3D" xlink:to="loc_ipg_PriorYearAcquisitionMember_7A3FE8F35DC528BAFB0DB289BA0ECF69" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_AcquisitionRelatedPayments" xlink:label="loc_ipg_AcquisitionRelatedPayments_4DA8CCD4AA85B27166BBB2A04FD3CB34" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_736923C146DC2BE98795B2852A7F640C" xlink:to="loc_ipg_AcquisitionRelatedPayments_4DA8CCD4AA85B27166BBB2A04FD3CB34" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_9BC83DA300CECAE1C1A6B29FCBE1E59F" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_736923C146DC2BE98795B2852A7F640C" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_9BC83DA300CECAE1C1A6B29FCBE1E59F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_FA4CE3D3FBC4AC6EBDA6B27B78FA8FB4" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_736923C146DC2BE98795B2852A7F640C" xlink:to="loc_us-gaap_CashAcquiredFromAcquisition_FA4CE3D3FBC4AC6EBDA6B27B78FA8FB4" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PaymentsToAcquireBusinessesGrossLessOperatingExpenses" xlink:label="loc_ipg_PaymentsToAcquireBusinessesGrossLessOperatingExpenses_9CB09C221D50940BC7E8B27C6A3FBFE4" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_736923C146DC2BE98795B2852A7F640C" xlink:to="loc_ipg_PaymentsToAcquireBusinessesGrossLessOperatingExpenses_9CB09C221D50940BC7E8B27C6A3FBFE4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsExpensesAndLossesRecognized" xlink:label="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsExpensesAndLossesRecognized_546C31B53F2C42F7735CB27B78FADEC2" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_736923C146DC2BE98795B2852A7F640C" xlink:to="loc_us-gaap_BusinessCombinationSeparatelyRecognizedTransactionsExpensesAndLossesRecognized_546C31B53F2C42F7735CB27B78FADEC2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_405F92C0B6536EEEA28BB27B78FAFB8C" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_736923C146DC2BE98795B2852A7F640C" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_405F92C0B6536EEEA28BB27B78FAFB8C" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/AcquisitionsNarrativeDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_BA5649C4DDBA67E0CC50B27B786BFE90" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_CDC723C5C49B670DFBC5B27B7868C993" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_BA5649C4DDBA67E0CC50B27B786BFE90" xlink:to="loc_us-gaap_StatementTable_CDC723C5C49B670DFBC5B27B7868C993" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_034C8B43D7EFAE385EC8B27B78695401" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_CDC723C5C49B670DFBC5B27B7868C993" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_034C8B43D7EFAE385EC8B27B78695401" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C585C5535AE7E7C29D15B27B786AD14C_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_034C8B43D7EFAE385EC8B27B78695401" xlink:to="loc_us-gaap_SegmentDomain_C585C5535AE7E7C29D15B27B786AD14C_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C585C5535AE7E7C29D15B27B786AD14C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_034C8B43D7EFAE385EC8B27B78695401" xlink:to="loc_us-gaap_SegmentDomain_C585C5535AE7E7C29D15B27B786AD14C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_9B76040EDBF70D805356B27B786B1FC9" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C585C5535AE7E7C29D15B27B786AD14C" xlink:to="loc_us-gaap_OperatingSegmentsMember_9B76040EDBF70D805356B27B786B1FC9" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ReportableSegmentsTwoMember" xlink:label="loc_ipg_ReportableSegmentsTwoMember_F8BF54EC41B2CD586A31B27B786BB0F9" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C585C5535AE7E7C29D15B27B786AD14C" xlink:to="loc_ipg_ReportableSegmentsTwoMember_F8BF54EC41B2CD586A31B27B786BB0F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_87D18A220445028543C0B27B786C5EF7" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA5649C4DDBA67E0CC50B27B786BFE90" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_87D18A220445028543C0B27B786C5EF7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NumberOfBusinessesAcquired" xlink:label="loc_us-gaap_NumberOfBusinessesAcquired_6EB16546FB4888965290B27B786C6B8B" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA5649C4DDBA67E0CC50B27B786BFE90" xlink:to="loc_us-gaap_NumberOfBusinessesAcquired_6EB16546FB4888965290B27B786C6B8B" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/AcquisitionsNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/AcquisitionsTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/AntidilutiveSharesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_ED4BA131D1E4DAD67AF2A3617AE39B50" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_D640896F201F5D9361F6A3617AE324C3" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_ED4BA131D1E4DAD67AF2A3617AE39B50" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_D640896F201F5D9361F6A3617AE324C3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_88DE239630D2762F4F45A3617AE373B1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_D640896F201F5D9361F6A3617AE324C3" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_88DE239630D2762F4F45A3617AE373B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7A1A44CC50F5A534E7D1A3617AE3109F_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_88DE239630D2762F4F45A3617AE373B1" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7A1A44CC50F5A534E7D1A3617AE3109F_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7A1A44CC50F5A534E7D1A3617AE3109F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_88DE239630D2762F4F45A3617AE373B1" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7A1A44CC50F5A534E7D1A3617AE3109F" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PreferredStockOutstandingMember" xlink:label="loc_ipg_PreferredStockOutstandingMember_EA956FFB4E1544FC92EDA3617AE3A8EE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7A1A44CC50F5A534E7D1A3617AE3109F" xlink:to="loc_ipg_PreferredStockOutstandingMember_EA956FFB4E1544FC92EDA3617AE3A8EE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_0771B0D0EEB446EC1BBFA3617AE39DB2" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_7A1A44CC50F5A534E7D1A3617AE3109F" xlink:to="loc_us-gaap_EmployeeStockOptionMember_0771B0D0EEB446EC1BBFA3617AE39DB2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_081A067C94E5B1C1A275A3617AE32A0C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_ED4BA131D1E4DAD67AF2A3617AE39B50" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_081A067C94E5B1C1A275A3617AE32A0C" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_AntidilutiveStockOptionsExcludedExercisePriceGreaterThanAverageMarketPrice" xlink:label="loc_ipg_AntidilutiveStockOptionsExcludedExercisePriceGreaterThanAverageMarketPrice_50833CF7E2E3C26D781AA3617AE3FAB3" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_ED4BA131D1E4DAD67AF2A3617AE39B50" xlink:to="loc_ipg_AntidilutiveStockOptionsExcludedExercisePriceGreaterThanAverageMarketPrice_50833CF7E2E3C26D781AA3617AE3FAB3" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/CommitmentsAndContingenciesNetRentExpenseDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/CommitmentsAndContingenciesNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/CommitmentsAndContingenciesTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ComponentsOfDeferredTaxAssetsDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ComponentsOfIncomeBeforeIncomeTaxesDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ConsolidatedBalanceSheets" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_C8984F7B5E91E9D23269B43C0C6A4B02" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_StatementTable_C8984F7B5E91E9D23269B43C0C6A4B02" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_06DEF933CB31D5D447ADB43C0C6A38DE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_C8984F7B5E91E9D23269B43C0C6A4B02" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_06DEF933CB31D5D447ADB43C0C6A38DE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_06DEF933CB31D5D447ADB43C0C6A38DE" xlink:to="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_06DEF933CB31D5D447ADB43C0C6A38DE" xlink:to="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_95F36941DE5BB7DDF740B43C0C6A781F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:to="loc_us-gaap_PreferredStockMember_95F36941DE5BB7DDF740B43C0C6A781F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_1D5BEB5017C43E6273B4B43C0C6A9F47" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:to="loc_us-gaap_CommonStockMember_1D5BEB5017C43E6273B4B43C0C6A9F47" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_CC40DDE37606EE05D702B43C0C6A2C92" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_CC40DDE37606EE05D702B43C0C6A2C92" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_C11D3C7272D95A201BDBB43C0C6A9E42" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:to="loc_us-gaap_RetainedEarningsMember_C11D3C7272D95A201BDBB43C0C6A9E42" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_80A97AA6F6C9DF5971A6B43C0C6A7A48" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_80A97AA6F6C9DF5971A6B43C0C6A7A48" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_740CCF06C677A6DE5813B43C0C6AC63D" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:to="loc_us-gaap_TreasuryStockMember_740CCF06C677A6DE5813B43C0C6AC63D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ParentMember" xlink:label="loc_us-gaap_ParentMember_DA77B731B11DBEA0B383B43C0C6A9F15" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:to="loc_us-gaap_ParentMember_DA77B731B11DBEA0B383B43C0C6A9F15" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_6995066CAC6186846972B43C0C6A34D6" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5DDF3C358E212FBF4D05B43C0C6A7F74" xlink:to="loc_us-gaap_NoncontrollingInterestMember_6995066CAC6186846972B43C0C6A34D6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_7FC4BAE3CD046A7C87F5B43C0C6AAA09" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_7FC4BAE3CD046A7C87F5B43C0C6AAA09" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharesIssued" xlink:label="loc_us-gaap_SharesIssued_40C069F6477088AB225DB43C0C6A71DA" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_SharesIssued_40C069F6477088AB225DB43C0C6A71DA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_B844E107A62C7060E5A3B43C0C6A7707" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_ProfitLoss_B844E107A62C7060E5A3B43C0C6A7707" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_BE612874D056FAB458F5B43C0C6AD1CE" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_BE612874D056FAB458F5B43C0C6AD1CE" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ChangesInTemporaryEquity" xlink:label="loc_ipg_ChangesInTemporaryEquity_64DD9FB69C357C8157ECB43C0C6AF8DD" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_ipg_ChangesInTemporaryEquity_64DD9FB69C357C8157ECB43C0C6AF8DD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinorityInterestPeriodIncreaseDecrease" xlink:label="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_C3DF4BC788E8C125D55AB43C0C6A2D82" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_C3DF4BC788E8C125D55AB43C0C6A2D82" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_42B46E3B5F0DCF99E8A9B43C0C6AD150" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_42B46E3B5F0DCF99E8A9B43C0C6AD150" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinorityInterestChangeInRedemptionValue" xlink:label="loc_us-gaap_MinorityInterestChangeInRedemptionValue_8C471A7F883C8D6C0C35B43C0C6A9594" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_MinorityInterestChangeInRedemptionValue_8C471A7F883C8D6C0C35B43C0C6A9594" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_A8FB20E3DC47A84902D1B43C0C6AE560" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_A8FB20E3DC47A84902D1B43C0C6AE560" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockSharesRetired" xlink:label="loc_us-gaap_TreasuryStockSharesRetired_87BBE664611B4F26AFD8B43C0C6AF12E" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_TreasuryStockSharesRetired_87BBE664611B4F26AFD8B43C0C6AF12E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockRetiredCostMethodAmount" xlink:label="loc_us-gaap_TreasuryStockRetiredCostMethodAmount_1323739387F5DF6255D7B43C0C6AAAC5" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_TreasuryStockRetiredCostMethodAmount_1323739387F5DF6255D7B43C0C6AAAC5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="loc_us-gaap_DividendsCommonStockCash_7868622D646055377A4AB43C0C6A1356" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_DividendsCommonStockCash_7868622D646055377A4AB43C0C6A1356" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:label="loc_us-gaap_DividendsPreferredStockCash_BB2853FA783FBE86EA80B43C0C6A15FF" xlink:type="locator" />
    <definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_DividendsPreferredStockCash_BB2853FA783FBE86EA80B43C0C6A15FF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_0ED8749B4A910C59EDBBB43C0C6A50D6" xlink:type="locator" />
    <definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_0ED8749B4A910C59EDBBB43C0C6A50D6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_48CE010F62593E2F1F99B43C0C6A292E" xlink:type="locator" />
    <definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities_48CE010F62593E2F1F99B43C0C6A292E" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ExercisedCappedCallOptionValueAcquiredNetShareSettlement" xlink:label="loc_ipg_ExercisedCappedCallOptionValueAcquiredNetShareSettlement_13FAC3D169491E4E22D1B43C0C6A4134" xlink:type="locator" />
    <definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_ipg_ExercisedCappedCallOptionValueAcquiredNetShareSettlement_13FAC3D169491E4E22D1B43C0C6A4134" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_StockIssuedDuringPeriodSharesConversionOfPreferredStock" xlink:label="loc_ipg_StockIssuedDuringPeriodSharesConversionOfPreferredStock_D47E44D27678C345A1D6B43C0C6AC5B8" xlink:type="locator" />
    <definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_ipg_StockIssuedDuringPeriodSharesConversionOfPreferredStock_D47E44D27678C345A1D6B43C0C6AC5B8" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_StockIssuedDuringPeriodValueConversionOfPreferredStock" xlink:label="loc_ipg_StockIssuedDuringPeriodValueConversionOfPreferredStock_E1A6181CC8EB4831F5EBB43C0C6A7235" xlink:type="locator" />
    <definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_ipg_StockIssuedDuringPeriodValueConversionOfPreferredStock_E1A6181CC8EB4831F5EBB43C0C6A7235" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_E8DCAB0C149DC4531DDBB43C0C6A4B77" xlink:type="locator" />
    <definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_E8DCAB0C149DC4531DDBB43C0C6A4B77" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_57DEEC3D8C12BF3998A8B43C0C6A4509" xlink:type="locator" />
    <definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_57DEEC3D8C12BF3998A8B43C0C6A4509" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_9BC618325F42969C7110B43C0C6A677E" xlink:type="locator" />
    <definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_9BC618325F42969C7110B43C0C6A677E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_67FC0E6FAC0C61C3B965B43C0C6AA8BF" xlink:type="locator" />
    <definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_67FC0E6FAC0C61C3B965B43C0C6AA8BF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_EEEE16EF5759D3A9D753B43C0C6A724B" xlink:type="locator" />
    <definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_EEEE16EF5759D3A9D753B43C0C6A724B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_31EBBBA25085A8714C61B43C0C6A23F2" xlink:type="locator" />
    <definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_31EBBBA25085A8714C61B43C0C6A23F2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet" xlink:label="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_14774DBE9D298E9A736EB43C0C6A3A1F" xlink:type="locator" />
    <definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_AdjustmentToAdditionalPaidInCapitalIncomeTaxEffectFromShareBasedCompensationNet_14774DBE9D298E9A736EB43C0C6A3A1F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockholdersEquityOther" xlink:label="loc_us-gaap_StockholdersEquityOther_7869534FDEA7ABE5B742B43C0C6A4835" xlink:type="locator" />
    <definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_549ADA7960E364B6D547B43C0C6A6B67" xlink:to="loc_us-gaap_StockholdersEquityOther_7869534FDEA7ABE5B742B43C0C6A4835" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/ContingentAcquisitionObligationsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_BusinessAcquisitionContingentConsiderationLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_0C8255D5583D7842481EB2DAAD62857B" xlink:type="locator" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ContingentAcquisitionObligationsTable" xlink:label="loc_ipg_ContingentAcquisitionObligationsTable_55EFC5B4CE2396FE4CD0B2DAAD62BF5A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_0C8255D5583D7842481EB2DAAD62857B" xlink:to="loc_ipg_ContingentAcquisitionObligationsTable_55EFC5B4CE2396FE4CD0B2DAAD62BF5A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ContingentAcquisitionObligationsAxis" xlink:label="loc_ipg_ContingentAcquisitionObligationsAxis_9E8C998539B24DFF78FFB2DAAD62B116" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ipg_ContingentAcquisitionObligationsTable_55EFC5B4CE2396FE4CD0B2DAAD62BF5A" xlink:to="loc_ipg_ContingentAcquisitionObligationsAxis_9E8C998539B24DFF78FFB2DAAD62B116" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ContingentAcquisitionObligationsDomain" xlink:label="loc_ipg_ContingentAcquisitionObligationsDomain_D8360F032323934BB2EBB2DAAD620987_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ipg_ContingentAcquisitionObligationsAxis_9E8C998539B24DFF78FFB2DAAD62B116" xlink:to="loc_ipg_ContingentAcquisitionObligationsDomain_D8360F032323934BB2EBB2DAAD620987_default" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ContingentAcquisitionObligationsDomain" xlink:label="loc_ipg_ContingentAcquisitionObligationsDomain_D8360F032323934BB2EBB2DAAD620987" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ipg_ContingentAcquisitionObligationsAxis_9E8C998539B24DFF78FFB2DAAD62B116" xlink:to="loc_ipg_ContingentAcquisitionObligationsDomain_D8360F032323934BB2EBB2DAAD620987" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_DeferredAcquisitionPaymentsMember" xlink:label="loc_ipg_DeferredAcquisitionPaymentsMember_9CC45065B1F60B7D1821B2DAAD626BE8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_ContingentAcquisitionObligationsDomain_D8360F032323934BB2EBB2DAAD620987" xlink:to="loc_ipg_DeferredAcquisitionPaymentsMember_9CC45065B1F60B7D1821B2DAAD626BE8" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_RedeemableNoncontrollingInterestsAndCallOptionsWithAffiliatesMember" xlink:label="loc_ipg_RedeemableNoncontrollingInterestsAndCallOptionsWithAffiliatesMember_AEBC1EFC7FC67011F2E4B2DAAD629191" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_ContingentAcquisitionObligationsDomain_D8360F032323934BB2EBB2DAAD620987" xlink:to="loc_ipg_RedeemableNoncontrollingInterestsAndCallOptionsWithAffiliatesMember_AEBC1EFC7FC67011F2E4B2DAAD629191" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_RedeemableAtNoncontrollingEquityOwnersDiscretionMember" xlink:label="loc_ipg_RedeemableAtNoncontrollingEquityOwnersDiscretionMember_16EF3EEF2A02E1E9A3DBB2DAAD62BFB6" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_RedeemableNoncontrollingInterestsAndCallOptionsWithAffiliatesMember_AEBC1EFC7FC67011F2E4B2DAAD629191" xlink:to="loc_ipg_RedeemableAtNoncontrollingEquityOwnersDiscretionMember_16EF3EEF2A02E1E9A3DBB2DAAD62BFB6" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_TotalContingentAcquisitionPaymentsMember" xlink:label="loc_ipg_TotalContingentAcquisitionPaymentsMember_3E056682BFC0F2E80635B2DAAD628EBE" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_ContingentAcquisitionObligationsDomain_D8360F032323934BB2EBB2DAAD620987" xlink:to="loc_ipg_TotalContingentAcquisitionPaymentsMember_3E056682BFC0F2E80635B2DAAD628EBE" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CashCompensationExpenseIncludedInContingentAcquisitionsMember" xlink:label="loc_ipg_CashCompensationExpenseIncludedInContingentAcquisitionsMember_E3F65928AFB788A78C2EB2DAAD62AF4F" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_ContingentAcquisitionObligationsDomain_D8360F032323934BB2EBB2DAAD620987" xlink:to="loc_ipg_CashCompensationExpenseIncludedInContingentAcquisitionsMember_E3F65928AFB788A78C2EB2DAAD62AF4F" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_TotalContingentAcquisitionPaymentsExcludingCompensationExpenseMember" xlink:label="loc_ipg_TotalContingentAcquisitionPaymentsExcludingCompensationExpenseMember_44B44377FFFFD6D76129B2DAAD62B6CB" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_ContingentAcquisitionObligationsDomain_D8360F032323934BB2EBB2DAAD620987" xlink:to="loc_ipg_TotalContingentAcquisitionPaymentsExcludingCompensationExpenseMember_44B44377FFFFD6D76129B2DAAD62B6CB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear_38BC7AA01DB8E65416CEB2DAAD6212EB" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_0C8255D5583D7842481EB2DAAD62857B" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueWithinOneYear_38BC7AA01DB8E65416CEB2DAAD6212EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueInSecondYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInSecondYear_98B52917905B816EDEC8B2DAAD71A8D9" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_0C8255D5583D7842481EB2DAAD62857B" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInSecondYear_98B52917905B816EDEC8B2DAAD71A8D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueInThirdYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInThirdYear_8C4C442E8329A437C601B2DAAD71B6FD" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_0C8255D5583D7842481EB2DAAD62857B" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInThirdYear_8C4C442E8329A437C601B2DAAD71B6FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueInFourthYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInFourthYear_7DC2E1D994987E215287B2DAAD71FC59" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_0C8255D5583D7842481EB2DAAD62857B" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInFourthYear_7DC2E1D994987E215287B2DAAD71FC59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueInFifthYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInFifthYear_342216BDA31ED5BA9984B2DAAD71BB1A" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_0C8255D5583D7842481EB2DAAD62857B" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInFifthYear_342216BDA31ED5BA9984B2DAAD71BB1A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear_2AA72FB53147D39C6AE5B2DAAD710C37" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_0C8255D5583D7842481EB2DAAD62857B" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear_2AA72FB53147D39C6AE5B2DAAD710C37" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligation" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligation_C4923BBDF48A318FC644B2DAAD7162F0" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionContingentConsiderationLineItems_0C8255D5583D7842481EB2DAAD62857B" xlink:to="loc_us-gaap_RecordedUnconditionalPurchaseObligation_C4923BBDF48A318FC644B2DAAD7162F0" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/DebtAndCreditAgreementsAnnualMaturitiesDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/DebtAndCreditAgreementsConvertibleNotesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtConversionLineItems" xlink:label="loc_us-gaap_DebtConversionLineItems_91B135274A1DDCC0FFEBB6A03D3F60D2" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtConversionTable" xlink:label="loc_us-gaap_DebtConversionTable_4E732FA5BECF3399D9A9B6A03D3F8856" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtConversionLineItems_91B135274A1DDCC0FFEBB6A03D3F60D2" xlink:to="loc_us-gaap_DebtConversionTable_4E732FA5BECF3399D9A9B6A03D3F8856" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_4FB27A525658498BC3F3B6A03D3F8ABF" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtConversionTable_4E732FA5BECF3399D9A9B6A03D3F8856" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_4FB27A525658498BC3F3B6A03D3F8ABF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_78BC24085A23527D4F66B6A03D3F4C8C_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4FB27A525658498BC3F3B6A03D3F8ABF" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_78BC24085A23527D4F66B6A03D3F4C8C_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_78BC24085A23527D4F66B6A03D3F4C8C