<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.belden.com/role/Acquisitions" xlink:href="bdc-20170702.xsd#Acquisitions" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/AcquisitionsAdditionalInformationDetail" xlink:href="bdc-20170702.xsd#AcquisitionsAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/AcquisitionsScheduleOfAcquiredIntangibleAssetsDetails" xlink:href="bdc-20170702.xsd#AcquisitionsScheduleOfAcquiredIntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/AcquisitionsScheduleOfProFormaInformationDetails" xlink:href="bdc-20170702.xsd#AcquisitionsScheduleOfProFormaInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/AcquisitionsScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedDetails" xlink:href="bdc-20170702.xsd#AcquisitionsScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/AcquisitionsTables" xlink:href="bdc-20170702.xsd#AcquisitionsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/AssetsHeldForSale" xlink:href="bdc-20170702.xsd#AssetsHeldForSale" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/AssetsHeldForSaleDetails" xlink:href="bdc-20170702.xsd#AssetsHeldForSaleDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/AssetsHeldForSaleTables" xlink:href="bdc-20170702.xsd#AssetsHeldForSaleTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLoss" xlink:href="bdc-20170702.xsd#ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossComponentsOfOtherComprehensiveIncomeLossNetOfTaxDetail" xlink:href="bdc-20170702.xsd#ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossComponentsOfOtherComprehensiveIncomeLossNetOfTaxDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossSummaryOfEffectsOfReclassificationsFromAccumulatedOtherComprehensiveIncomeLossDetail" xlink:href="bdc-20170702.xsd#ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossSummaryOfEffectsOfReclassificationsFromAccumulatedOtherComprehensiveIncomeLossDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossTables" xlink:href="bdc-20170702.xsd#ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossTotalComprehensiveIncomeDetail" xlink:href="bdc-20170702.xsd#ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossTotalComprehensiveIncomeDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/CondensedConsolidatedBalanceSheets" xlink:href="bdc-20170702.xsd#CondensedConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/CondensedConsolidatedCashFlowStatementsUnaudited" xlink:href="bdc-20170702.xsd#CondensedConsolidatedCashFlowStatementsUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/CondensedConsolidatedStatementsOfOperationsAndComprehensiveIncomeUnaudited" xlink:href="bdc-20170702.xsd#CondensedConsolidatedStatementsOfOperationsAndComprehensiveIncomeUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/CondensedConsolidatedStockholdersEquityStatementUnaudited" xlink:href="bdc-20170702.xsd#CondensedConsolidatedStockholdersEquityStatementUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/CondensedConsolidatedStockholdersEquityStatementUnauditedParenthetical" xlink:href="bdc-20170702.xsd#CondensedConsolidatedStockholdersEquityStatementUnauditedParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/DocumentAndEntityInformation" xlink:href="bdc-20170702.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/IncomePerShare" xlink:href="bdc-20170702.xsd#IncomePerShare" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/IncomePerShareAdditionalInformationDetail" xlink:href="bdc-20170702.xsd#IncomePerShareAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/IncomePerShareBasisForIncomePerShareComputationsDetail" xlink:href="bdc-20170702.xsd#IncomePerShareBasisForIncomePerShareComputationsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/IncomePerShareTables" xlink:href="bdc-20170702.xsd#IncomePerShareTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/IncomeTaxes" xlink:href="bdc-20170702.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/IncomeTaxesAdditionalInformationDetail" xlink:href="bdc-20170702.xsd#IncomeTaxesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/Inventories" xlink:href="bdc-20170