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4FB27A525658498BC3F3B6A03D3F8ABF" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_78BC24085A23527D4F66B6A03D3F4C8C" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ConvertibleDebt2Member" xlink:label="loc_ipg_ConvertibleDebt2Member_8078245BC4EFC28152E9B6A03D3FE76C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_78BC24085A23527D4F66B6A03D3F4C8C" xlink:to="loc_ipg_ConvertibleDebt2Member_8078245BC4EFC28152E9B6A03D3FE76C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_CDB4225E153CFB637675B6A03D3F585D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionLineItems_91B135274A1DDCC0FFEBB6A03D3F60D2" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_CDB4225E153CFB637675B6A03D3F585D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_B15D067CF7E0DBECC87BB6A3DB5639CF" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionLineItems_91B135274A1DDCC0FFEBB6A03D3F60D2" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_B15D067CF7E0DBECC87BB6A3DB5639CF" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_DebtConversionRate" xlink:label="loc_ipg_DebtConversionRate_5405405105FE8B5A5840B6A03D3FD699" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionLineItems_91B135274A1DDCC0FFEBB6A03D3F60D2" xlink:to="loc_ipg_DebtConversionRate_5405405105FE8B5A5840B6A03D3FD699" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_Principalamountconvertedintostock" xlink:label="loc_ipg_Principalamountconvertedintostock_973C7D41BBA1171B3FE0B6A03D3F4DBB" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionLineItems_91B135274A1DDCC0FFEBB6A03D3F60D2" xlink:to="loc_ipg_Principalamountconvertedintostock_973C7D41BBA1171B3FE0B6A03D3F4DBB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConversionOfStockSharesIssued1" xlink:label="loc_us-gaap_ConversionOfStockSharesIssued1_0CF5BCD9054E2BEAD9E9B6A03D3F0BF2" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionLineItems_91B135274A1DDCC0FFEBB6A03D3F60D2" xlink:to="loc_us-gaap_ConversionOfStockSharesIssued1_0CF5BCD9054E2BEAD9E9B6A03D3F0BF2" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_NetShareSettlement" xlink:label="loc_ipg_NetShareSettlement_83CFB64B7A8D2F83CD31B6A03D3FD960" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtConversionLineItems_91B135274A1DDCC0FFEBB6A03D3F60D2" xlink:to="loc_ipg_NetShareSettlement_83CFB64B7A8D2F83CD31B6A03D3FD960" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/DebtAndCreditAgreementsCreditFacilityDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_ADEE03FAC70D709F5562B43C0BAF3FF7" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_ADEE03FAC70D709F5562B43C0BAF3FF7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_B120E871AE9A4EA455AAB43C0BAF8D53" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_ADEE03FAC70D709F5562B43C0BAF3FF7" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_B120E871AE9A4EA455AAB43C0BAF8D53" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_39335741576863514EE0B43C0BAFE614_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_B120E871AE9A4EA455AAB43C0BAF8D53" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_39335741576863514EE0B43C0BAFE614_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_39335741576863514EE0B43C0BAFE614" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_B120E871AE9A4EA455AAB43C0BAF8D53" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_39335741576863514EE0B43C0BAFE614" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CommittedCreditFacilityMember" xlink:label="loc_ipg_CommittedCreditFacilityMember_F8E12E554515856C6654B43C0BAF1D16" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_39335741576863514EE0B43C0BAFE614" xlink:to="loc_ipg_CommittedCreditFacilityMember_F8E12E554515856C6654B43C0BAF1D16" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UncommittedCreditFacilityMember" xlink:label="loc_ipg_UncommittedCreditFacilityMember_71AE56AE43E4EA3D6255B43C0BAFF2A3" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_39335741576863514EE0B43C0BAFE614" xlink:to="loc_ipg_UncommittedCreditFacilityMember_71AE56AE43E4EA3D6255B43C0BAFF2A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_C30BFC840E93F3E431EBB43C0BAF4B79" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_ADEE03FAC70D709F5562B43C0BAF3FF7" xlink:to="loc_us-gaap_CreditFacilityAxis_C30BFC840E93F3E431EBB43C0BAF4B79" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_019E72A5381F565A203DB43C0BAF46E5_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_C30BFC840E93F3E431EBB43C0BAF4B79" xlink:to="loc_us-gaap_CreditFacilityDomain_019E72A5381F565A203DB43C0BAF46E5_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_019E72A5381F565A203DB43C0BAF46E5" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_C30BFC840E93F3E431EBB43C0BAF4B79" xlink:to="loc_us-gaap_CreditFacilityDomain_019E72A5381F565A203DB43C0BAF46E5" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_LineofCreditFacilityWeightedAverageInterestRate" xlink:label="loc_ipg_LineofCreditFacilityWeightedAverageInterestRate_09CE67A88B2238F5CE08B43C0BAF4563" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_ipg_LineofCreditFacilityWeightedAverageInterestRate_09CE67A88B2238F5CE08B43C0BAF4563" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_7A97E1DB3F3669F1D78AB43C0BAF4531" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_7A97E1DB3F3669F1D78AB43C0BAF4531" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_5ED67CB18B60EDCF6449B43C0BAF1EC1" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_5ED67CB18B60EDCF6449B43C0BAF1EC1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_6237279DFC936F6EB242B43C0BAFDDBA" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_us-gaap_LineOfCredit_6237279DFC936F6EB242B43C0BAFDDBA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_519638A4DA40DEC71217B43C0BAFE8BB" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_519638A4DA40DEC71217B43C0BAFE8BB" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_LineofCreditFacilityCommitmentIncrease" xlink:label="loc_ipg_LineofCreditFacilityCommitmentIncrease_8377D92B3FB81CF3BE19B43C0BAF916C" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_ipg_LineofCreditFacilityCommitmentIncrease_8377D92B3FB81CF3BE19B43C0BAF916C" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_LineOfCreditFacilityLimitsOnLettersOfCredit" xlink:label="loc_ipg_LineOfCreditFacilityLimitsOnLettersOfCredit_DC58518BA2E6D70F17D3B43C0BAF4E3B" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_ipg_LineOfCreditFacilityLimitsOnLettersOfCredit_DC58518BA2E6D70F17D3B43C0BAF4E3B" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_MarginForBaseRateAdvances" xlink:label="loc_ipg_MarginForBaseRateAdvances_F30D600C20124F683BB4B43C0BAF94CA" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_ipg_MarginForBaseRateAdvances_F30D600C20124F683BB4B43C0BAF94CA" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_MarginForEurocurrencyRateAdvances" xlink:label="loc_ipg_MarginForEurocurrencyRateAdvances_18F1EEE3E4F6B690983CB43C0BAF0D56" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_ipg_MarginForEurocurrencyRateAdvances_18F1EEE3E4F6B690983CB43C0BAF0D56" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_AnnualRateForFrontingFeesAccruedOnLettersOfCredit" xlink:label="loc_ipg_AnnualRateForFrontingFeesAccruedOnLettersOfCredit_1EF570FCF9805AD4E2D8B43C0BAF25F6" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_ipg_AnnualRateForFrontingFeesAccruedOnLettersOfCredit_1EF570FCF9805AD4E2D8B43C0BAF25F6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_A61C1F93F355A0B97D2FB43C0BAF81D2" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_A61C1F93F355A0B97D2FB43C0BAF81D2" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_LeverageRatioMaximum" xlink:label="loc_ipg_LeverageRatioMaximum_387A4BDA95D0BDE3D41AB43C0BAF52B4" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_ipg_LeverageRatioMaximum_387A4BDA95D0BDE3D41AB43C0BAF52B4" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_InterestCoverageRatioMinimum" xlink:label="loc_ipg_InterestCoverageRatioMinimum_33716AD7A0D7E80EF0BDB43C0BAF1B22" xlink:type="locator" />
    <definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_ipg_InterestCoverageRatioMinimum_33716AD7A0D7E80EF0BDB43C0BAF1B22" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CashDebtPoolingArrangementsAmountNetted" xlink:label="loc_ipg_CashDebtPoolingArrangementsAmountNetted_5F856C925DD62C80C1C9B43C0BAFB9B9" xlink:type="locator" />
    <definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_8522DA042CC7EC5F57AFB43C0BAFD12E" xlink:to="loc_ipg_CashDebtPoolingArrangementsAmountNetted_5F856C925DD62C80C1C9B43C0BAFB9B9" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/DebtAndCreditAgreementsExtinguishmentOfDebtDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ExtinguishmentOfDebtLineItems" xlink:label="loc_us-gaap_ExtinguishmentOfDebtLineItems_2020AF3EB9430E83BACCB682708FC667" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfExtinguishmentOfDebtTable" xlink:label="loc_us-gaap_ScheduleOfExtinguishmentOfDebtTable_40E3C013E552EC729DDFB68270803204" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ExtinguishmentOfDebtLineItems_2020AF3EB9430E83BACCB682708FC667" xlink:to="loc_us-gaap_ScheduleOfExtinguishmentOfDebtTable_40E3C013E552EC729DDFB68270803204" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_76BCB6BB8616928123E3B68270CE8AFD" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfExtinguishmentOfDebtTable_40E3C013E552EC729DDFB68270803204" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_76BCB6BB8616928123E3B68270CE8AFD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_61073879FF5FDD423033B68270CE067D_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_76BCB6BB8616928123E3B68270CE8AFD" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_61073879FF5FDD423033B68270CE067D_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_61073879FF5FDD423033B68270CE067D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_76BCB6BB8616928123E3B68270CE8AFD" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_61073879FF5FDD423033B68270CE067D" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt6.25NoteMember" xlink:label="loc_ipg_UnsecuredDebt6.25NoteMember_945C2BE4904737F358E7B68270FDBDF8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_61073879FF5FDD423033B68270CE067D" xlink:to="loc_ipg_UnsecuredDebt6.25NoteMember_945C2BE4904737F358E7B68270FDBDF8" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt10.0NoteMember" xlink:label="loc_ipg_UnsecuredDebt10.0NoteMember_0D0B10666A20A795298EB684C6A11E58" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_61073879FF5FDD423033B68270CE067D" xlink:to="loc_ipg_UnsecuredDebt10.0NoteMember_0D0B10666A20A795298EB684C6A11E58" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ExtinguishmentOfDebtAxis" xlink:label="loc_us-gaap_ExtinguishmentOfDebtAxis_BE03B0D98B457CFFEE98B68270800BFD" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfExtinguishmentOfDebtTable_40E3C013E552EC729DDFB68270803204" xlink:to="loc_us-gaap_ExtinguishmentOfDebtAxis_BE03B0D98B457CFFEE98B68270800BFD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ExtinguishmentOfDebtTypeDomain" xlink:label="loc_us-gaap_ExtinguishmentOfDebtTypeDomain_0A5AE74189376DBEB302B682708FFD59_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ExtinguishmentOfDebtAxis_BE03B0D98B457CFFEE98B68270800BFD" xlink:to="loc_us-gaap_ExtinguishmentOfDebtTypeDomain_0A5AE74189376DBEB302B682708FFD59_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ExtinguishmentOfDebtTypeDomain" xlink:label="loc_us-gaap_ExtinguishmentOfDebtTypeDomain_0A5AE74189376DBEB302B682708FFD59" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ExtinguishmentOfDebtAxis_BE03B0D98B457CFFEE98B68270800BFD" xlink:to="loc_us-gaap_ExtinguishmentOfDebtTypeDomain_0A5AE74189376DBEB302B682708FFD59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_FDA00BB2901ECF33C843B68897E3AA91" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ExtinguishmentOfDebtLineItems_2020AF3EB9430E83BACCB682708FC667" xlink:to="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_FDA00BB2901ECF33C843B68897E3AA91" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarlyRepaymentOfSeniorDebt" xlink:label="loc_us-gaap_EarlyRepaymentOfSeniorDebt_6631E6BD7A8A03AEB181B68455D9A5F5" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ExtinguishmentOfDebtLineItems_2020AF3EB9430E83BACCB682708FC667" xlink:to="loc_us-gaap_EarlyRepaymentOfSeniorDebt_6631E6BD7A8A03AEB181B68455D9A5F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_8E32B07123414D5B5085B6836315751B" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ExtinguishmentOfDebtLineItems_2020AF3EB9430E83BACCB682708FC667" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_8E32B07123414D5B5085B6836315751B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_us-gaap_InterestPaidNet_440DC7DDEE81A78CBFFFB682EC4DE484" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ExtinguishmentOfDebtLineItems_2020AF3EB9430E83BACCB682708FC667" xlink:to="loc_us-gaap_InterestPaidNet_440DC7DDEE81A78CBFFFB682EC4DE484" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_B80E1D9D89781DF96751B68270AF8B82" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ExtinguishmentOfDebtLineItems_2020AF3EB9430E83BACCB682708FC667" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_B80E1D9D89781DF96751B68270AF8B82" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RedemptionPremium" xlink:label="loc_us-gaap_RedemptionPremium_9468600039EF2C577117B68572441000" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ExtinguishmentOfDebtLineItems_2020AF3EB9430E83BACCB682708FC667" xlink:to="loc_us-gaap_RedemptionPremium_9468600039EF2C577117B68572441000" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_WriteoffofUnamortizedDiscount" xlink:label="loc_ipg_WriteoffofUnamortizedDiscount_56D9AD0AC3B51609F582B686E052854C" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ExtinguishmentOfDebtLineItems_2020AF3EB9430E83BACCB682708FC667" xlink:to="loc_ipg_WriteoffofUnamortizedDiscount_56D9AD0AC3B51609F582B686E052854C" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/DebtAndCreditAgreementsLongTermDebtDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_6599BCCC34627EC62C04B67BE306ACC3" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_DebtInstrumentTable_6599BCCC34627EC62C04B67BE306ACC3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_8AE925AA93B9A8F53181B67BE306F687" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6599BCCC34627EC62C04B67BE306ACC3" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_8AE925AA93B9A8F53181B67BE306F687" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8AE925AA93B9A8F53181B67BE306F687" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8AE925AA93B9A8F53181B67BE306F687" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt6.25NoteMember" xlink:label="loc_ipg_UnsecuredDebt6.25NoteMember_C17BB4E064EE5CD3F21CB67BE3076838" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2" xlink:to="loc_ipg_UnsecuredDebt6.25NoteMember_C17BB4E064EE5CD3F21CB67BE3076838" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt2.25NoteMember" xlink:label="loc_ipg_UnsecuredDebt2.25NoteMember_E4248224C27063126B83B67BE307DDC6" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2" xlink:to="loc_ipg_UnsecuredDebt2.25NoteMember_E4248224C27063126B83B67BE307DDC6" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt4.00NoteMember" xlink:label="loc_ipg_UnsecuredDebt4.00NoteMember_30127D74C5D5396CFF8FB67BE307BD7B" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2" xlink:to="loc_ipg_UnsecuredDebt4.00NoteMember_30127D74C5D5396CFF8FB67BE307BD7B" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt3.75NoteMember" xlink:label="loc_ipg_UnsecuredDebt3.75NoteMember_DE7759BB0BE14A4B6FA3B67BE308D88E" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2" xlink:to="loc_ipg_UnsecuredDebt3.75NoteMember_DE7759BB0BE14A4B6FA3B67BE308D88E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConvertibleDebtMember" xlink:label="loc_us-gaap_ConvertibleDebtMember_D756A51E6D2CF3F6F28AB67BE3088D8B" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2" xlink:to="loc_us-gaap_ConvertibleDebtMember_D756A51E6D2CF3F6F28AB67BE3088D8B" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt4.20NotesMember" xlink:label="loc_ipg_UnsecuredDebt4.20NotesMember_5CAC72B9D736B77D0FB8B67BE30843C1" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2" xlink:to="loc_ipg_UnsecuredDebt4.20NotesMember_5CAC72B9D736B77D0FB8B67BE30843C1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NotesPayableOtherPayablesMember" xlink:label="loc_us-gaap_NotesPayableOtherPayablesMember_F144628E4E39F6D3A6C2B67BE3084D37" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_AEFF131B02E1CC4F155CB67BE3077AB2" xlink:to="loc_us-gaap_NotesPayableOtherPayablesMember_F144628E4E39F6D3A6C2B67BE3084D37" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_BEF81A3078AADC8657E3B67BE308E5DC" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_BEF81A3078AADC8657E3B67BE308E5DC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_DE530FE292AE020E3215B67BE309BB99" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_DE530FE292AE020E3215B67BE309BB99" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_89AB803F52BA8D726AC6B67BE309ACDB" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_89AB803F52BA8D726AC6B67BE309ACDB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="loc_us-gaap_DebtInstrumentMaturityDate_108695C61B1FEF9F92E9B67BE3094058" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_DebtInstrumentMaturityDate_108695C61B1FEF9F92E9B67BE3094058" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1D359A5873BEF63FC3B6B67BE3099292" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1D359A5873BEF63FC3B6B67BE3099292" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="loc_us-gaap_DebtInstrumentFairValue_966174C89EF09C4D342DB67BE309B73C" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_DebtInstrumentFairValue_966174C89EF09C4D342DB67BE309B73C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_C976F1CFA2BFCEAD4EF9B67BE309D79D" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_C976F1CFA2BFCEAD4EF9B67BE309D79D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_D7BDE6174474F81D04C6B67BE30AFE0C" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_LongTermDebtCurrent_D7BDE6174474F81D04C6B67BE30AFE0C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_8D309C2AF3E7217887CFB67BE30A1C05" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4B560A1E4A09A0E497F0B67BE3085131" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_8D309C2AF3E7217887CFB67BE30A1C05" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/DebtAndCreditAgreementsNarrativeDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_5462F2F282595EE7AA14B6A042F9DF39" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_us-gaap_DebtInstrumentTable_5462F2F282595EE7AA14B6A042F9DF39" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="loc_us-gaap_LineOfCreditFacilityAxis_EDAAA58A36789F0AF4ABB6A042F9DD6B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_5462F2F282595EE7AA14B6A042F9DF39" xlink:to="loc_us-gaap_LineOfCreditFacilityAxis_EDAAA58A36789F0AF4ABB6A042F9DD6B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_E0891D69F1D34D7FB042B6A042F91090_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_EDAAA58A36789F0AF4ABB6A042F9DD6B" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_E0891D69F1D34D7FB042B6A042F91090_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LineOfCreditFacilityLenderDomain" xlink:label="loc_us-gaap_LineOfCreditFacilityLenderDomain_E0891D69F1D34D7FB042B6A042F91090" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LineOfCreditFacilityAxis_EDAAA58A36789F0AF4ABB6A042F9DD6B" xlink:to="loc_us-gaap_LineOfCreditFacilityLenderDomain_E0891D69F1D34D7FB042B6A042F91090" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UncommittedCreditFacilityMember" xlink:label="loc_ipg_UncommittedCreditFacilityMember_456FE3A5FB372D5F521EB6A042F9681A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLenderDomain_E0891D69F1D34D7FB042B6A042F91090" xlink:to="loc_ipg_UncommittedCreditFacilityMember_456FE3A5FB372D5F521EB6A042F9681A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_E2CC55BF9450BFC49C52B6A042F9E68B" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_5462F2F282595EE7AA14B6A042F9DF39" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_E2CC55BF9450BFC49C52B6A042F9E68B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_166B0CD34D1E0C509B43B6A042FA01CA_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_E2CC55BF9450BFC49C52B6A042F9E68B" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_166B0CD34D1E0C509B43B6A042FA01CA_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_166B0CD34D1E0C509B43B6A042FA01CA" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_E2CC55BF9450BFC49C52B6A042F9E68B" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_166B0CD34D1E0C509B43B6A042FA01CA" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt4.20NotesMember" xlink:label="loc_ipg_UnsecuredDebt4.20NotesMember_4265A715F7C918030170B6A042FA8107" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_166B0CD34D1E0C509B43B6A042FA01CA" xlink:to="loc_ipg_UnsecuredDebt4.20NotesMember_4265A715F7C918030170B6A042FA8107" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt6.25NoteMember" xlink:label="loc_ipg_UnsecuredDebt6.25NoteMember_25737B6DF23AABC52359B6A042FA4AE4" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_166B0CD34D1E0C509B43B6A042FA01CA" xlink:to="loc_ipg_UnsecuredDebt6.25NoteMember_25737B6DF23AABC52359B6A042FA4AE4" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt3.75NoteMember" xlink:label="loc_ipg_UnsecuredDebt3.75NoteMember_DE8D9E8C591B4ABEE032B6A042FA6992" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_166B0CD34D1E0C509B43B6A042FA01CA" xlink:to="loc_ipg_UnsecuredDebt3.75NoteMember_DE8D9E8C591B4ABEE032B6A042FA6992" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt10.0NoteMember" xlink:label="loc_ipg_UnsecuredDebt10.0NoteMember_2CBAD800BAE3C65B934FB6A042FA732C" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_166B0CD34D1E0C509B43B6A042FA01CA" xlink:to="loc_ipg_UnsecuredDebt10.0NoteMember_2CBAD800BAE3C65B934FB6A042FA732C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_014C985713EAF6574BCCB6A042FAFC06" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_014C985713EAF6574BCCB6A042FAFC06" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_9E10890B86007D0FDA0DB6A042FA716B" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_9E10890B86007D0FDA0DB6A042FA716B" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_RepurchasePricePercentageDueToChangeOfControl" xlink:label="loc_ipg_RepurchasePricePercentageDueToChangeOfControl_95648584905B1CAE8771B6A042FA16EF" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_ipg_RepurchasePricePercentageDueToChangeOfControl_95648584905B1CAE8771B6A042FA16EF" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_LineofCreditFacilityWeightedAverageInterestRate" xlink:label="loc_ipg_LineofCreditFacilityWeightedAverageInterestRate_96D1EDFA0D03FCEF1199B6A042FA31C4" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_ipg_LineofCreditFacilityWeightedAverageInterestRate_96D1EDFA0D03FCEF1199B6A042FA31C4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtIssuanceCosts" xlink:label="loc_us-gaap_DebtIssuanceCosts_4E0CE33DDE8466CF95CFB6A042FA3620" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_us-gaap_DebtIssuanceCosts_4E0CE33DDE8466CF95CFB6A042FA3620" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FeesAndCommissions" xlink:label="loc_us-gaap_FeesAndCommissions_8B308C9FF39291C0375BB6A042FA3F54" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_us-gaap_FeesAndCommissions_8B308C9FF39291C0375BB6A042FA3F54" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_41BED4D7B655F318BD2BB6A042FAEB40" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_41BED4D7B655F318BD2BB6A042FAEB40" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_E2C9AE6CD4CB8207C5B6B6A042FA918A" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_E2C9AE6CD4CB8207C5B6B6A042FA918A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_F5466AD093AC9AAEE9DEB6A042FA665E" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4C56C302FE239754B90CB6A042FA3E66" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_F5466AD093AC9AAEE9DEB6A042FA665E" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/DebtAndCreditAgreementsNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/DebtAndCreditAgreementsTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/DocumentAndEntityInformationDocument" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/EarningsPerShareBasicAndDilutedDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_FF664817C3B8BA8E996CB680BD24FB14" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_StatementTable_FF664817C3B8BA8E996CB680BD24FB14" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_60CB863B6C6505A82712B680BD24CAE8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_FF664817C3B8BA8E996CB680BD24FB14" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_60CB863B6C6505A82712B680BD24CAE8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_460E542A99716D695D9FB680BD259888_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_60CB863B6C6505A82712B680BD24CAE8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_460E542A99716D695D9FB680BD259888_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_460E542A99716D695D9FB680BD259888" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_60CB863B6C6505A82712B680BD24CAE8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_460E542A99716D695D9FB680BD259888" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ConvertibleDebtSecuritiesTwoMember" xlink:label="loc_ipg_ConvertibleDebtSecuritiesTwoMember_93801168D3DFC058D0A1B680BD252F63" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_460E542A99716D695D9FB680BD259888" xlink:to="loc_ipg_ConvertibleDebtSecuritiesTwoMember_93801168D3DFC058D0A1B680BD252F63" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ConvertibleDebtSecuritiesMember" xlink:label="loc_us-gaap_ConvertibleDebtSecuritiesMember_55A96941876A94F5EEEAB680BD26F74D" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_460E542A99716D695D9FB680BD259888" xlink:to="loc_us-gaap_ConvertibleDebtSecuritiesMember_55A96941876A94F5EEEAB680BD26F74D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_CBA661E8089A51DFC592B680BD271CA5" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_CBA661E8089A51DFC592B680BD271CA5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_43837B67429CD81951B5B680BD29EEBE" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_43837B67429CD81951B5B680BD29EEBE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestOnConvertibleDebtNetOfTax" xlink:label="loc_us-gaap_InterestOnConvertibleDebtNetOfTax_7226D9AF94CC7A858574B680BD2940EF" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_InterestOnConvertibleDebtNetOfTax_7226D9AF94CC7A858574B680BD2940EF" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PreferredStockDividendsEffectOfDilutiveSecurities" xlink:label="loc_ipg_PreferredStockDividendsEffectOfDilutiveSecurities_A3A89A1C353FC5B6C169B680BD2A99C1" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_ipg_PreferredStockDividendsEffectOfDilutiveSecurities_A3A89A1C353FC5B6C169B680BD2A99C1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_C708C3FB330E2F8732FDB680BD2ACBBD" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_C708C3FB330E2F8732FDB680BD2ACBBD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_669C06DC5103A6BFFBF9B680BD2BE180" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_669C06DC5103A6BFFBF9B680BD2BE180" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_E8BA06521DAB0E1C2B4FB680BD2B9994" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_E8BA06521DAB0E1C2B4FB680BD2B9994" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_45606BCDDB665B980C62B680BD2B17D9" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfDebtSecurities_45606BCDDB665B980C62B680BD2B17D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock_557DD401F790BEFD0098B680BD2CC128" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock_557DD401F790BEFD0098B680BD2CC128" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_EEA767CB0F7FFD285462B680BD2C1F10" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_EEA767CB0F7FFD285462B680BD2C1F10" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_C085EFEA71CA5912B17EB680BD2DF5A8" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_EarningsPerShareBasic_C085EFEA71CA5912B17EB680BD2DF5A8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_A9F97F236E48CA45C71FB680BD2D23EB" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_BA6597A207CEDCE4B474B680BD26EB57" xlink:to="loc_us-gaap_EarningsPerShareDiluted_A9F97F236E48CA45C71FB680BD2D23EB" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/EarningsPerShareNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/EarningsPerShareTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/EmployeeBenefitsAllocationOfPlanAssetsDetails" xlink:type="extended">
    <loc xlink:href="ipg-20141231.xsd#ipg_AllocationOfPlanAssetsLineItems" xlink:label="loc_ipg_AllocationOfPlanAssetsLineItems_B1A6FA71C6D9F6EED88B7B967B9560EC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F5A06EDAE6A6CFE0CDBF7B967B94A76B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ipg_AllocationOfPlanAssetsLineItems_B1A6FA71C6D9F6EED88B7B967B9560EC" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F5A06EDAE6A6CFE0CDBF7B967B94A76B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_9A0D0A330882FED8D1A17B967B9415AB" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F5A06EDAE6A6CFE0CDBF7B967B94A76B" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_9A0D0A330882FED8D1A17B967B9415AB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_C0B73593CEA3F01DACA77B967B949B36_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_9A0D0A330882FED8D1A17B967B9415AB" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_C0B73593CEA3F01DACA77B967B949B36_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_C0B73593CEA3F01DACA77B967B949B36" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_9A0D0A330882FED8D1A17B967B9415AB" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_C0B73593CEA3F01DACA77B967B949B36" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_925D8BD3A9BD8B9120E07B967B94D73A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C0B73593CEA3F01DACA77B967B949B36" xlink:to="loc_us-gaap_EquitySecuritiesMember_925D8BD3A9BD8B9120E07B967B94D73A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FixedIncomeSecuritiesMember" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_21FE3E65DB51B06CE88D7B967B9440B1" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C0B73593CEA3F01DACA77B967B949B36" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_21FE3E65DB51B06CE88D7B967B9440B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RealEstateMember" xlink:label="loc_us-gaap_RealEstateMember_2CAAB3DAF5B6B50F8F5B7B967B95FD97" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C0B73593CEA3F01DACA77B967B949B36" xlink:to="loc_us-gaap_RealEstateMember_2CAAB3DAF5B6B50F8F5B7B967B95FD97" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_OtherPlanAssetsMember" xlink:label="loc_ipg_OtherPlanAssetsMember_8F458FF711C58A0485247B967B95DC77" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C0B73593CEA3F01DACA77B967B949B36" xlink:to="loc_ipg_OtherPlanAssetsMember_8F458FF711C58A0485247B967B95DC77" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations" xlink:label="loc_us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations_DF4C64E5C87BFEE49CC07B967B9543A3" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_AllocationOfPlanAssetsLineItems_B1A6FA71C6D9F6EED88B7B967B9560EC" xlink:to="loc_us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations_DF4C64E5C87BFEE49CC07B967B9543A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_84C0CDA43E1AEC2B6B0C7B967B959A0B" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_AllocationOfPlanAssetsLineItems_B1A6FA71C6D9F6EED88B7B967B9560EC" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_84C0CDA43E1AEC2B6B0C7B967B959A0B" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/EmployeeBenefitsDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/EmployeeBenefitsNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/FairValueMeasurementsNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/FairValueMeasurementsTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/FairValueOfPensionPlanAssetsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5A631909754ED2C89CE97B9679378646" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_DE56A7CF7664BEE4A42C7B96792EFFD1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5A631909754ED2C89CE97B9679378646" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_DE56A7CF7664BEE4A42C7B96792EFFD1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_35DC173C6819CCE072DE7B96792F042A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_DE56A7CF7664BEE4A42C7B96792EFFD1" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_35DC173C6819CCE072DE7B96792F042A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_2227A972522AC10BCEEC7B96792FF8B8_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_35DC173C6819CCE072DE7B96792F042A" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_2227A972522AC10BCEEC7B96792FF8B8_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_2227A972522AC10BCEEC7B96792FF8B8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_35DC173C6819CCE072DE7B96792F042A" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_2227A972522AC10BCEEC7B96792FF8B8" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_InvestmentFundMember" xlink:label="loc_ipg_InvestmentFundMember_2591703B262D35C2AAED7B96792F5D63" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_2227A972522AC10BCEEC7B96792FF8B8" xlink:to="loc_ipg_InvestmentFundMember_2591703B262D35C2AAED7B96792F5D63" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InsuranceContractRightsAndObligationsFairValueOptionMember" xlink:label="loc_us-gaap_InsuranceContractRightsAndObligationsFairValueOptionMember_B2E4A079EFD304E2A9537B96792F9469" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_2227A972522AC10BCEEC7B96792FF8B8" xlink:to="loc_us-gaap_InsuranceContractRightsAndObligationsFairValueOptionMember_B2E4A079EFD304E2A9537B96792F9469" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PartnershipInterestMember" xlink:label="loc_us-gaap_PartnershipInterestMember_EB5BBFBBED201BD63FF17B967935D6D7" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_2227A972522AC10BCEEC7B96792FF8B8" xlink:to="loc_us-gaap_PartnershipInterestMember_EB5BBFBBED201BD63FF17B967935D6D7" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_OtherPlanAssetsMember" xlink:label="loc_ipg_OtherPlanAssetsMember_3DFF023FC6D603811FC87B9679356FE5" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_2227A972522AC10BCEEC7B96792FF8B8" xlink:to="loc_ipg_OtherPlanAssetsMember_3DFF023FC6D603811FC87B9679356FE5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B79DC57D8D68EBBF84377B9679358718" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_DE56A7CF7664BEE4A42C7B96792EFFD1" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B79DC57D8D68EBBF84377B9679358718" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B60DCC34BA1BB8C1DAF17B967936D8D2_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B79DC57D8D68EBBF84377B9679358718" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B60DCC34BA1BB8C1DAF17B967936D8D2_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B60DCC34BA1BB8C1DAF17B967936D8D2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_B79DC57D8D68EBBF84377B9679358718" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B60DCC34BA1BB8C1DAF17B967936D8D2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_41296F4DACDEC127BB537B9679365A7B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B60DCC34BA1BB8C1DAF17B967936D8D2" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_41296F4DACDEC127BB537B9679365A7B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_8777359EF947F87D2AEA7B967937E2F7" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B60DCC34BA1BB8C1DAF17B967936D8D2" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_8777359EF947F87D2AEA7B967937E2F7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_D6847B6B8095C742AFFE7B967937B688" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B60DCC34BA1BB8C1DAF17B967936D8D2" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_D6847B6B8095C742AFFE7B967937B688" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_1C103A169027440971EE7B967937809A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5A631909754ED2C89CE97B9679378646" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_1C103A169027440971EE7B967937809A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_D8816896841F7E9FF7E17B9679378E33" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5A631909754ED2C89CE97B9679378646" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_D8816896841F7E9FF7E17B9679378E33" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_03F89C0AF52F757468417B967937E1CE" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_5A631909754ED2C89CE97B9679378646" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_03F89C0AF52F757468417B967937E1CE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_E604950758E21D0E79537B96793849C1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_03F89C0AF52F757468417B967937E1CE" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_E604950758E21D0E79537B96793849C1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_0FCA6A01191237AF4D337B967938EDF7" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_03F89C0AF52F757468417B967937E1CE" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_0FCA6A01191237AF4D337B967938EDF7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements" xlink:label="loc_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_221ABD35A2EB3C75C46F7B9679389C1A" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsAbstract_03F89C0AF52F757468417B967937E1CE" xlink:to="loc_us-gaap_DefinedBenefitPlanPurchasesSalesAndSettlements_221ABD35A2EB3C75C46F7B9679389C1A" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/FairValueOnNonrecurringBasisDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_B56FB13BA9306D3ABDEAA4DA645F4221" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_DE0F6837FF6C466AE076A4DA645EC066" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_B56FB13BA9306D3ABDEAA4DA645F4221" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_DE0F6837FF6C466AE076A4DA645EC066" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_9C01AE4004DECF9C1662A4DA645F0002" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_DE0F6837FF6C466AE076A4DA645EC066" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_9C01AE4004DECF9C1662A4DA645F0002" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B9075F1221CEF1BBC3F7A4DA645F5A4F_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_9C01AE4004DECF9C1662A4DA645F0002" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B9075F1221CEF1BBC3F7A4DA645F5A4F_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B9075F1221CEF1BBC3F7A4DA645F5A4F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_9C01AE4004DECF9C1662A4DA645F0002" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B9075F1221CEF1BBC3F7A4DA645F5A4F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_8DCCABE339500AD1C6D4A4DA645FBCD8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B9075F1221CEF1BBC3F7A4DA645F5A4F" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_8DCCABE339500AD1C6D4A4DA645FBCD8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_092E6C2E298063504766A4DA645FC8AA" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B9075F1221CEF1BBC3F7A4DA645F5A4F" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_092E6C2E298063504766A4DA645FC8AA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_CD0E8A0C4FB23410BC36A4DA645FC035" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B9075F1221CEF1BBC3F7A4DA645F5A4F" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_CD0E8A0C4FB23410BC36A4DA645FC035" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_D0ABC6D8ABD13A689DB0A4DA645F0F86" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_B9075F1221CEF1BBC3F7A4DA645F5A4F" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_D0ABC6D8ABD13A689DB0A4DA645F0F86" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="loc_us-gaap_DebtInstrumentFairValue_D514F1EE9745F616EB90A4DA645FC0A3" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_B56FB13BA9306D3ABDEAA4DA645F4221" xlink:to="loc_us-gaap_DebtInstrumentFairValue_D514F1EE9745F616EB90A4DA645FC0A3" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/FairValueOnRecurringBasisDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_61401D0046D2845E842DA33A6635D38F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F970A11AEF34C9E0A440A33A66346E80" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_61401D0046D2845E842DA33A6635D38F" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F970A11AEF34C9E0A440A33A66346E80" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_93760903C77277877D1FA33A66346A92" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_F970A11AEF34C9E0A440A33A66346E80" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_93760903C77277877D1FA33A66346A92" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7D1A2FE96874EF4AB7D5A33A6634EAC4_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_93760903C77277877D1FA33A66346A92" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7D1A2FE96874EF4AB7D5A33A6634EAC4_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7D1A2FE96874EF4AB7D5A33A6634EAC4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_93760903C77277877D1FA33A66346A92" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7D1A2FE96874EF4AB7D5A33A6634EAC4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_74D36A3AFA3BF124DA84A33A66346897" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7D1A2FE96874EF4AB7D5A33A6634EAC4" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_74D36A3AFA3BF124DA84A33A66346897" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_6B39E4C8ED21FFD907CEA33A66347502" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7D1A2FE96874EF4AB7D5A33A6634EAC4" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_6B39E4C8ED21FFD907CEA33A66347502" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_5FFAD0C13F31709D6DFCA33A6634CFCC" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7D1A2FE96874EF4AB7D5A33A6634EAC4" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_5FFAD0C13F31709D6DFCA33A6634CFCC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_19384E022124DA028FB1A33A6635BE96" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7D1A2FE96874EF4AB7D5A33A6634EAC4" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_19384E022124DA028FB1A33A6635BE96" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringReserve" xlink:label="loc_us-gaap_RestructuringReserve_CEDDC25FF4A470558339A33A6635FE0D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_61401D0046D2845E842DA33A6635D38F" xlink:to="loc_us-gaap_RestructuringReserve_CEDDC25FF4A470558339A33A6635FE0D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_517AC690E77201B57E6EA33A663583EA" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_61401D0046D2845E842DA33A6635D38F" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_517AC690E77201B57E6EA33A663583EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_8E7C11C46409FFB86035A33A6635A8B2" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_61401D0046D2845E842DA33A6635D38F" xlink:to="loc_us-gaap_AvailableForSaleSecurities_8E7C11C46409FFB86035A33A6635A8B2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_9DF090CEA8E12D64BBC8A33A66355C2B" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_61401D0046D2845E842DA33A6635D38F" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_9DF090CEA8E12D64BBC8A33A66355C2B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AssetsFairValueDisclosureRecurring" xlink:label="loc_us-gaap_AssetsFairValueDisclosureRecurring_D1981D9D2789F2FB4612A33A66359F64" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_61401D0046D2845E842DA33A6635D38F" xlink:to="loc_us-gaap_AssetsFairValueDisclosureRecurring_D1981D9D2789F2FB4612A33A66359F64" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_FairValueOfAssetsMeasuredOnRecurringBasisPercentageOfTotalAssets" xlink:label="loc_ipg_FairValueOfAssetsMeasuredOnRecurringBasisPercentageOfTotalAssets_1824F13D721EF3A25895A33A66353367" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_61401D0046D2845E842DA33A6635D38F" xlink:to="loc_ipg_FairValueOfAssetsMeasuredOnRecurringBasisPercentageOfTotalAssets_1824F13D721EF3A25895A33A66353367" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_MandatorilyRedeemableNoncontrollingInterestsFairValueDisclosure" xlink:label="loc_ipg_MandatorilyRedeemableNoncontrollingInterestsFairValueDisclosure_3693B69908A1430DEC63A33A6635A167" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_61401D0046D2845E842DA33A6635D38F" xlink:to="loc_ipg_MandatorilyRedeemableNoncontrollingInterestsFairValueDisclosure_3693B69908A1430DEC63A33A6635A167" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/FairValueUnobservableInputsDetails" xlink:type="extended">
    <loc xlink:href="ipg-20141231.xsd#ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_3783BB418FD9B1E1C8A17B967AAFA505" xlink:type="locator" />
    <loc xlink:href="ipg-20141231.xsd#ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_003C7FE70F8754A036447B967AAFAB7F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_3783BB418FD9B1E1C8A17B967AAFA505" xlink:to="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_003C7FE70F8754A036447B967AAFAB7F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_745F1354ADB72D9D06877B967AAF0E98" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_003C7FE70F8754A036447B967AAFAB7F" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_745F1354ADB72D9D06877B967AAF0E98" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_B186EB846E8C1711BC907B967AAFD318_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_745F1354ADB72D9D06877B967AAF0E98" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_B186EB846E8C1711BC907B967AAFD318_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_B186EB846E8C1711BC907B967AAFD318" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_745F1354ADB72D9D06877B967AAF0E98" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_B186EB846E8C1711BC907B967AAFD318" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_MandatorilyRedeemableNoncontrollingInterestsMember" xlink:label="loc_ipg_MandatorilyRedeemableNoncontrollingInterestsMember_5147E8BC322B077F95377B967AAF17F2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_B186EB846E8C1711BC907B967AAFD318" xlink:to="loc_ipg_MandatorilyRedeemableNoncontrollingInterestsMember_5147E8BC322B077F95377B967AAF17F2" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_MandatorilyRedeemableNoncontrollingInterestsFairValueDisclosure" xlink:label="loc_ipg_MandatorilyRedeemableNoncontrollingInterestsFairValueDisclosure_F5BFB2B4D8AAA37725D07B967AAF8608" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_3783BB418FD9B1E1C8A17B967AAFA505" xlink:to="loc_ipg_MandatorilyRedeemableNoncontrollingInterestsFairValueDisclosure_F5BFB2B4D8AAA37725D07B967AAF8608" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_102842B81DE4EA866C0E7B967AAF43EB" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_3783BB418FD9B1E1C8A17B967AAFA505" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_102842B81DE4EA866C0E7B967AAF43EB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_7FE9F6875B88D89567E67B967AB0F3AC" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_3783BB418FD9B1E1C8A17B967AAFA505" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_7FE9F6875B88D89567E67B967AB0F3AC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_040E024CF68DA5459D597B967AB02039" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_3783BB418FD9B1E1C8A17B967AAFA505" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_040E024CF68DA5459D597B967AB02039" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisGainLossIncludedInOtherComprehensiveIncomeLoss" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisGainLossIncludedInOtherComprehensiveIncomeLoss_7BBE4A85A904FAD088277B967AB00A2F" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_FairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_3783BB418FD9B1E1C8A17B967AAFA505" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisGainLossIncludedInOtherComprehensiveIncomeLoss_7BBE4A85A904FAD088277B967AB00A2F" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/FutureMinimumLeasePaymentsDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/GoodwillDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_018CB72695BE307F826498847B654806" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfGoodwillTable" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_B1AF9138EBEA307CF3AE98847B65006E" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_018CB72695BE307F826498847B654806" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_B1AF9138EBEA307CF3AE98847B65006E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_DC83888DA6C8FAB3A33F98847B65B0C9" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_B1AF9138EBEA307CF3AE98847B65006E" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_DC83888DA6C8FAB3A33F98847B65B0C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C05B62FF9EAC659FD33A98847B65FCFC_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_DC83888DA6C8FAB3A33F98847B65B0C9" xlink:to="loc_us-gaap_SegmentDomain_C05B62FF9EAC659FD33A98847B65FCFC_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_C05B62FF9EAC659FD33A98847B65FCFC" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_DC83888DA6C8FAB3A33F98847B65B0C9" xlink:to="loc_us-gaap_SegmentDomain_C05B62FF9EAC659FD33A98847B65FCFC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllOtherSegmentsMember" xlink:label="loc_us-gaap_AllOtherSegmentsMember_D6D412CC0D00EE586AEA98847B659AA4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C05B62FF9EAC659FD33A98847B65FCFC" xlink:to="loc_us-gaap_AllOtherSegmentsMember_D6D412CC0D00EE586AEA98847B659AA4" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ReportableSegmentsTwoMember" xlink:label="loc_ipg_ReportableSegmentsTwoMember_8D541392BE6A87841C4A98847B65FAC3" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_C05B62FF9EAC659FD33A98847B65FCFC" xlink:to="loc_ipg_ReportableSegmentsTwoMember_8D541392BE6A87841C4A98847B65FAC3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_5180F5895641DBF4D13198847B653BFE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_018CB72695BE307F826498847B654806" xlink:to="loc_us-gaap_Goodwill_5180F5895641DBF4D13198847B653BFE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_39ACBE58F3745552907098847B656AD0" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_018CB72695BE307F826498847B654806" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_39ACBE58F3745552907098847B656AD0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GoodwillOtherChanges" xlink:label="loc_us-gaap_GoodwillOtherChanges_883F5E388F32C0CFB4AB98847B650C6E" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_018CB72695BE307F826498847B654806" xlink:to="loc_us-gaap_GoodwillOtherChanges_883F5E388F32C0CFB4AB98847B650C6E" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/GuaranteesDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/IncentiveCompensationPlansEmployeeStockPurchasePlansDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_751870137EBDC6FC736FA928E45DC516" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_31522898333EFFA1B33DA928E45D21A1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_751870137EBDC6FC736FA928E45DC516" xlink:to="loc_us-gaap_StatementTable_31522898333EFFA1B33DA928E45D21A1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_974020CF34F1D74CC641A928E45D3ED6" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_31522898333EFFA1B33DA928E45D21A1" xlink:to="loc_us-gaap_AwardTypeAxis_974020CF34F1D74CC641A928E45D3ED6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BC54A0D5D11FE4DE0B9EA928E45D32C6_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_974020CF34F1D74CC641A928E45D3ED6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BC54A0D5D11FE4DE0B9EA928E45D32C6_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BC54A0D5D11FE4DE0B9EA928E45D32C6" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_974020CF34F1D74CC641A928E45D3ED6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BC54A0D5D11FE4DE0B9EA928E45D32C6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_D282BDA1F6FFF45CC640A928E45D8465" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BC54A0D5D11FE4DE0B9EA928E45D32C6" xlink:to="loc_us-gaap_EmployeeStockMember_D282BDA1F6FFF45CC640A928E45D8465" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_7E123F519C02901E021AA928E45D2F83" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_751870137EBDC6FC736FA928E45DC516" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_7E123F519C02901E021AA928E45D2F83" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee_BE38380026D4F435AF53A928E45DEB0C" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_751870137EBDC6FC736FA928E45DC516" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumNumberOfSharesPerEmployee_BE38380026D4F435AF53A928E45DEB0C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOwnershipPlanESOPPlanDescription" xlink:label="loc_us-gaap_EmployeeStockOwnershipPlanESOPPlanDescription_1110A8872C73A402E0C6A928E45D0407" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_751870137EBDC6FC736FA928E45DC516" xlink:to="loc_us-gaap_EmployeeStockOwnershipPlanESOPPlanDescription_1110A8872C73A402E0C6A928E45D0407" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_A3BA90CE0A86030A9264A928E45D7B24" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_751870137EBDC6FC736FA928E45DC516" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_A3BA90CE0A86030A9264A928E45D7B24" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_C9A616D95DE43F4C46CDA928E45D27E2" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_751870137EBDC6FC736FA928E45DC516" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_C9A616D95DE43F4C46CDA928E45D27E2" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/IncentiveCompensationPlansNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/IncentiveCompensationPlansStockOptionActivityDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C9FB320458977F81FA6CB577654801D7" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C9FB320458977F81FA6CB577654801D7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_B33F09777B8732D919E8B57765480038" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C9FB320458977F81FA6CB577654801D7" xlink:to="loc_us-gaap_AwardTypeAxis_B33F09777B8732D919E8B57765480038" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D861C5451498E199B796B577654E0E2B_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_B33F09777B8732D919E8B57765480038" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D861C5451498E199B796B577654E0E2B_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D861C5451498E199B796B577654E0E2B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_B33F09777B8732D919E8B57765480038" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D861C5451498E199B796B577654E0E2B" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PerformanceBasedCashAwardsSettledInSharesMember" xlink:label="loc_ipg_PerformanceBasedCashAwardsSettledInSharesMember_263CC84F21EE837F6FB3B577654EF120" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D861C5451498E199B796B577654E0E2B" xlink:to="loc_ipg_PerformanceBasedCashAwardsSettledInSharesMember_263CC84F21EE837F6FB3B577654EF120" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_DA009EB8D7A9CF11694CB577654E1BBB" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C9FB320458977F81FA6CB577654801D7" xlink:to="loc_us-gaap_RangeAxis_DA009EB8D7A9CF11694CB577654E1BBB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_701116D9FC6181ABA5DDB577654EDDC8_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_DA009EB8D7A9CF11694CB577654E1BBB" xlink:to="loc_us-gaap_RangeMember_701116D9FC6181ABA5DDB577654EDDC8_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_701116D9FC6181ABA5DDB577654EDDC8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_DA009EB8D7A9CF11694CB577654E1BBB" xlink:to="loc_us-gaap_RangeMember_701116D9FC6181ABA5DDB577654EDDC8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_VestingAxis" xlink:label="loc_us-gaap_VestingAxis_AAB5ADD254D91C287B07B577654EF662" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_C9FB320458977F81FA6CB577654801D7" xlink:to="loc_us-gaap_VestingAxis_AAB5ADD254D91C287B07B577654EF662" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_VestingDomain" xlink:label="loc_us-gaap_VestingDomain_DAC28FA171F2E6E0AA57B577654ED4AD_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_AAB5ADD254D91C287B07B577654EF662" xlink:to="loc_us-gaap_VestingDomain_DAC28FA171F2E6E0AA57B577654ED4AD_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_VestingDomain" xlink:label="loc_us-gaap_VestingDomain_DAC28FA171F2E6E0AA57B577654ED4AD" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_AAB5ADD254D91C287B07B577654EF662" xlink:to="loc_us-gaap_VestingDomain_DAC28FA171F2E6E0AA57B577654ED4AD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_E254FE2079A7D4177FA0B5776554CE10" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_DAC28FA171F2E6E0AA57B577654ED4AD" xlink:to="loc_us-gaap_EmployeeStockOptionMember_E254FE2079A7D4177FA0B5776554CE10" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_EmployeeStockOptionNonvestedMember" xlink:label="loc_ipg_EmployeeStockOptionNonvestedMember_F52C586E27FDCEF631AEB577655525CB" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_DAC28FA171F2E6E0AA57B577654ED4AD" xlink:to="loc_ipg_EmployeeStockOptionNonvestedMember_F52C586E27FDCEF631AEB577655525CB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_1C5042BDCC0B25241772B577655546D8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_1C5042BDCC0B25241772B577655546D8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_FE69B2D45BA4738EE8C6B5776555BB85" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_FE69B2D45BA4738EE8C6B5776555BB85" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_547ED4C38ACC5FCE7D7BB57765557E30" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_547ED4C38ACC5FCE7D7BB57765557E30" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_9048C5B6C665C47B9577B57765552D15" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_9048C5B6C665C47B9577B57765552D15" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_D331521026E861D839A6B5776556BD3B" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_D331521026E861D839A6B5776556BD3B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_929461F5E678DAEB0D16B5776556029D" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_929461F5E678DAEB0D16B5776556029D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_C80CFF17EDA60266FAD3B5776556ADA3" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_C80CFF17EDA60266FAD3B5776556ADA3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_03D5468FAC2E05D3CEBCB57765564817" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_03D5468FAC2E05D3CEBCB57765564817" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_C60A53C9EB75B3AAC142B57765563605" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_C60A53C9EB75B3AAC142B57765563605" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_DA41D9175F0CC4B0E7F6B57765573535" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_DA41D9175F0CC4B0E7F6B57765573535" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_225C10E8BF55C3657063B5776557D0B8" xlink:type="locator" />
    <definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_225C10E8BF55C3657063B5776557D0B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_FAAD41CF09C46FE5ED20B5776557A7F9" xlink:type="locator" />
    <definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_FAAD41CF09C46FE5ED20B5776557A7F9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_E28DD3B1E18B912A4E56B577655C3E21" xlink:type="locator" />
    <definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_E28DD3B1E18B912A4E56B577655C3E21" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_0CA1DBE9561AC566014AB577655CD7CE" xlink:type="locator" />
    <definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_0CA1DBE9561AC566014AB577655CD7CE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_D9E744390D6265BF29BEB577655D991F" xlink:type="locator" />
    <definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_D9E744390D6265BF29BEB577655D991F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_1301B2571BCE1463199DB577655D8DE8" xlink:type="locator" />
    <definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_1301B2571BCE1463199DB577655D8DE8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_F179697124CDB8427869B577655D92C5" xlink:type="locator" />
    <definitionArc order="19" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_F179697124CDB8427869B577655D92C5" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_StockOptionsVestedDuringPeriod" xlink:label="loc_ipg_StockOptionsVestedDuringPeriod_19F71EA0348C6FF9C01BB577655E3B31" xlink:type="locator" />
    <definitionArc order="20" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_ipg_StockOptionsVestedDuringPeriod_19F71EA0348C6FF9C01BB577655E3B31" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_StockOptionsVestedWeightedAverageGrantDateFairValue" xlink:label="loc_ipg_StockOptionsVestedWeightedAverageGrantDateFairValue_B9FA014F62D57D60F478B577655EFB06" xlink:type="locator" />
    <definitionArc order="21" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_ipg_StockOptionsVestedWeightedAverageGrantDateFairValue_B9FA014F62D57D60F478B577655EFB06" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_5D654E0507EDAC10A032B577655E5A5F" xlink:type="locator" />
    <definitionArc order="22" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_5D654E0507EDAC10A032B577655E5A5F" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ProceedsfromStockOptionsExercisedincludingTaxesWithheld" xlink:label="loc_ipg_ProceedsfromStockOptionsExercisedincludingTaxesWithheld_AEB984F7E00802200702B577655EFFC1" xlink:type="locator" />
    <definitionArc order="23" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_ipg_ProceedsfromStockOptionsExercisedincludingTaxesWithheld_AEB984F7E00802200702B577655EFFC1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_E6B00FAC514E3AA679D2B577655EF54C" xlink:type="locator" />
    <definitionArc order="24" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_E6B00FAC514E3AA679D2B577655EF54C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_51533A1F610BDA750ABCB577655EB0D2" xlink:type="locator" />
    <definitionArc order="25" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_51533A1F610BDA750ABCB577655EB0D2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue_A3A3133A089F364CA52DB577655E928E" xlink:type="locator" />
    <definitionArc order="26" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_710CEC438545C995A2B6B5776555D49D" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue_A3A3133A089F364CA52DB577655E928E" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/IncentiveCompensationPlansTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/IncomeTaxesChangeInValuationAllowancesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_60F392F7338BA1E26720B3D92DEA5867" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_60F392F7338BA1E26720B3D92DEA5867" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_FB9AE82B72E3FD788FDAB3D92DEADD5C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_60F392F7338BA1E26720B3D92DEA5867" xlink:to="loc_us-gaap_RangeAxis_FB9AE82B72E3FD788FDAB3D92DEADD5C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_F515EA70AA5BC34ED895B3D92DEAE41D_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_FB9AE82B72E3FD788FDAB3D92DEADD5C" xlink:to="loc_us-gaap_RangeMember_F515EA70AA5BC34ED895B3D92DEAE41D_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_F515EA70AA5BC34ED895B3D92DEAE41D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_FB9AE82B72E3FD788FDAB3D92DEADD5C" xlink:to="loc_us-gaap_RangeMember_F515EA70AA5BC34ED895B3D92DEAE41D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_0F397722F2AB23661F5DB3D92DEA972B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_F515EA70AA5BC34ED895B3D92DEAE41D" xlink:to="loc_us-gaap_MinimumMember_0F397722F2AB23661F5DB3D92DEA972B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_DAD9A05C8B90915C5D03B3D92DEAAF7F" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_F515EA70AA5BC34ED895B3D92DEAE41D" xlink:to="loc_us-gaap_MaximumMember_DAD9A05C8B90915C5D03B3D92DEAAF7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_9D7B8146BFB23E5E6EF4B3D92DEAA2C9" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_60F392F7338BA1E26720B3D92DEA5867" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_9D7B8146BFB23E5E6EF4B3D92DEAA2C9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_489739F47AE3F8DD07D4B3D92DEA53B7_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_9D7B8146BFB23E5E6EF4B3D92DEAA2C9" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_489739F47AE3F8DD07D4B3D92DEA53B7_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_489739F47AE3F8DD07D4B3D92DEA53B7" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_9D7B8146BFB23E5E6EF4B3D92DEAA2C9" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_489739F47AE3F8DD07D4B3D92DEA53B7" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_4DA35B4C55617145DBE5B3D92DEAB21A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_489739F47AE3F8DD07D4B3D92DEA53B7" xlink:to="loc_us-gaap_ForeignCountryMember_4DA35B4C55617145DBE5B3D92DEAB21A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_786975B4AAF10E3F7AECB3D92DEAEC77" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_489739F47AE3F8DD07D4B3D92DEA53B7" xlink:to="loc_us-gaap_DomesticCountryMember_786975B4AAF10E3F7AECB3D92DEAEC77" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_6667DF2D1CF221C7FB45B3D92DEA6AEA" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_60F392F7338BA1E26720B3D92DEA5867" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_6667DF2D1CF221C7FB45B3D92DEA6AEA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_B7C26118E92128C2E0EDB3D92DEAADE1_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_6667DF2D1CF221C7FB45B3D92DEA6AEA" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_B7C26118E92128C2E0EDB3D92DEAADE1_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_B7C26118E92128C2E0EDB3D92DEAADE1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_6667DF2D1CF221C7FB45B3D92DEA6AEA" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_B7C26118E92128C2E0EDB3D92DEAADE1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TaxPeriodAxis" xlink:label="loc_us-gaap_TaxPeriodAxis_937202A32BFB6123B7BDB3D92DEAE516" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_60F392F7338BA1E26720B3D92DEA5867" xlink:to="loc_us-gaap_TaxPeriodAxis_937202A32BFB6123B7BDB3D92DEAE516" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TaxPeriodDomain" xlink:label="loc_us-gaap_TaxPeriodDomain_77FF19983F18FEB6DB65B3D92DEA8BE9_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxPeriodAxis_937202A32BFB6123B7BDB3D92DEAE516" xlink:to="loc_us-gaap_TaxPeriodDomain_77FF19983F18FEB6DB65B3D92DEA8BE9_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TaxPeriodDomain" xlink:label="loc_us-gaap_TaxPeriodDomain_77FF19983F18FEB6DB65B3D92DEA8BE9" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxPeriodAxis_937202A32BFB6123B7BDB3D92DEAE516" xlink:to="loc_us-gaap_TaxPeriodDomain_77FF19983F18FEB6DB65B3D92DEA8BE9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_6445EAF5857342B13C33B3D92DEED0E7" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_6445EAF5857342B13C33B3D92DEED0E7" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToCostsAndExpenses" xlink:label="loc_ipg_ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToCostsAndExpenses_A750EF0ED3609B93B2EEB3D92DEE1E05" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_ipg_ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToCostsAndExpenses_A750EF0ED3609B93B2EEB3D92DEE1E05" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToGrossTaxAssetsAndOtherAccounts" xlink:label="loc_ipg_ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToGrossTaxAssetsAndOtherAccounts_A4B5A3633708C6189A51B3D92DEEF28A" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_ipg_ValuationAllowanceDeferredTaxAssetChangeInAmountChargedReversedToGrossTaxAssetsAndOtherAccounts_A4B5A3633708C6189A51B3D92DEEF28A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExaminationYearUnderExamination" xlink:label="loc_us-gaap_IncomeTaxExaminationYearUnderExamination_E334F00A2F22DE90FEDFB3D92DEEFA9B" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_us-gaap_IncomeTaxExaminationYearUnderExamination_E334F00A2F22DE90FEDFB3D92DEEFA9B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLossCarryforwards" xlink:label="loc_us-gaap_OperatingLossCarryforwards_3DD9F7D0444C7C11D2D4B3D92DEE2668" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_us-gaap_OperatingLossCarryforwards_3DD9F7D0444C7C11D2D4B3D92DEE2668" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingLossCarryforwardsExpirationDate" xlink:label="loc_us-gaap_OperatingLossCarryforwardsExpirationDate_9175656D92645115793BB3D92DEE0203" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_us-gaap_OperatingLossCarryforwardsExpirationDate_9175656D92645115793BB3D92DEE0203" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration_0B71A856D4D582091E7FB3D92DEE0F74" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration_0B71A856D4D582091E7FB3D92DEE0F74" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration_AE1F174512B05708826EB3D92DEE3900" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration_AE1F174512B05708826EB3D92DEE3900" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_4A59062C29F9EEFFF7F8B3D92DEEF171" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1CE0EE8D679025FF1577B3D92DEEFB0E" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_4A59062C29F9EEFFF7F8B3D92DEEF171" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/IncomeTaxesTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/IntangibleAssets" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/IntangibleAssetsTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/NetPeriodicCostDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_6C3AEA3A62586F6D9463A27D05844496" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_6C3AEA3A62586F6D9463A27D05844496" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_94633496CA35D51C5BC1A27D05847960" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_6C3AEA3A62586F6D9463A27D05844496" xlink:to="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_94633496CA35D51C5BC1A27D05847960" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="loc_us-gaap_DefinedBenefitPlansDomain_7BAE32C32351DC2C74D8A27D05843328_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_94633496CA35D51C5BC1A27D05847960" xlink:to="loc_us-gaap_DefinedBenefitPlansDomain_7BAE32C32351DC2C74D8A27D05843328_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="loc_us-gaap_DefinedBenefitPlansDomain_7BAE32C32351DC2C74D8A27D05843328" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_94633496CA35D51C5BC1A27D05847960" xlink:to="loc_us-gaap_DefinedBenefitPlansDomain_7BAE32C32351DC2C74D8A27D05843328" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember" xlink:label="loc_us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember_94BFE2AB30C491CB34F4A27D05850C43" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_7BAE32C32351DC2C74D8A27D05843328" xlink:to="loc_us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember_94BFE2AB30C491CB34F4A27D05850C43" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignPensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_ForeignPensionPlansDefinedBenefitMember_DC49BB9FE686F95F91D2A27D05853C2C" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_7BAE32C32351DC2C74D8A27D05843328" xlink:to="loc_us-gaap_ForeignPensionPlansDefinedBenefitMember_DC49BB9FE686F95F91D2A27D05853C2C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember" xlink:label="loc_us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember_9B67F4CD88C6C0704D5AA27D05857D78" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_7BAE32C32351DC2C74D8A27D05843328" xlink:to="loc_us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember_9B67F4CD88C6C0704D5AA27D05857D78" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_3E3796685611A297740DA27D05856255" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_3E3796685611A297740DA27D05856255" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_B97D98A76F68BB9FEEA2A27D0586027E" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_3E3796685611A297740DA27D05856255" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_B97D98A76F68BB9FEEA2A27D0586027E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_B65E52CE4CB4CCAF1B22A27D0586D7C1" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_3E3796685611A297740DA27D05856255" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_B65E52CE4CB4CCAF1B22A27D0586D7C1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_D381F9F0DD9D21EF95CAA27D05862FED" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_3E3796685611A297740DA27D05856255" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_D381F9F0DD9D21EF95CAA27D05862FED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_8A2DF51BD2FDD27A02FDA27D05860ECC" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_3E3796685611A297740DA27D05856255" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_8A2DF51BD2FDD27A02FDA27D05860ECC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AdjustmentForAmortizationAbstract" xlink:label="loc_us-gaap_AdjustmentForAmortizationAbstract_154FB94C1694B50A49C1A27D05866A59" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_3E3796685611A297740DA27D05856255" xlink:to="loc_us-gaap_AdjustmentForAmortizationAbstract_154FB94C1694B50A49C1A27D05866A59" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets_6F4F64F9360E7E1D29B7A27D0587B02A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentForAmortizationAbstract_154FB94C1694B50A49C1A27D05866A59" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfTransitionObligationsAssets_6F4F64F9360E7E1D29B7A27D0587B02A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_5BDB0BB4AAD07475DF92A27D05873EB8" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentForAmortizationAbstract_154FB94C1694B50A49C1A27D05866A59" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_5BDB0BB4AAD07475DF92A27D05873EB8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_BA753DCB83A14B36A2AEA27D0587D69A" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentForAmortizationAbstract_154FB94C1694B50A49C1A27D05866A59" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_BA753DCB83A14B36A2AEA27D0587D69A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_6533994BD73DC997683CA27D05886D0F" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_3E3796685611A297740DA27D05856255" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_6533994BD73DC997683CA27D05886D0F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_6EAE07E98E07FB03A25AA27D0588EC51" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_6EAE07E98E07FB03A25AA27D0588EC51" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_2B7FA796B26F15BADB7FA27D05881A86" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_2B7FA796B26F15BADB7FA27D05881A86" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_552200F23FFA6B059D4EA27D0588AF97" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_552200F23FFA6B059D4EA27D0588AF97" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_E22D4BDF9AC30CCF4734A27D0588FDF3" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_E22D4BDF9AC30CCF4734A27D0588FDF3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_F2A4B30B13B16806B6FAA27D05889EDC" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_F2A4B30B13B16806B6FAA27D05889EDC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear_B4082E8BDF4717FE34DCA27D05895936" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear_B4082E8BDF4717FE34DCA27D05895936" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanYearThatRateReachesUltimateTrendRate" xlink:label="loc_us-gaap_DefinedBenefitPlanYearThatRateReachesUltimateTrendRate_EEBF0D6F95B154AD51F7A27D0589B540" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlanYearThatRateReachesUltimateTrendRate_EEBF0D6F95B154AD51F7A27D0589B540" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate" xlink:label="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate_82C2145FC38C2EE80CFFA27D05894885" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_C510F487CCDF00D2D7D1A27D0585CCF6" xlink:to="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate_82C2145FC38C2EE80CFFA27D05894885" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/NonVestedAwardActivityDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3F0A7D5BB85C2B30B558B57764B856B7" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3F0A7D5BB85C2B30B558B57764B856B7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_FE8BCA7CB690E971E8BDB57764B8EC36" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3F0A7D5BB85C2B30B558B57764B856B7" xlink:to="loc_us-gaap_AwardTypeAxis_FE8BCA7CB690E971E8BDB57764B8EC36" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_FE8BCA7CB690E971E8BDB57764B8EC36" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_FE8BCA7CB690E971E8BDB57764B8EC36" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_StockSettledAwardsMember" xlink:label="loc_ipg_StockSettledAwardsMember_F8FE6CA531F515755A83B57764B958F6" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944" xlink:to="loc_ipg_StockSettledAwardsMember_F8FE6CA531F515755A83B57764B958F6" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CashSettledAwardsMember" xlink:label="loc_ipg_CashSettledAwardsMember_F831153CBF47D0E2209BB57764B99504" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944" xlink:to="loc_ipg_CashSettledAwardsMember_F831153CBF47D0E2209BB57764B99504" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PerformanceBasedAwardsMember" xlink:label="loc_ipg_PerformanceBasedAwardsMember_3B140FCFB2A3976D890CB57764B96F7C" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944" xlink:to="loc_ipg_PerformanceBasedAwardsMember_3B140FCFB2A3976D890CB57764B96F7C" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PerformanceBasedCashAwardsSettledInSharesMember" xlink:label="loc_ipg_PerformanceBasedCashAwardsSettledInSharesMember_CEE6CBDACD60387EDCF7B57764B9E42C" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944" xlink:to="loc_ipg_PerformanceBasedCashAwardsSettledInSharesMember_CEE6CBDACD60387EDCF7B57764B9E42C" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_TimeBasedCashAwardsMember" xlink:label="loc_ipg_TimeBasedCashAwardsMember_B47D1C79759904C9EBDFB57764B9889F" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944" xlink:to="loc_ipg_TimeBasedCashAwardsMember_B47D1C79759904C9EBDFB57764B9889F" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PerformanceBasedCashAwardsMember" xlink:label="loc_ipg_PerformanceBasedCashAwardsMember_48BBDA3A1601762A983FB57764BAD31C" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944" xlink:to="loc_ipg_PerformanceBasedCashAwardsMember_48BBDA3A1601762A983FB57764BAD31C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_726DEF05E6A10F85F06EB57764BA4202" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_04EE6EF93A36A5145CC9B57764B99944" xlink:to="loc_us-gaap_EmployeeStockOptionMember_726DEF05E6A10F85F06EB57764BA4202" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_99D62E1AA694AC7DC6D1B57764BF1675" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_99D62E1AA694AC7DC6D1B57764BF1675" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_9EFB0F9234066FE84788B57764BFD8C2" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_9EFB0F9234066FE84788B57764BFD8C2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_F6D9F85C118CEFB1DE30B57764BF0780" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_F6D9F85C118CEFB1DE30B57764BF0780" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_96FEC44DB4421CD365C4B57764C0B3AB" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_96FEC44DB4421CD365C4B57764C0B3AB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_84CAAF06044F1CCBB995B57764C0F14F" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_84CAAF06044F1CCBB995B57764C0F14F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_3DA48EE4B15711670F55B57764C1C1D4" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_3DA48EE4B15711670F55B57764C1C1D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_F68928B4762715B40DB4B57764C16617" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_F68928B4762715B40DB4B57764C16617" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3CC98CE26AB0E355A580B57764C1C5C5" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_3CC98CE26AB0E355A580B57764C1C5C5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_8A97E1C6F69586610D4FB57764C10CE3" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_8A97E1C6F69586610D4FB57764C10CE3" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CashAwardsGrantedDuringPeriodTargetValue" xlink:label="loc_ipg_CashAwardsGrantedDuringPeriodTargetValue_2671F93FE2BBC6CD4B0AB57764C198EA" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_ipg_CashAwardsGrantedDuringPeriodTargetValue_2671F93FE2BBC6CD4B0AB57764C198EA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_1CCE85A894647E5C8A69B57764C235C6" xlink:type="locator" />
    <definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_1CCE85A894647E5C8A69B57764C235C6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_1A9F957688B5823C7F9DB57764C2FEB3" xlink:type="locator" />
    <definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_1A9F957688B5823C7F9DB57764C2FEB3" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_IncentiveCompensationExpenseNonShareBased" xlink:label="loc_ipg_IncentiveCompensationExpenseNonShareBased_69CF5EC1BBAAA0D40FD0B57764C75220" xlink:type="locator" />
    <definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_B155AD03E28161C4DB1DB57764BF0B29" xlink:to="loc_ipg_IncentiveCompensationExpenseNonShareBased_69CF5EC1BBAAA0D40FD0B57764C75220" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/Notes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/OperationsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_E73DD1687AC8252DDF81AF1B03417E39" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_E73DD1687AC8252DDF81AF1B03417E39" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_C7A098596C59F3D0A6ADAF1B0341CB19" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_E73DD1687AC8252DDF81AF1B03417E39" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_C7A098596C59F3D0A6ADAF1B0341CB19" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_8F546C3CE2A797709629AF1B03411A68_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_C7A098596C59F3D0A6ADAF1B0341CB19" xlink:to="loc_us-gaap_SegmentDomain_8F546C3CE2A797709629AF1B03411A68_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_8F546C3CE2A797709629AF1B03411A68" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_C7A098596C59F3D0A6ADAF1B0341CB19" xlink:to="loc_us-gaap_SegmentDomain_8F546C3CE2A797709629AF1B03411A68" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_D97EDF8DBC8DE1321AF1AF1B0345FF5F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_8F546C3CE2A797709629AF1B03411A68" xlink:to="loc_us-gaap_OperatingSegmentsMember_D97EDF8DBC8DE1321AF1AF1B0345FF5F" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ReportableSegmentsTwoMember" xlink:label="loc_ipg_ReportableSegmentsTwoMember_6CDE3F3FB9F63C8B2C37AF1B03459AE6" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_8F546C3CE2A797709629AF1B03411A68" xlink:to="loc_ipg_ReportableSegmentsTwoMember_6CDE3F3FB9F63C8B2C37AF1B03459AE6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CorporateAndOtherMember" xlink:label="loc_us-gaap_CorporateAndOtherMember_AF30E5B2970A347EB1D5AF1B034553FD" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_8F546C3CE2A797709629AF1B03411A68" xlink:to="loc_us-gaap_CorporateAndOtherMember_AF30E5B2970A347EB1D5AF1B034553FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_83BA313F859E93690A28AF1B0345D8B9" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_Revenues_83BA313F859E93690A28AF1B0345D8B9" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_SegmentOperatingIncomeLoss" xlink:label="loc_ipg_SegmentOperatingIncomeLoss_741FEDF5FBAE275138D2AF1B03450232" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_ipg_SegmentOperatingIncomeLoss_741FEDF5FBAE275138D2AF1B03450232" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_E002B2ECB72211B407D5AF1B034515EE" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_RestructuringCharges_E002B2ECB72211B407D5AF1B034515EE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_2F74F4717CE1C514928CAF1B0345CC15" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_InterestExpense_2F74F4717CE1C514928CAF1B0345CC15" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_A7835C2A3406248AB4F7AF1B0345AB1F" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_InvestmentIncomeInterest_A7835C2A3406248AB4F7AF1B0345AB1F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_143CBFC38B4FE22C0744AF1B03456583" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_143CBFC38B4FE22C0744AF1B03456583" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_06C2417177DF3433A058AF1B0345E563" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_06C2417177DF3433A058AF1B0345E563" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_C64DBA89BD6143AAA365AF1B0345E490" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_DepreciationAndAmortization_C64DBA89BD6143AAA365AF1B0345E490" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_707A2937053ECAD0B453AF1B0345FE97" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_707A2937053ECAD0B453AF1B0345FE97" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_D9D4DC531436F0A17FD3AF1B03451821" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1D5D9101FC3785BCD387AF1B03457868" xlink:to="loc_us-gaap_Assets_D9D4DC531436F0A17FD3AF1B03451821" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/OtherExpenseIncomeNetDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_245FF4688DDD2F76B06EB5026D5FC74C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_813DA0974E8511BB2A72B5026D5FB1E7" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_245FF4688DDD2F76B06EB5026D5FC74C" xlink:to="loc_us-gaap_StatementTable_813DA0974E8511BB2A72B5026D5FB1E7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_40AC5A70DA02EF4F26ACB5026D5F3ABF" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_813DA0974E8511BB2A72B5026D5FB1E7" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_40AC5A70DA02EF4F26ACB5026D5F3ABF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_EE2D912C29BDAD4FDAC9B5026D5F0448_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_40AC5A70DA02EF4F26ACB5026D5F3ABF" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_EE2D912C29BDAD4FDAC9B5026D5F0448_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_EE2D912C29BDAD4FDAC9B5026D5F0448" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_40AC5A70DA02EF4F26ACB5026D5F3ABF" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_EE2D912C29BDAD4FDAC9B5026D5F0448" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt6.25NoteMember" xlink:label="loc_ipg_UnsecuredDebt6.25NoteMember_617A444A1DF4A2EAF23DB5026D5FAA0B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_EE2D912C29BDAD4FDAC9B5026D5F0448" xlink:to="loc_ipg_UnsecuredDebt6.25NoteMember_617A444A1DF4A2EAF23DB5026D5FAA0B" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt10.0NoteMember" xlink:label="loc_ipg_UnsecuredDebt10.0NoteMember_DF64F9AD22400976457DB5026D5F19D3" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_EE2D912C29BDAD4FDAC9B5026D5F0448" xlink:to="loc_ipg_UnsecuredDebt10.0NoteMember_DF64F9AD22400976457DB5026D5F19D3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_95280E3F304FBDF6A09BB5026D5FA984" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_245FF4688DDD2F76B06EB5026D5FC74C" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_95280E3F304FBDF6A09BB5026D5FA984" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GainLossOnSaleOfInvestments" xlink:label="loc_us-gaap_GainLossOnSaleOfInvestments_C80196B17C8CFF8922CFB5026D5FA066" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_245FF4688DDD2F76B06EB5026D5FC74C" xlink:to="loc_us-gaap_GainLossOnSaleOfInvestments_C80196B17C8CFF8922CFB5026D5FA066" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_VendorDiscountsAndCreditAdjustments" xlink:label="loc_ipg_VendorDiscountsAndCreditAdjustments_453034BD7EE0165A51B4B5026D5FEEB9" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_245FF4688DDD2F76B06EB5026D5FC74C" xlink:to="loc_ipg_VendorDiscountsAndCreditAdjustments_453034BD7EE0165A51B4B5026D5FEEB9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherNonoperatingExpense" xlink:label="loc_us-gaap_OtherNonoperatingExpense_F1B3788C13E1F25A093DB5026D5F14B8" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_245FF4688DDD2F76B06EB5026D5FC74C" xlink:to="loc_us-gaap_OtherNonoperatingExpense_F1B3788C13E1F25A093DB5026D5F14B8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_EF2E64FF394CA7FFD968B5026D5FCCED" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_245FF4688DDD2F76B06EB5026D5FC74C" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_EF2E64FF394CA7FFD968B5026D5FCCED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_0B1CB6A431880678D5A2B5026D5FF775" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_245FF4688DDD2F76B06EB5026D5FC74C" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_0B1CB6A431880678D5A2B5026D5FF775" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/OtherIntangibleAssetsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8B7B3D68650BA690D917A3617A4F4EE7" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_07724429A2328DA50335A3617A4F1BCE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8B7B3D68650BA690D917A3617A4F4EE7" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_07724429A2328DA50335A3617A4F1BCE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_F6CAE7D2053AA4A4656AA3617A4FBDE6" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_07724429A2328DA50335A3617A4F1BCE" xlink:to="loc_us-gaap_RangeAxis_F6CAE7D2053AA4A4656AA3617A4FBDE6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_C199D33445FDA5FBFA18A3617A4F9057_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_F6CAE7D2053AA4A4656AA3617A4FBDE6" xlink:to="loc_us-gaap_RangeMember_C199D33445FDA5FBFA18A3617A4F9057_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_C199D33445FDA5FBFA18A3617A4F9057" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_F6CAE7D2053AA4A4656AA3617A4FBDE6" xlink:to="loc_us-gaap_RangeMember_C199D33445FDA5FBFA18A3617A4F9057" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_0A02CA9A0C43FA8BCE80A3617A4FFB88" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_C199D33445FDA5FBFA18A3617A4F9057" xlink:to="loc_us-gaap_MinimumMember_0A02CA9A0C43FA8BCE80A3617A4FFB88" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_F5BC799098B7E2FAD532A3617A4FF3C3" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_C199D33445FDA5FBFA18A3617A4F9057" xlink:to="loc_us-gaap_MaximumMember_F5BC799098B7E2FAD532A3617A4FF3C3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B601EB873EE929CB38C2A3617A4FFABE" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_07724429A2328DA50335A3617A4F1BCE" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B601EB873EE929CB38C2A3617A4FFABE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_176368F02DCEE1741F1FA3617A4F0055_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B601EB873EE929CB38C2A3617A4FFABE" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_176368F02DCEE1741F1FA3617A4F0055_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_176368F02DCEE1741F1FA3617A4F0055" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B601EB873EE929CB38C2A3617A4FFABE" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_176368F02DCEE1741F1FA3617A4F0055" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CustomerListsMember" xlink:label="loc_us-gaap_CustomerListsMember_CE8E9C2A445C9B262632A3617A4F52A4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_176368F02DCEE1741F1FA3617A4F0055" xlink:to="loc_us-gaap_CustomerListsMember_CE8E9C2A445C9B262632A3617A4F52A4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="loc_us-gaap_TradeNamesMember_3F5CF992517BC2D167BEA3617A4FCA31" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_176368F02DCEE1741F1FA3617A4F0055" xlink:to="loc_us-gaap_TradeNamesMember_3F5CF992517BC2D167BEA3617A4FCA31" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherIntangibleAssetsMember" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_EC320D561F005C295E01A3617A4F67EF" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_176368F02DCEE1741F1FA3617A4F0055" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_EC320D561F005C295E01A3617A4F67EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_D02AA2DAE63958B8DCA8A3617A4FB78E" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8B7B3D68650BA690D917A3617A4F4EE7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_D02AA2DAE63958B8DCA8A3617A4FB78E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_482B631F74BD3E4D76F5A3617A4FA4BC" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8B7B3D68650BA690D917A3617A4F4EE7" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_482B631F74BD3E4D76F5A3617A4FA4BC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_4F30980DCDC7BE6B412DA3617A4F2AC2" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8B7B3D68650BA690D917A3617A4F4EE7" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_4F30980DCDC7BE6B412DA3617A4F2AC2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_9381AA2F04F9B7F7BC11A3617A55C2CA" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8B7B3D68650BA690D917A3617A4F4EE7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_9381AA2F04F9B7F7BC11A3617A55C2CA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_A5D88A94EE3953F59FA3A3617A5532CA" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8B7B3D68650BA690D917A3617A4F4EE7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_A5D88A94EE3953F59FA3A3617A5532CA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_34BC78DC6C9CD4122130A3617A557FE5" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_8B7B3D68650BA690D917A3617A4F4EE7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_34BC78DC6C9CD4122130A3617A557FE5" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/Parenthetical" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/PensionAndPostretirementBenefitObligationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_DEB8D77F8B1AC71972BEA27D06538B9C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_C4897ACA5A168EDFBD89A27D0651A932" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_DEB8D77F8B1AC71972BEA27D06538B9C" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_C4897ACA5A168EDFBD89A27D0651A932" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_7B1618DF4F8B3C210658A27D0652EE11" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_C4897ACA5A168EDFBD89A27D0651A932" xlink:to="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_7B1618DF4F8B3C210658A27D0652EE11" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="loc_us-gaap_DefinedBenefitPlansDomain_8FFB7A14D54C6346F8CEA27D06521FCD_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_7B1618DF4F8B3C210658A27D0652EE11" xlink:to="loc_us-gaap_DefinedBenefitPlansDomain_8FFB7A14D54C6346F8CEA27D06521FCD_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="loc_us-gaap_DefinedBenefitPlansDomain_8FFB7A14D54C6346F8CEA27D06521FCD" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_7B1618DF4F8B3C210658A27D0652EE11" xlink:to="loc_us-gaap_DefinedBenefitPlansDomain_8FFB7A14D54C6346F8CEA27D06521FCD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember" xlink:label="loc_us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember_A797A8F6B8978E4F6518A27D06524BBE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_8FFB7A14D54C6346F8CEA27D06521FCD" xlink:to="loc_us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember_A797A8F6B8978E4F6518A27D06524BBE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignPensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_ForeignPensionPlansDefinedBenefitMember_1ECA7346D35C4285DDEFA27D0652F9D9" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_8FFB7A14D54C6346F8CEA27D06521FCD" xlink:to="loc_us-gaap_ForeignPensionPlansDefinedBenefitMember_1ECA7346D35C4285DDEFA27D0652F9D9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember" xlink:label="loc_us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember_3464BD9B2B4424494EB3A27D0653208A" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_8FFB7A14D54C6346F8CEA27D06521FCD" xlink:to="loc_us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember_3464BD9B2B4424494EB3A27D0653208A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_DEB8D77F8B1AC71972BEA27D06538B9C" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_C463DE3C4442B6ADB695A27D06546A01" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_C463DE3C4442B6ADB695A27D06546A01" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_08C1A71F1A1D1C77F81BA27D06542543" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_08C1A71F1A1D1C77F81BA27D06542543" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_A3FE28F43C0B0756A874A27D06542B1E" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_A3FE28F43C0B0756A874A27D06542B1E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitsPaid_BFC962EEE7C4420FF8BEA27D0655D09B" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitsPaid_BFC962EEE7C4420FF8BEA27D0655D09B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByPlanParticipants" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByPlanParticipants_56FE3B0B8857C6D89E37A27D06555FCB" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByPlanParticipants_56FE3B0B8857C6D89E37A27D06555FCB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_B87554285B8D1D0F762EA27D06552EA9" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_B87554285B8D1D0F762EA27D06552EA9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanCurtailments" xlink:label="loc_us-gaap_DefinedBenefitPlanCurtailments_EAEDECAAF1EEAB401928A27D065568BB" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:to="loc_us-gaap_DefinedBenefitPlanCurtailments_EAEDECAAF1EEAB401928A27D065568BB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation_76923A863BFD5D6BF63FA27D0655CC70" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:to="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesBenefitObligation_76923A863BFD5D6BF63FA27D0655CC70" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease_5E4564B55103F4A4A9BEA27D0655E575" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_A451FCF8E8BEC8855113A27D06531E33" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationPeriodIncreaseDecrease_5E4564B55103F4A4A9BEA27D0655E575" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_24006F40E9D542FFE486A27D065675FD" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_DEB8D77F8B1AC71972BEA27D06538B9C" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_24006F40E9D542FFE486A27D065675FD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_15A3AB7960D61FFB2EDEA27D0656CF12" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_24006F40E9D542FFE486A27D065675FD" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_15A3AB7960D61FFB2EDEA27D0656CF12" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_A8AEAC11732A284A51E6A27D06563D9F" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_24006F40E9D542FFE486A27D065675FD" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_A8AEAC11732A284A51E6A27D06563D9F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_90B5F6EB524CA03D9624A27D06560B4D" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_24006F40E9D542FFE486A27D065675FD" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_90B5F6EB524CA03D9624A27D06560B4D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_C8CFFE9B07E59B6DFF1AA27D0657D351" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_24006F40E9D542FFE486A27D065675FD" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_C8CFFE9B07E59B6DFF1AA27D0657D351" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets_5A5EB2D6CD35B3459DBBA27D0657F19C" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_24006F40E9D542FFE486A27D065675FD" xlink:to="loc_us-gaap_DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets_5A5EB2D6CD35B3459DBBA27D0657F19C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_CF8ABC6896B36A7A20D1A27D0658AF8D" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_DEB8D77F8B1AC71972BEA27D06538B9C" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_CF8ABC6896B36A7A20D1A27D0658AF8D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EB4111831428F670EDB3A27D0658F118" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_DEB8D77F8B1AC71972BEA27D06538B9C" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EB4111831428F670EDB3A27D0658F118" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_11A8284794CE7B0471F8A27D06584B34" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EB4111831428F670EDB3A27D0658F118" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent_11A8284794CE7B0471F8A27D06584B34" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_E35ED1D72EBD1640F977A27D0659AB0C" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EB4111831428F670EDB3A27D0658F118" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_E35ED1D72EBD1640F977A27D0659AB0C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_71338319CA8572978E67A27D065A433D" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EB4111831428F670EDB3A27D0658F118" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_71338319CA8572978E67A27D065A433D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_D4BE4B23F20ECEF0FD9BA27D065A9B2A" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EB4111831428F670EDB3A27D0658F118" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet_D4BE4B23F20ECEF0FD9BA27D065A9B2A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_1058EE391156DE26CC46A27D065A36BC" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheetAbstract_EB4111831428F670EDB3A27D0658F118" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_1058EE391156DE26CC46A27D065A36BC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_FE56DA04C4BD4D7BCA3AA27D065BD8B1" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_DEB8D77F8B1AC71972BEA27D06538B9C" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_FE56DA04C4BD4D7BCA3AA27D065BD8B1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_932C78D9327FB7B759E6A27D065B2B69" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_FE56DA04C4BD4D7BCA3AA27D065BD8B1" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_932C78D9327FB7B759E6A27D065B2B69" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_892E1BFC847A2E0F5BD3A27D065B6F3D" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_FE56DA04C4BD4D7BCA3AA27D065BD8B1" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_892E1BFC847A2E0F5BD3A27D065B6F3D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsBeforeTax_E3E3256E625F3B7160CAA27D065BFECD" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_FE56DA04C4BD4D7BCA3AA27D065BD8B1" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetTransitionAssetsObligationsBeforeTax_E3E3256E625F3B7160CAA27D065BFECD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_8D13BFE7FB5709D37ADDA27D065B5808" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTaxAbstract_FE56DA04C4BD4D7BCA3AA27D065BD8B1" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_8D13BFE7FB5709D37ADDA27D065B5808" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear_D47A3BD46A2D3C8B75FBA27D065CD14B" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_DEB8D77F8B1AC71972BEA27D06538B9C" xlink:to="loc_us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear_D47A3BD46A2D3C8B75FBA27D065CD14B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_51B050E4B12D22DC2B84A27D065CC46A" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_DEB8D77F8B1AC71972BEA27D06538B9C" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_51B050E4B12D22DC2B84A27D065CC46A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation_CBB9A027E39AA7EABAFDA27D065C3C49" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_51B050E4B12D22DC2B84A27D065CC46A" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation_CBB9A027E39AA7EABAFDA27D065C3C49" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_F63431574C5ADA18C17EA27D065D4782" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_51B050E4B12D22DC2B84A27D065CC46A" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_F63431574C5ADA18C17EA27D065D4782" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_7EDB121643DD7E7EE724A27D065E5B47" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAbstract_51B050E4B12D22DC2B84A27D065CC46A" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_7EDB121643DD7E7EE724A27D065E5B47" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/PensionCashFlowsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_BA33D68D81A1EC61E581A27D068B7446" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_C940842A6C1EA8FC6814A27D06893F57" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_BA33D68D81A1EC61E581A27D068B7446" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_C940842A6C1EA8FC6814A27D06893F57" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis" xlink:label="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_370390768B44F3BC1779A27D068A60DF" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_C940842A6C1EA8FC6814A27D06893F57" xlink:to="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_370390768B44F3BC1779A27D068A60DF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="loc_us-gaap_DefinedBenefitPlansDomain_B7A5D5DFB291BBF8303EA27D068A16D1_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_370390768B44F3BC1779A27D068A60DF" xlink:to="loc_us-gaap_DefinedBenefitPlansDomain_B7A5D5DFB291BBF8303EA27D068A16D1_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansDomain" xlink:label="loc_us-gaap_DefinedBenefitPlansDomain_B7A5D5DFB291BBF8303EA27D068A16D1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis_370390768B44F3BC1779A27D068A60DF" xlink:to="loc_us-gaap_DefinedBenefitPlansDomain_B7A5D5DFB291BBF8303EA27D068A16D1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember" xlink:label="loc_us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember_9D3FC6F4B441996A5B02A27D068A0276" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_B7A5D5DFB291BBF8303EA27D068A16D1" xlink:to="loc_us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember_9D3FC6F4B441996A5B02A27D068A0276" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignPensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_ForeignPensionPlansDefinedBenefitMember_89E3A5487F54105B1469A27D068A5B36" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_B7A5D5DFB291BBF8303EA27D068A16D1" xlink:to="loc_us-gaap_ForeignPensionPlansDefinedBenefitMember_89E3A5487F54105B1469A27D068A5B36" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember" xlink:label="loc_us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember_2B5FAB96B970A6E9C533A27D068B7239" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansDomain_B7A5D5DFB291BBF8303EA27D068A16D1" xlink:to="loc_us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember_2B5FAB96B970A6E9C533A27D068B7239" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_A4B8E170D45299FF2A2DA27D068B0995" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_BA33D68D81A1EC61E581A27D068B7446" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_A4B8E170D45299FF2A2DA27D068B0995" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear_00A16E4DE3ED8F562D8CA27D068BEDEF" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_BA33D68D81A1EC61E581A27D068B7446" xlink:to="loc_us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear_00A16E4DE3ED8F562D8CA27D068BEDEF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_419C651D148FEDED3E7CA27D068B3A55" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_BA33D68D81A1EC61E581A27D068B7446" xlink:to="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_419C651D148FEDED3E7CA27D068B3A55" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_8E7ADF8D54B7825E066AA27D068B4B7F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_419C651D148FEDED3E7CA27D068B3A55" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_8E7ADF8D54B7825E066AA27D068B4B7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_384E65BEB9717E4C038AA27D068C2088" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_419C651D148FEDED3E7CA27D068B3A55" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_384E65BEB9717E4C038AA27D068C2088" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_F5C7A6EFD9D5C9DC22D4A27D068C4614" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_419C651D148FEDED3E7CA27D068B3A55" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_F5C7A6EFD9D5C9DC22D4A27D068C4614" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_FA8DEBFCBB9F27E8C385A27D068CADA9" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_419C651D148FEDED3E7CA27D068B3A55" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_FA8DEBFCBB9F27E8C385A27D068CADA9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_171E29C72F2BC4C49FB0A27D068D5371" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_419C651D148FEDED3E7CA27D068B3A55" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_171E29C72F2BC4C49FB0A27D068D5371" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_CF018623E074822ED8DBA27D068D0BE6" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanEstimatedFutureBenefitPaymentsAbstract_419C651D148FEDED3E7CA27D068B3A55" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_CF018623E074822ED8DBA27D068D0BE6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract" xlink:label="loc_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_A266DF902527F72C8413A27D068EA474" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_BA33D68D81A1EC61E581A27D068B7446" xlink:to="loc_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_A266DF902527F72C8413A27D068EA474" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsNextTwelveMonths" xlink:label="loc_us-gaap_PrescriptionDrugSubsidyReceiptsNextTwelveMonths_A7348825244B1A5D9CC6A27D068EF00E" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_A266DF902527F72C8413A27D068EA474" xlink:to="loc_us-gaap_PrescriptionDrugSubsidyReceiptsNextTwelveMonths_A7348825244B1A5D9CC6A27D068EF00E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsYearTwo1" xlink:label="loc_us-gaap_PrescriptionDrugSubsidyReceiptsYearTwo1_0A291E36B3132B28DDA0A27D068EAE42" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_A266DF902527F72C8413A27D068EA474" xlink:to="loc_us-gaap_PrescriptionDrugSubsidyReceiptsYearTwo1_0A291E36B3132B28DDA0A27D068EAE42" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsYearThree1" xlink:label="loc_us-gaap_PrescriptionDrugSubsidyReceiptsYearThree1_2868B21921DADB9FAD2AA27D068ED547" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_A266DF902527F72C8413A27D068EA474" xlink:to="loc_us-gaap_PrescriptionDrugSubsidyReceiptsYearThree1_2868B21921DADB9FAD2AA27D068ED547" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsYearFour1" xlink:label="loc_us-gaap_PrescriptionDrugSubsidyReceiptsYearFour1_3F3BDD1B3D159D827558A27D068FBC16" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_A266DF902527F72C8413A27D068EA474" xlink:to="loc_us-gaap_PrescriptionDrugSubsidyReceiptsYearFour1_3F3BDD1B3D159D827558A27D068FBC16" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsYearFive1" xlink:label="loc_us-gaap_PrescriptionDrugSubsidyReceiptsYearFive1_10630C989E9177338DFDA27D068FB163" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_A266DF902527F72C8413A27D068EA474" xlink:to="loc_us-gaap_PrescriptionDrugSubsidyReceiptsYearFive1_10630C989E9177338DFDA27D068FB163" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PrescriptionDrugSubsidyReceiptsAfterYearFive" xlink:label="loc_us-gaap_PrescriptionDrugSubsidyReceiptsAfterYearFive_212F438E328C22833D04A27D068F551D" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisclosureOfExpectedGrossPrescriptionDrugSubsidyReceiptsAbstract_A266DF902527F72C8413A27D068EA474" xlink:to="loc_us-gaap_PrescriptionDrugSubsidyReceiptsAfterYearFive_212F438E328C22833D04A27D068F551D" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/PlanInformationDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_0A9CD05677954AAA3BA0A928D851C1DB" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:to="loc_us-gaap_StatementTable_0A9CD05677954AAA3BA0A928D851C1DB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_686FD7974E9B8607C843A928D851E974" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_0A9CD05677954AAA3BA0A928D851C1DB" xlink:to="loc_us-gaap_AwardTypeAxis_686FD7974E9B8607C843A928D851E974" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5A4C96F426F18A5FCC2CA928D851A57A_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_686FD7974E9B8607C843A928D851E974" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5A4C96F426F18A5FCC2CA928D851A57A_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5A4C96F426F18A5FCC2CA928D851A57A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_686FD7974E9B8607C843A928D851E974" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5A4C96F426F18A5FCC2CA928D851A57A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_5F0686E1716E27769D9CA928D851540F" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_0A9CD05677954AAA3BA0A928D851C1DB" xlink:to="loc_us-gaap_RangeAxis_5F0686E1716E27769D9CA928D851540F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_4D6A996F61A7B63A8351A928D85134DD_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_5F0686E1716E27769D9CA928D851540F" xlink:to="loc_us-gaap_RangeMember_4D6A996F61A7B63A8351A928D85134DD_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_4D6A996F61A7B63A8351A928D85134DD" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_5F0686E1716E27769D9CA928D851540F" xlink:to="loc_us-gaap_RangeMember_4D6A996F61A7B63A8351A928D85134DD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_6C8A5CD6ECC23F002C36A928D851BE75" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_4D6A996F61A7B63A8351A928D85134DD" xlink:to="loc_us-gaap_MinimumMember_6C8A5CD6ECC23F002C36A928D851BE75" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_16F196931ACD7512EBDCA928D8517885" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_4D6A996F61A7B63A8351A928D85134DD" xlink:to="loc_us-gaap_MaximumMember_16F196931ACD7512EBDCA928D8517885" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_IncentiveCompensationPlanInitiationYear" xlink:label="loc_ipg_IncentiveCompensationPlanInitiationYear_E0BC094E6844D92057C7A928D851A37F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:to="loc_ipg_IncentiveCompensationPlanInitiationYear_E0BC094E6844D92057C7A928D851A37F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_8F96AF056040107A165DA928D851ABF9" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_8F96AF056040107A165DA928D851ABF9" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAwardValuePerEmployee" xlink:label="loc_ipg_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAwardValuePerEmployee_57D6FF48961ABF2F0FE3A928D8510D47" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:to="loc_ipg_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumAwardValuePerEmployee_57D6FF48961ABF2F0FE3A928D8510D47" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfAward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfAward_924AFD6404B8B9903237A928D851FE74" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfAward_924AFD6404B8B9903237A928D851FE74" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CashAwardbyCompensationArrangementMaximumAwardValuePerEmployee" xlink:label="loc_ipg_CashAwardbyCompensationArrangementMaximumAwardValuePerEmployee_CD1F1032B4FED012235BA928D8528252" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:to="loc_ipg_CashAwardbyCompensationArrangementMaximumAwardValuePerEmployee_CD1F1032B4FED012235BA928D8528252" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_Stockoptionsexercisableperiod" xlink:label="loc_ipg_Stockoptionsexercisableperiod_994C80EFC4F15FDD489CA928D857FA3B" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:to="loc_ipg_Stockoptionsexercisableperiod_994C80EFC4F15FDD489CA928D857FA3B" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_StockOptionExpirationPeriodInYears" xlink:label="loc_ipg_StockOptionExpirationPeriodInYears_98EB1540FFF450BE1868A928D857DCFF" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:to="loc_ipg_StockOptionExpirationPeriodInYears_98EB1540FFF450BE1868A928D857DCFF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_9D87AF1DA8816B35FF99A928D8571204" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_B7DCC988D182751167C9A928D851126C" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_9D87AF1DA8816B35FF99A928D8571204" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/ProvisionForIncomeTaxesDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/RecentAccountingStandardsNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ReconciliationOfEffectiveIncomeTaxRateDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowanceLineItems" xlink:label="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowanceTable" xlink:label="loc_us-gaap_ValuationAllowanceTable_9B86FC99AC0197EC7C61B3D9270D379A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_ValuationAllowanceTable_9B86FC99AC0197EC7C61B3D9270D379A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_F0B480317D63E8A4BA3FB3D9270D3500" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_9B86FC99AC0197EC7C61B3D9270D379A" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_F0B480317D63E8A4BA3FB3D9270D3500" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_4AA787368044AD48C666B3D9270DF961_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_F0B480317D63E8A4BA3FB3D9270D3500" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_4AA787368044AD48C666B3D9270DF961_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_4AA787368044AD48C666B3D9270DF961" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_F0B480317D63E8A4BA3FB3D9270D3500" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_4AA787368044AD48C666B3D9270DF961" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_E3BDD954B279D1610DB6B3D9270DB582" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_4AA787368044AD48C666B3D9270DF961" xlink:to="loc_us-gaap_AsiaPacificMember_E3BDD954B279D1610DB6B3D9270DB582" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ContinentalEuropeMember" xlink:label="loc_ipg_ContinentalEuropeMember_44FDE9812F40AEB86D26B3D9270DF217" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_4AA787368044AD48C666B3D9270DF961" xlink:to="loc_ipg_ContinentalEuropeMember_44FDE9812F40AEB86D26B3D9270DF217" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_TaxContingencyfortheyears20072010Member" xlink:label="loc_ipg_TaxContingencyfortheyears20072010Member_F3721AF31FE81888174DB3D9270D0A7C" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_4AA787368044AD48C666B3D9270DF961" xlink:to="loc_ipg_TaxContingencyfortheyears20072010Member_F3721AF31FE81888174DB3D9270D0A7C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_E533DEE9D49A558269F9B3D9270DA929" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_E533DEE9D49A558269F9B3D9270DA929" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_155097725F28AA6C36FAB3D9270DA73D" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_155097725F28AA6C36FAB3D9270DA73D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_47A5A62856D7D570E1EFB3D9270DE73F" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_47A5A62856D7D570E1EFB3D9270DE73F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_9D4086787D019A742F8FB3D9270D0FF4" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_9D4086787D019A742F8FB3D9270D0FF4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_1D7321027D4199B08C9BB3D927115612" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_1D7321027D4199B08C9BB3D927115612" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationDeductionsOther" xlink:label="loc_us-gaap_IncomeTaxReconciliationDeductionsOther_F71CC5A665C69D380992B3D92711DB79" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_IncomeTaxReconciliationDeductionsOther_F71CC5A665C69D380992B3D92711DB79" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease_F8EF1E16D10C25B4C627B3D92711FFC2" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease_F8EF1E16D10C25B4C627B3D92711FFC2" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_1CE283A151467D7D067FB3D927115251" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_1CE283A151467D7D067FB3D927115251" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_FF83227FD3F3FF5F7953B3D92711DE4B" xlink:type="locator" />
    <definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_FF83227FD3F3FF5F7953B3D92711DE4B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_74EF6F52233BAE9D3C76B3D927115176" xlink:type="locator" />
    <definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_74EF6F52233BAE9D3C76B3D927115176" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ReversalOfValuationAllowance" xlink:label="loc_ipg_ReversalOfValuationAllowance_15D70F22167EB43CAC8FB3D9271115ED" xlink:type="locator" />
    <definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_ipg_ReversalOfValuationAllowance_15D70F22167EB43CAC8FB3D9271115ED" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_Valuationallowanceestablished" xlink:label="loc_ipg_Valuationallowanceestablished_2B6DB5120378C7DB0E19B3D92711235B" xlink:type="locator" />
    <definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_ipg_Valuationallowanceestablished_2B6DB5120378C7DB0E19B3D92711235B" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_AdjustmenttoValuationAllowance" xlink:label="loc_ipg_AdjustmenttoValuationAllowance_13FC27468353B5D84A8FB3D92711D817" xlink:type="locator" />
    <definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_ipg_AdjustmenttoValuationAllowance_13FC27468353B5D84A8FB3D92711D817" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_OneHundredPercentValuationAllowance" xlink:label="loc_ipg_OneHundredPercentValuationAllowance_34414AA1A1FA0FFA051CB3D92711B616" xlink:type="locator" />
    <definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_34168EB4D1D3C8003F5DB3D9270D2605" xlink:to="loc_ipg_OneHundredPercentValuationAllowance_34414AA1A1FA0FFA051CB3D92711B616" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/RedeemableNoncontrollingInterestsDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/RestructuringAndOtherReorganizationRelatedChargesReversalsNetDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_02369F7219D68FDB32D2B3DAB814D182" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8E281A31A315146E9989B3DAB8081831" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_02369F7219D68FDB32D2B3DAB814D182" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8E281A31A315146E9989B3DAB8081831" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_A21CA42E0BA189A4C8A5B3DAB80C83C8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8E281A31A315146E9989B3DAB8081831" xlink:to="loc_us-gaap_PlanNameAxis_A21CA42E0BA189A4C8A5B3DAB80C83C8" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_C380F86A367C4F74EC45B3DAB80C2BE5_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_A21CA42E0BA189A4C8A5B3DAB80C83C8" xlink:to="loc_us-gaap_PlanNameDomain_C380F86A367C4F74EC45B3DAB80C2BE5_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_C380F86A367C4F74EC45B3DAB80C2BE5" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_A21CA42E0BA189A4C8A5B3DAB80C83C8" xlink:to="loc_us-gaap_PlanNameDomain_C380F86A367C4F74EC45B3DAB80C2BE5" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_A2013RestructuringPlanDomain" xlink:label="loc_ipg_A2013RestructuringPlanDomain_718FB1A0A9A10FECE374B3DAB80C2AFE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_C380F86A367C4F74EC45B3DAB80C2BE5" xlink:to="loc_ipg_A2013RestructuringPlanDomain_718FB1A0A9A10FECE374B3DAB80C2AFE" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PriorRestructuringPlanDomain" xlink:label="loc_ipg_PriorRestructuringPlanDomain_0DB8731EBF6349449F64B3DAB80C5A39" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_C380F86A367C4F74EC45B3DAB80C2BE5" xlink:to="loc_ipg_PriorRestructuringPlanDomain_0DB8731EBF6349449F64B3DAB80C5A39" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_3CCDDEC0EBDF384312F7B3DAB80CDC90" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8E281A31A315146E9989B3DAB8081831" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_3CCDDEC0EBDF384312F7B3DAB80CDC90" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_18E2983118610EDC204FB3DAB80C88ED_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3CCDDEC0EBDF384312F7B3DAB80CDC90" xlink:to="loc_us-gaap_SegmentDomain_18E2983118610EDC204FB3DAB80C88ED_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_18E2983118610EDC204FB3DAB80C88ED" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3CCDDEC0EBDF384312F7B3DAB80CDC90" xlink:to="loc_us-gaap_SegmentDomain_18E2983118610EDC204FB3DAB80C88ED" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_36152C038BBFC08D0D77B3DAB80CFD9B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_18E2983118610EDC204FB3DAB80C88ED" xlink:to="loc_us-gaap_OperatingSegmentsMember_36152C038BBFC08D0D77B3DAB80CFD9B" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ReportableSegmentsTwoMember" xlink:label="loc_ipg_ReportableSegmentsTwoMember_0B7AD8F945672DC6A0E9B3DAB80CC14D" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_18E2983118610EDC204FB3DAB80C88ED" xlink:to="loc_ipg_ReportableSegmentsTwoMember_0B7AD8F945672DC6A0E9B3DAB80CC14D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_9897CE045913B8D108D7B3DAB810B10B" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_8E281A31A315146E9989B3DAB8081831" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_9897CE045913B8D108D7B3DAB810B10B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_826AA88AA187BF3984F5B3DAB8101164_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_9897CE045913B8D108D7B3DAB810B10B" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_826AA88AA187BF3984F5B3DAB8101164_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_826AA88AA187BF3984F5B3DAB8101164" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_9897CE045913B8D108D7B3DAB810B10B" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_826AA88AA187BF3984F5B3DAB8101164" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="loc_us-gaap_EmployeeSeveranceMember_6AF7377651E528C83827B3DAB8100281" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_826AA88AA187BF3984F5B3DAB8101164" xlink:to="loc_us-gaap_EmployeeSeveranceMember_6AF7377651E528C83827B3DAB8100281" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ContractTerminationMember" xlink:label="loc_us-gaap_ContractTerminationMember_C5A4352B736A2DCB8E4BB3DAB8102551" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_826AA88AA187BF3984F5B3DAB8101164" xlink:to="loc_us-gaap_ContractTerminationMember_C5A4352B736A2DCB8E4BB3DAB8102551" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_OtherRestructuringMember" xlink:label="loc_us-gaap_OtherRestructuringMember_75BD6B46E522CD7529B9B3DAB81012D3" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_826AA88AA187BF3984F5B3DAB8101164" xlink:to="loc_us-gaap_OtherRestructuringMember_75BD6B46E522CD7529B9B3DAB81012D3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_053F3452A008153E3EF7B3DAB8147565" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_02369F7219D68FDB32D2B3DAB814D182" xlink:to="loc_us-gaap_RestructuringCharges_053F3452A008153E3EF7B3DAB8147565" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PaymentsForRestructuring" xlink:label="loc_us-gaap_PaymentsForRestructuring_0C5D5CDBF935C0F28D9DB3DAB81487AC" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_02369F7219D68FDB32D2B3DAB814D182" xlink:to="loc_us-gaap_PaymentsForRestructuring_0C5D5CDBF935C0F28D9DB3DAB81487AC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringReserveTranslationAdjustment" xlink:label="loc_us-gaap_RestructuringReserveTranslationAdjustment_D8463C26CFA51FDF0996B3DAB81457A3" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_02369F7219D68FDB32D2B3DAB814D182" xlink:to="loc_us-gaap_RestructuringReserveTranslationAdjustment_D8463C26CFA51FDF0996B3DAB81457A3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RestructuringReserve" xlink:label="loc_us-gaap_RestructuringReserve_4628C2F86F40A95AC2EEB3DAB8140D7C" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_02369F7219D68FDB32D2B3DAB814D182" xlink:to="loc_us-gaap_RestructuringReserve_4628C2F86F40A95AC2EEB3DAB8140D7C" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/RestructuringAndOtherReorganizationRelatedChargesReversalsNetNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/RestructuringAndOtherReorganizationRelatedChargesReversalsNetTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ResultsByQuarterUnauditedDetails" xlink:type="extended">
    <loc xlink:href="ipg-20141231.xsd#ipg_QuarterlyInformationTablesLineItems" xlink:label="loc_ipg_QuarterlyInformationTablesLineItems_84D93844ABE23A655851B3DAB31BD9A1" xlink:type="locator" />
    <loc xlink:href="ipg-20141231.xsd#ipg_QuarterlyInformationTablesTable" xlink:label="loc_ipg_QuarterlyInformationTablesTable_68B700A084324820CD8EB3DAB31B9116" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ipg_QuarterlyInformationTablesLineItems_84D93844ABE23A655851B3DAB31BD9A1" xlink:to="loc_ipg_QuarterlyInformationTablesTable_68B700A084324820CD8EB3DAB31B9116" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_2B8D6FD03D69580F9D0AB3DAB31B66EF" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ipg_QuarterlyInformationTablesTable_68B700A084324820CD8EB3DAB31B9116" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_2B8D6FD03D69580F9D0AB3DAB31B66EF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_00BCCAE8635CD4A9DE38B3DAB31B323C_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_2B8D6FD03D69580F9D0AB3DAB31B66EF" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_00BCCAE8635CD4A9DE38B3DAB31B323C_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_00BCCAE8635CD4A9DE38B3DAB31B323C" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_2B8D6FD03D69580F9D0AB3DAB31B66EF" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_00BCCAE8635CD4A9DE38B3DAB31B323C" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_UnsecuredDebt6.25NoteMember" xlink:label="loc_ipg_UnsecuredDebt6.25NoteMember_1D869593EFCE398FCA0BB3DAB31BB81D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_00BCCAE8635CD4A9DE38B3DAB31B323C" xlink:to="loc_ipg_UnsecuredDebt6.25NoteMember_1D869593EFCE398FCA0BB3DAB31BB81D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_8DF6F871AEC1DDCA8C64B3DAB31BCC84" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_QuarterlyInformationTablesLineItems_84D93844ABE23A655851B3DAB31BD9A1" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_8DF6F871AEC1DDCA8C64B3DAB31BCC84" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_C9DDC0D914D10F31AF3FB3DAB31B155A" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_QuarterlyInformationTablesLineItems_84D93844ABE23A655851B3DAB31BD9A1" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_C9DDC0D914D10F31AF3FB3DAB31B155A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_1D23867B78B8F0C59421B3DAB31B0AF1" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_QuarterlyInformationTablesLineItems_84D93844ABE23A655851B3DAB31BD9A1" xlink:to="loc_us-gaap_EarningsPerShareBasic_1D23867B78B8F0C59421B3DAB31B0AF1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_E066718986E6686BE836B3DAB31B326D" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_QuarterlyInformationTablesLineItems_84D93844ABE23A655851B3DAB31BD9A1" xlink:to="loc_us-gaap_EarningsPerShareDiluted_E066718986E6686BE836B3DAB31B326D" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/ResultsByQuarterUnauditedNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ResultsByQuarterUnauditedTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SavingsPlansDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_01F3CF35127EC34BC89EB185674A1348" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_9E87B6D73662F040824AB18567488BD9" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_01F3CF35127EC34BC89EB185674A1348" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_9E87B6D73662F040824AB18567488BD9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="ipg-20141231.xsd#ipg_DefinedContributionPlansAxis" xlink:label="loc_ipg_DefinedContributionPlansAxis_56078959F793611DEF9AB18567483ACC" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_9E87B6D73662F040824AB18567488BD9" xlink:to="loc_ipg_DefinedContributionPlansAxis_56078959F793611DEF9AB18567483ACC" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_DefinedContributionPlanDomain" xlink:label="loc_ipg_DefinedContributionPlanDomain_60BECF014E04E1095B11B18567490519_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ipg_DefinedContributionPlansAxis_56078959F793611DEF9AB18567483ACC" xlink:to="loc_ipg_DefinedContributionPlanDomain_60BECF014E04E1095B11B18567490519_default" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_DefinedContributionPlanDomain" xlink:label="loc_ipg_DefinedContributionPlanDomain_60BECF014E04E1095B11B18567490519" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ipg_DefinedContributionPlansAxis_56078959F793611DEF9AB18567483ACC" xlink:to="loc_ipg_DefinedContributionPlanDomain_60BECF014E04E1095B11B18567490519" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_1526FE2855BB5CF560DEB185674AB2FE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_DefinedContributionPlanDomain_60BECF014E04E1095B11B18567490519" xlink:to="loc_us-gaap_DomesticCountryMember_1526FE2855BB5CF560DEB185674AB2FE" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_DiscretionaryCompanyContributionMember" xlink:label="loc_ipg_DiscretionaryCompanyContributionMember_074DA88AB7512FFB312BB185674AC7B5" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_DefinedContributionPlanDomain_60BECF014E04E1095B11B18567490519" xlink:to="loc_ipg_DiscretionaryCompanyContributionMember_074DA88AB7512FFB312BB185674AC7B5" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_DefinedContributionPlansParticipantForfeituresMember" xlink:label="loc_ipg_DefinedContributionPlansParticipantForfeituresMember_37778564C65B5F3A4F51B185674AC595" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_DefinedContributionPlanDomain_60BECF014E04E1095B11B18567490519" xlink:to="loc_ipg_DefinedContributionPlansParticipantForfeituresMember_37778564C65B5F3A4F51B185674AC595" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_A900D55A6ADBAFEF0CFFB185674A9ECC" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_DefinedContributionPlanDomain_60BECF014E04E1095B11B18567490519" xlink:to="loc_us-gaap_ForeignCountryMember_A900D55A6ADBAFEF0CFFB185674A9ECC" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_F672E0C357E27591EC7DB185674B38E4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_01F3CF35127EC34BC89EB185674A1348" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_F672E0C357E27591EC7DB185674B38E4" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/SegmentInformationMajorGeographicAreaDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_CE1BF43EF41136520F2BAF1B03351FFF" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_0CB3BF1FA74EFEBB9067AF1B0335F86B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_CE1BF43EF41136520F2BAF1B03351FFF" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_0CB3BF1FA74EFEBB9067AF1B0335F86B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_5C3D9D98F1D6B8B78172AF1B0335C4EE" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_0CB3BF1FA74EFEBB9067AF1B0335F86B" xlink:to="loc_us-gaap_StatementGeographicalAxis_5C3D9D98F1D6B8B78172AF1B0335C4EE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_0D90C8D29C622212E8ADAF1B0335EB70_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_5C3D9D98F1D6B8B78172AF1B0335C4EE" xlink:to="loc_us-gaap_SegmentGeographicalDomain_0D90C8D29C622212E8ADAF1B0335EB70_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_0D90C8D29C622212E8ADAF1B0335EB70" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_5C3D9D98F1D6B8B78172AF1B0335C4EE" xlink:to="loc_us-gaap_SegmentGeographicalDomain_0D90C8D29C622212E8ADAF1B0335EB70" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_SegmentDomesticDomain" xlink:label="loc_ipg_SegmentDomesticDomain_00029894382D4D155D02AF1B0335E89F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_0D90C8D29C622212E8ADAF1B0335EB70" xlink:to="loc_ipg_SegmentDomesticDomain_00029894382D4D155D02AF1B0335E89F" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_SegmentInternationalDomain" xlink:label="loc_ipg_SegmentInternationalDomain_56A646085F4EB57CA26EAF1B0335A131" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_0D90C8D29C622212E8ADAF1B0335EB70" xlink:to="loc_ipg_SegmentInternationalDomain_56A646085F4EB57CA26EAF1B0335A131" xlink:type="arc" />
    <loc xlink:href="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd#country_GB" xlink:label="loc_country_GB_05A412505E4551DF8B58AF1B03352D29" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_SegmentInternationalDomain_56A646085F4EB57CA26EAF1B0335A131" xlink:to="loc_country_GB_05A412505E4551DF8B58AF1B03352D29" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EuropeMember" xlink:label="loc_us-gaap_EuropeMember_D20DA23644729A10FB22AF1B03356471" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_SegmentInternationalDomain_56A646085F4EB57CA26EAF1B0335A131" xlink:to="loc_us-gaap_EuropeMember_D20DA23644729A10FB22AF1B03356471" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AsiaPacificMember" xlink:label="loc_us-gaap_AsiaPacificMember_499522DCBED25CF2FC30AF1B03359B7F" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_SegmentInternationalDomain_56A646085F4EB57CA26EAF1B0335A131" xlink:to="loc_us-gaap_AsiaPacificMember_499522DCBED25CF2FC30AF1B03359B7F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LatinAmericaMember" xlink:label="loc_us-gaap_LatinAmericaMember_4BB5562435EE30155B00AF1B0335C74C" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_SegmentInternationalDomain_56A646085F4EB57CA26EAF1B0335A131" xlink:to="loc_us-gaap_LatinAmericaMember_4BB5562435EE30155B00AF1B0335C74C" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_SegmentGeographicalGroupsOfCountriesGroupFiveMember" xlink:label="loc_ipg_SegmentGeographicalGroupsOfCountriesGroupFiveMember_969324CA4C4EBC3697FAAF1B03356AD1" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ipg_SegmentInternationalDomain_56A646085F4EB57CA26EAF1B0335A131" xlink:to="loc_ipg_SegmentGeographicalGroupsOfCountriesGroupFiveMember_969324CA4C4EBC3697FAAF1B03356AD1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_NoncurrentAssets" xlink:label="loc_us-gaap_NoncurrentAssets_F96B7A3E2634D54D1F46AF1B0335E628" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_CE1BF43EF41136520F2BAF1B03351FFF" xlink:to="loc_us-gaap_NoncurrentAssets_F96B7A3E2634D54D1F46AF1B0335E628" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_A216A1DCDDECAF493CCCAF1B0339A6F8" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_CE1BF43EF41136520F2BAF1B03351FFF" xlink:to="loc_us-gaap_Revenues_A216A1DCDDECAF493CCCAF1B0339A6F8" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/SegmentInformationNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SegmentInformationTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/ShareBasedCompensationAwardsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CD5E7FB124EC61681633A339EDBE7449" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6620C4A7FE88C9A53125A339EDBDD08A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CD5E7FB124EC61681633A339EDBE7449" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6620C4A7FE88C9A53125A339EDBDD08A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_3E1E81420746396719E5A339EDBD999D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6620C4A7FE88C9A53125A339EDBDD08A" xlink:to="loc_us-gaap_AwardTypeAxis_3E1E81420746396719E5A339EDBD999D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_3E1E81420746396719E5A339EDBD999D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_3E1E81420746396719E5A339EDBD999D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_StockSettledAwardsMember" xlink:label="loc_ipg_StockSettledAwardsMember_D00857F6F250640140ACA339EDBDE6D0" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07" xlink:to="loc_ipg_StockSettledAwardsMember_D00857F6F250640140ACA339EDBDE6D0" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CashSettledAwardsMember" xlink:label="loc_ipg_CashSettledAwardsMember_D979DB76F9CAC1E2A706A339EDBD6100" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07" xlink:to="loc_ipg_CashSettledAwardsMember_D979DB76F9CAC1E2A706A339EDBD6100" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PerformanceBasedAwardsMember" xlink:label="loc_ipg_PerformanceBasedAwardsMember_B986C267B070242DC925A339EDBDE453" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07" xlink:to="loc_ipg_PerformanceBasedAwardsMember_B986C267B070242DC925A339EDBDE453" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PerformanceBasedCashAwardsSettledInSharesMember" xlink:label="loc_ipg_PerformanceBasedCashAwardsSettledInSharesMember_37D704622DB3DCF6BC16A339EDBD5BEA" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07" xlink:to="loc_ipg_PerformanceBasedCashAwardsSettledInSharesMember_37D704622DB3DCF6BC16A339EDBD5BEA" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PerformanceBasedCashAwardsMember" xlink:label="loc_ipg_PerformanceBasedCashAwardsMember_BBA39A6CD6565CBA0A8EA339EDBD53BB" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07" xlink:to="loc_ipg_PerformanceBasedCashAwardsMember_BBA39A6CD6565CBA0A8EA339EDBD53BB" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_TimeBasedCashAwardsMember" xlink:label="loc_ipg_TimeBasedCashAwardsMember_1E48C776C017882CC5A0A339EDBD8D5A" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9A4A016DEC6735443ED6A339EDBD4A07" xlink:to="loc_ipg_TimeBasedCashAwardsMember_1E48C776C017882CC5A0A339EDBD8D5A" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_Stockbasedawardsexpectedtobesettledincash" xlink:label="loc_ipg_Stockbasedawardsexpectedtobesettledincash_3616A1FF55298D28FD5BA339EDBE1815" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CD5E7FB124EC61681633A339EDBE7449" xlink:to="loc_ipg_Stockbasedawardsexpectedtobesettledincash_3616A1FF55298D28FD5BA339EDBE1815" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_3F4B881E2CF261F1B8A4A339EDBE1A68" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CD5E7FB124EC61681633A339EDBE7449" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_3F4B881E2CF261F1B8A4A339EDBE1A68" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_544E87B3C61DF286D192A339EDBEC555" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CD5E7FB124EC61681633A339EDBE7449" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_544E87B3C61DF286D192A339EDBEC555" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DividendsSharebasedCompensationStock" xlink:label="loc_us-gaap_DividendsSharebasedCompensationStock_84991C1886C0690F0CEAA339EDBE1B99" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CD5E7FB124EC61681633A339EDBE7449" xlink:to="loc_us-gaap_DividendsSharebasedCompensationStock_84991C1886C0690F0CEAA339EDBE1B99" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_DividendsPaidForStockSettledAwards" xlink:label="loc_ipg_DividendsPaidForStockSettledAwards_A5EBAC6D10FBF0873415A339EDBEA7FE" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_CD5E7FB124EC61681633A339EDBE7449" xlink:to="loc_ipg_DividendsPaidForStockSettledAwards_A5EBAC6D10FBF0873415A339EDBEA7FE" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/ShareRepurchaseProgramDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_73BB3136F7144896F4CFA8E4B4125711" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_54B7AE5E8358F6CABEFBA8E4B41273C2" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_73BB3136F7144896F4CFA8E4B4125711" xlink:to="loc_us-gaap_StatementTable_54B7AE5E8358F6CABEFBA8E4B41273C2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_85AA7DA4AFAB57E12BDFA8E4B412695F" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_54B7AE5E8358F6CABEFBA8E4B41273C2" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_85AA7DA4AFAB57E12BDFA8E4B412695F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_0E7B2CBD477BED6D0180A8E4B41206F4_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_85AA7DA4AFAB57E12BDFA8E4B412695F" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_0E7B2CBD477BED6D0180A8E4B41206F4_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_0E7B2CBD477BED6D0180A8E4B41206F4" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_85AA7DA4AFAB57E12BDFA8E4B412695F" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_0E7B2CBD477BED6D0180A8E4B41206F4" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ShareRepurchaseProgramOneMember" xlink:label="loc_ipg_ShareRepurchaseProgramOneMember_AC43738A1A43524ED7F6A8E4B412844D" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_0E7B2CBD477BED6D0180A8E4B41206F4" xlink:to="loc_ipg_ShareRepurchaseProgramOneMember_AC43738A1A43524ED7F6A8E4B412844D" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ShareRepurchaseProgramTwoMember" xlink:label="loc_ipg_ShareRepurchaseProgramTwoMember_5752A095EB27D013009AA8E4B412D9C2" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_0E7B2CBD477BED6D0180A8E4B41206F4" xlink:to="loc_ipg_ShareRepurchaseProgramTwoMember_5752A095EB27D013009AA8E4B412D9C2" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ShareRepurchaseProgramThreeMemberDomain" xlink:label="loc_ipg_ShareRepurchaseProgramThreeMemberDomain_977607BD162CEB58780DA8E4B412EFB1" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_0E7B2CBD477BED6D0180A8E4B41206F4" xlink:to="loc_ipg_ShareRepurchaseProgramThreeMemberDomain_977607BD162CEB58780DA8E4B412EFB1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_F714499C32F03E4860BDA8E4B412A78E" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_73BB3136F7144896F4CFA8E4B4125711" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_F714499C32F03E4860BDA8E4B412A78E" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_StockRepurchaseProgramAuthorizedAmountAfterProgramIncrease" xlink:label="loc_ipg_StockRepurchaseProgramAuthorizedAmountAfterProgramIncrease_D7D42158EEF25F48903DA8E4B412DCF1" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_73BB3136F7144896F4CFA8E4B4125711" xlink:to="loc_ipg_StockRepurchaseProgramAuthorizedAmountAfterProgramIncrease_D7D42158EEF25F48903DA8E4B412DCF1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockSharesAcquired" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_8C95404923582F7E3869A8E4B4127F20" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_73BB3136F7144896F4CFA8E4B4125711" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_8C95404923582F7E3869A8E4B4127F20" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_D41D9AC2F49E5EC8DD59A8E4B4129E70" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_73BB3136F7144896F4CFA8E4B4125711" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_D41D9AC2F49E5EC8DD59A8E4B4129E70" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_0FCAAC4B0DEFA4FA9038A8E4B41297A4" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_73BB3136F7144896F4CFA8E4B4125711" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_0FCAAC4B0DEFA4FA9038A8E4B41297A4" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ShareRepurchaseProgramRemainingAmountforRepurchase" xlink:label="loc_ipg_ShareRepurchaseProgramRemainingAmountforRepurchase_DDAD79C61DCAAB714DA5A8E4B4128A3B" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_73BB3136F7144896F4CFA8E4B4125711" xlink:to="loc_ipg_ShareRepurchaseProgramRemainingAmountforRepurchase_DDAD79C61DCAAB714DA5A8E4B4128A3B" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/StockBasedCompensationExpenseDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6ED11ACE8F154519F0DFB577658BE51D" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_579707B7DD0268905967B5776584C185" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6ED11ACE8F154519F0DFB577658BE51D" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_579707B7DD0268905967B5776584C185" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_C56B8C5073B818AB896AB5776584B19A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_579707B7DD0268905967B5776584C185" xlink:to="loc_us-gaap_AwardTypeAxis_C56B8C5073B818AB896AB5776584B19A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_C56B8C5073B818AB896AB5776584B19A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_C56B8C5073B818AB896AB5776584B19A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_724398873C441192A9A9B57765858E44" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1" xlink:to="loc_us-gaap_EmployeeStockOptionMember_724398873C441192A9A9B57765858E44" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_StockSettledAwardsMember" xlink:label="loc_ipg_StockSettledAwardsMember_06934D39C90427267D76B577658AFFC1" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1" xlink:to="loc_ipg_StockSettledAwardsMember_06934D39C90427267D76B577658AFFC1" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CashSettledAwardsMember" xlink:label="loc_ipg_CashSettledAwardsMember_C3E3E595B9DB1F62D537B577658B319D" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1" xlink:to="loc_ipg_CashSettledAwardsMember_C3E3E595B9DB1F62D537B577658B319D" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_PerformanceBasedAwardsMember" xlink:label="loc_ipg_PerformanceBasedAwardsMember_C7DFC20BF76E08FC8CB9B577658BF699" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1" xlink:to="loc_ipg_PerformanceBasedAwardsMember_C7DFC20BF76E08FC8CB9B577658BF699" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_EmployeeStockMember" xlink:label="loc_us-gaap_EmployeeStockMember_A1537A7E2E6A2B20010DB577658B1FA9" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1" xlink:to="loc_us-gaap_EmployeeStockMember_A1537A7E2E6A2B20010DB577658B1FA9" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_OtherCompensationMember" xlink:label="loc_ipg_OtherCompensationMember_9D7FF8F6B881AB9AEBB0B577658BA7B0" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_51F0CB770824A9EA2188B5776585E1F1" xlink:to="loc_ipg_OtherCompensationMember_9D7FF8F6B881AB9AEBB0B577658BA7B0" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_CC16B858FE9BF0A47611B577658B21C6" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6ED11ACE8F154519F0DFB577658BE51D" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_CC16B858FE9BF0A47611B577658B21C6" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DeferredTaxExpenseFromStockOptionsExercised" xlink:label="loc_us-gaap_DeferredTaxExpenseFromStockOptionsExercised_3801D43ACDB951720F0FB577658DF534" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6ED11ACE8F154519F0DFB577658BE51D" xlink:to="loc_us-gaap_DeferredTaxExpenseFromStockOptionsExercised_3801D43ACDB951720F0FB577658DF534" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_IncentiveCompensationExpenseNonShareBased" xlink:label="loc_ipg_IncentiveCompensationExpenseNonShareBased_BC7D5436A92408F8D275B577658D8512" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6ED11ACE8F154519F0DFB577658BE51D" xlink:to="loc_ipg_IncentiveCompensationExpenseNonShareBased_BC7D5436A92408F8D275B577658D8512" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/StockOptionValuationAssumptionsDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SubsequentEventsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_C96363099E0C49160C95B577600362BC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_9B54BBE143022505EF7EB5775FFBD781" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_C96363099E0C49160C95B577600362BC" xlink:to="loc_us-gaap_SubsequentEventTable_9B54BBE143022505EF7EB5775FFBD781" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_060EE42B33A0699663C0B5776002C432" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_9B54BBE143022505EF7EB5775FFBD781" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_060EE42B33A0699663C0B5776002C432" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_A5828752756386AE1295B57760020A82_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_060EE42B33A0699663C0B5776002C432" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_A5828752756386AE1295B57760020A82_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_A5828752756386AE1295B57760020A82" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_060EE42B33A0699663C0B5776002C432" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_A5828752756386AE1295B57760020A82" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_ShareRepurchaseProgramFourMember" xlink:label="loc_ipg_ShareRepurchaseProgramFourMember_46DEA81739AB0816EE66B57B0DADB4F5" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_A5828752756386AE1295B57760020A82" xlink:to="loc_ipg_ShareRepurchaseProgramFourMember_46DEA81739AB0816EE66B57B0DADB4F5" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DividendsDomain" xlink:label="loc_us-gaap_DividendsDomain_8638C0971B8BFECE533FB580EDD28F09" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_A5828752756386AE1295B57760020A82" xlink:to="loc_us-gaap_DividendsDomain_8638C0971B8BFECE533FB580EDD28F09" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DividendPaidMember" xlink:label="loc_us-gaap_DividendPaidMember_55558EBC48EB24CACC3FB579B2F6F162" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_A5828752756386AE1295B57760020A82" xlink:to="loc_us-gaap_DividendPaidMember_55558EBC48EB24CACC3FB579B2F6F162" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DividendDeclaredMember" xlink:label="loc_us-gaap_DividendDeclaredMember_66BB8C312D842C2E9124B5794CCA52CE" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_A5828752756386AE1295B57760020A82" xlink:to="loc_us-gaap_DividendDeclaredMember_66BB8C312D842C2E9124B5794CCA52CE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_76B222F09E3FAD04B28AB5776003D26E" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_C96363099E0C49160C95B577600362BC" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_76B222F09E3FAD04B28AB5776003D26E" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DividendsPayableAmountPerShare" xlink:label="loc_us-gaap_DividendsPayableAmountPerShare_B5D379A65A324EA47146B57760095C5C" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_C96363099E0C49160C95B577600362BC" xlink:to="loc_us-gaap_DividendsPayableAmountPerShare_B5D379A65A324EA47146B57760095C5C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DividendPayableDateToBePaidDayMonthAndYear" xlink:label="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_0FEEE7B4B2ADDA82058CB577600B8133" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_C96363099E0C49160C95B577600362BC" xlink:to="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_0FEEE7B4B2ADDA82058CB577600B8133" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear" xlink:label="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_51A390B9E3EB6D2A7F64B577600BFAFB" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_C96363099E0C49160C95B577600362BC" xlink:to="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_51A390B9E3EB6D2A7F64B577600BFAFB" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/SubsequentEventsNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SubsequentEventsTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesAccountsPayablePolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesAllowanceForDoubtfulAccountsPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesCashAndCashEquivalentsPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesDerivativesPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_1ACB9B2C309AE369B4D6A825966E4A3F" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_D869604049174ADC5A42A825966D12F8" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1ACB9B2C309AE369B4D6A825966E4A3F" xlink:to="loc_us-gaap_StatementTable_D869604049174ADC5A42A825966D12F8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_640A080E558337D684CAA825966D15CD" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_D869604049174ADC5A42A825966D12F8" xlink:to="loc_us-gaap_RangeAxis_640A080E558337D684CAA825966D15CD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_15D6337CED8CFAC745F4A825966D209B_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_640A080E558337D684CAA825966D15CD" xlink:to="loc_us-gaap_RangeMember_15D6337CED8CFAC745F4A825966D209B_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_15D6337CED8CFAC745F4A825966D209B" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_640A080E558337D684CAA825966D15CD" xlink:to="loc_us-gaap_RangeMember_15D6337CED8CFAC745F4A825966D209B" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_7886C2383851F8FDBBBEA825966D2445" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_15D6337CED8CFAC745F4A825966D209B" xlink:to="loc_us-gaap_MinimumMember_7886C2383851F8FDBBBEA825966D2445" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_951FAA72B889105FC280A825966E0163" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_15D6337CED8CFAC745F4A825966D209B" xlink:to="loc_us-gaap_MaximumMember_951FAA72B889105FC280A825966E0163" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_6CC15675E0939D538892A825966E567A" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1ACB9B2C309AE369B4D6A825966E4A3F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_6CC15675E0939D538892A825966E567A" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_BuildingsUsefulLife" xlink:label="loc_ipg_BuildingsUsefulLife_A1CEB395C4BEBEA0E7C6A825966E7391" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1ACB9B2C309AE369B4D6A825966E4A3F" xlink:to="loc_ipg_BuildingsUsefulLife_A1CEB395C4BEBEA0E7C6A825966E7391" xlink:type="arc" />
    <loc xlink:href="ipg-20141231.xsd#ipg_CapitalizedInternalUseSoftwareUsefulLife" xlink:label="loc_ipg_CapitalizedInternalUseSoftwareUsefulLife_C85FF1B7B11B5245A313A825966EF4D4" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1ACB9B2C309AE369B4D6A825966E4A3F" xlink:to="loc_ipg_CapitalizedInternalUseSoftwareUsefulLife_C85FF1B7B11B5245A313A825966EF4D4" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_InternalUseSoftwarePolicy" xlink:label="loc_us-gaap_InternalUseSoftwarePolicy_331C0734B875F0B65D80A825966EC4A9" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1ACB9B2C309AE369B4D6A825966E4A3F" xlink:to="loc_us-gaap_InternalUseSoftwarePolicy_331C0734B875F0B65D80A825966EC4A9" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_DA38F204C1A0F3A6F00DA825966ECB62" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1ACB9B2C309AE369B4D6A825966E4A3F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_DA38F204C1A0F3A6F00DA825966ECB62" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesEarningsPerSharePolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesExpendituresBillableToClientsPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesForeignCurrenciesPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesGoodwillAndOtherIntangibleAssetsPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesIncomeTaxesPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesInvestmentsPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesPensionAndPostretirementBenefitsPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesPrinciplesOfConsolidationPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesPropertyAndEquipmentPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesReclassificationsPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesRedeemableNoncontrollingInterestsPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesRevenueRecognitionPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesShortTermMarketableSecuritiesPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesStockBasedCompensationPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesTreasuryStockPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SummaryOfSignificantAccountingPoliciesUseOfEstimatesPolicies" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SupplementalCashFlowInformationDetails" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SupplementaryDataNotes" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/SupplementaryDataPropertyAndEquipmentDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_66A30D8764068A628882A847D1FFBB86" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_66A30D8764068A628882A847D1FFBB86" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_26721EE49750C27298AFA847D1FF3ACF" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_66A30D8764068A628882A847D1FFBB86" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_26721EE49750C27298AFA847D1FF3ACF" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_92CB0343E241F645BBD5A847D1FF3CAD_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_26721EE49750C27298AFA847D1FF3ACF" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_92CB0343E241F645BBD5A847D1FF3CAD_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_92CB0343E241F645BBD5A847D1FF3CAD" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_26721EE49750C27298AFA847D1FF3ACF" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_92CB0343E241F645BBD5A847D1FF3CAD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_867C17E4006533F78250A84B39AE05FA" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_867C17E4006533F78250A84B39AE05FA" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_FurnitureAndFixturesGross" xlink:label="loc_us-gaap_FurnitureAndFixturesGross_02E0E5A03ED62A4A3AD7A847D1FF0311" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:to="loc_us-gaap_FurnitureAndFixturesGross_02E0E5A03ED62A4A3AD7A847D1FF0311" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_LeaseholdImprovementsGross" xlink:label="loc_us-gaap_LeaseholdImprovementsGross_EC4AAD76C27762ABFE6AA847D1FF9D6C" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:to="loc_us-gaap_LeaseholdImprovementsGross_EC4AAD76C27762ABFE6AA847D1FF9D6C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_CapitalizedComputerSoftwareGross" xlink:label="loc_us-gaap_CapitalizedComputerSoftwareGross_0B2EAB68A0B282302195A847D1FF935F" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:to="loc_us-gaap_CapitalizedComputerSoftwareGross_0B2EAB68A0B282302195A847D1FF935F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_Land" xlink:label="loc_us-gaap_Land_FC61C67D381A8E4518ABA847D1FF878C" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:to="loc_us-gaap_Land_FC61C67D381A8E4518ABA847D1FF878C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_938599E8976F32A6E56FA847D1FF9412" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_938599E8976F32A6E56FA847D1FF9412" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_5FCA1D6CF43C521E39EEA847D2001BA3" xlink:type="locator" />
    <definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_5FCA1D6CF43C521E39EEA847D2001BA3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_D10B6C19D0245964C127A847D20050AD" xlink:type="locator" />
    <definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_CF8C426B4B1D436099CDA847D1FF19A4" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_D10B6C19D0245964C127A847D20050AD" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/SupplementaryDataTables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/Tables" xlink:type="extended" />
  <definitionLink xlink:role="http://www.interpublic.com/role/UnrecognizedTaxBenefitsDetails" xlink:type="extended">
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxContingencyLineItems" xlink:label="loc_us-gaap_IncomeTaxContingencyLineItems_64C44601FF654606BD89B43C0A95B4BC" xlink:type="locator" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxContingencyTable" xlink:label="loc_us-gaap_IncomeTaxContingencyTable_2F5D91490F827DD56FDBB43C0A95A429" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_64C44601FF654606BD89B43C0A95B4BC" xlink:to="loc_us-gaap_IncomeTaxContingencyTable_2F5D91490F827DD56FDBB43C0A95A429" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_34EA2B00CF3A306873CBB43C0A95E732" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_2F5D91490F827DD56FDBB43C0A95A429" xlink:to="loc_us-gaap_RangeAxis_34EA2B00CF3A306873CBB43C0A95E732" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_451E2F1B8A806DD01527B43C0A952A32_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_34EA2B00CF3A306873CBB43C0A95E732" xlink:to="loc_us-gaap_RangeMember_451E2F1B8A806DD01527B43C0A952A32_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_451E2F1B8A806DD01527B43C0A952A32" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_34EA2B00CF3A306873CBB43C0A95E732" xlink:to="loc_us-gaap_RangeMember_451E2F1B8A806DD01527B43C0A952A32" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_44D59FA3E936B878FE84B43C0A95F257" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_451E2F1B8A806DD01527B43C0A952A32" xlink:to="loc_us-gaap_MinimumMember_44D59FA3E936B878FE84B43C0A95F257" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_3E9F87C72DDC6B9BEC5DB43C0A958BCE" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_451E2F1B8A806DD01527B43C0A952A32" xlink:to="loc_us-gaap_MaximumMember_3E9F87C72DDC6B9BEC5DB43C0A958BCE" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_EDF62C28CC1E7852A8D1B43C0A95FB9F" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_2F5D91490F827DD56FDBB43C0A95A429" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_EDF62C28CC1E7852A8D1B43C0A95FB9F" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_72D65480F8C46C2DE722B43C0A954D20_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_EDF62C28CC1E7852A8D1B43C0A95FB9F" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_72D65480F8C46C2DE722B43C0A954D20_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_72D65480F8C46C2DE722B43C0A954D20" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_EDF62C28CC1E7852A8D1B43C0A95FB9F" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_72D65480F8C46C2DE722B43C0A954D20" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_ForeignCountryMember" xlink:label="loc_us-gaap_ForeignCountryMember_3CD494AF316FC919850AB43C0A9522DB" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_72D65480F8C46C2DE722B43C0A954D20" xlink:to="loc_us-gaap_ForeignCountryMember_3CD494AF316FC919850AB43C0A9522DB" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_6F57F2C36F185D508673B43C0A952B5D" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_72D65480F8C46C2DE722B43C0A954D20" xlink:to="loc_us-gaap_DomesticCountryMember_6F57F2C36F185D508673B43C0A952B5D" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_DD9F0CB4AE7F8EED8111B43C0A957971" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_72D65480F8C46C2DE722B43C0A954D20" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_DD9F0CB4AE7F8EED8111B43C0A957971" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityNameAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameAxis_80F854A46F1A5C6BB84BB43C0A950019" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_2F5D91490F827DD56FDBB43C0A95A429" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameAxis_80F854A46F1A5C6BB84BB43C0A950019" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_55F54418814F2C639942B43C0A95B549_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_80F854A46F1A5C6BB84BB43C0A950019" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_55F54418814F2C639942B43C0A95B549_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxAuthorityNameDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityNameDomain_55F54418814F2C639942B43C0A95B549" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityNameAxis_80F854A46F1A5C6BB84BB43C0A950019" xlink:to="loc_us-gaap_IncomeTaxAuthorityNameDomain_55F54418814F2C639942B43C0A95B549" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TaxPeriodAxis" xlink:label="loc_us-gaap_TaxPeriodAxis_63DCB83DAD01BB234C9EB43C0A950E22" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_2F5D91490F827DD56FDBB43C0A95A429" xlink:to="loc_us-gaap_TaxPeriodAxis_63DCB83DAD01BB234C9EB43C0A950E22" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TaxPeriodDomain" xlink:label="loc_us-gaap_TaxPeriodDomain_4B3372B854DEE4BC7442B43C0A953BDD_default" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxPeriodAxis_63DCB83DAD01BB234C9EB43C0A950E22" xlink:to="loc_us-gaap_TaxPeriodDomain_4B3372B854DEE4BC7442B43C0A953BDD_default" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_TaxPeriodDomain" xlink:label="loc_us-gaap_TaxPeriodDomain_4B3372B854DEE4BC7442B43C0A953BDD" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxPeriodAxis_63DCB83DAD01BB234C9EB43C0A950E22" xlink:to="loc_us-gaap_TaxPeriodDomain_4B3372B854DEE4BC7442B43C0A953BDD" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_752065075039C1915040B43C0A953B56" xlink:type="locator" />
    <definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_64C44601FF654606BD89B43C0A95B4BC" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_752065075039C1915040B43C0A953B56" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_C2AA5FCC923CD83695F3B43C0A954D9C" xlink:type="locator" />
    <definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_64C44601FF654606BD89B43C0A95B4BC" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_C2AA5FCC923CD83695F3B43C0A954D9C" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_8DE9791029C48C9F88D1B43C0A95BCC3" xlink:type="locator" />
    <definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_64C44601FF654606BD89B43C0A95B4BC" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_8DE9791029C48C9F88D1B43C0A95BCC3" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_IncomeTaxExaminationYearUnderExamination" xlink:label="loc_us-gaap_IncomeTaxExaminationYearUnderExamination_00E2C8A37A70FF0D9B44B43C0A95A492" xlink:type="locator" />
    <definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_64C44601FF654606BD89B43C0A95B4BC" xlink:to="loc_us-gaap_IncomeTaxExaminationYearUnderExamination_00E2C8A37A70FF0D9B44B43C0A95A492" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeLowerBound" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeLowerBound_FB831E95BD977F9F2CB7B43C0A95158A" xlink:type="locator" />
    <definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_64C44601FF654606BD89B43C0A95B4BC" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeLowerBound_FB831E95BD977F9F2CB7B43C0A95158A" xlink:type="arc" />
    <loc xlink:href="http://xbrl.fasb.org/us-gaap/2014/elts/us-gaap-2014-01-31.xsd#us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound" xlink:label="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound_35E6248B46EE1E94175CB43C0A956F9A" xlink:type="locator" />
    <definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_64C44601FF654606BD89B43C0A95B4BC" xlink:to="loc_us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound_35E6248B46EE1E94175CB43C0A956F9A" xlink:type="arc" />
  </definitionLink>
  <definitionLink xlink:role="http://www.interpublic.com/role/ValuationAndQualifyingAccountsAllowanceForUncollectibleAccountsReceivableDetails" xlink:type="extended" />
</linkbase>
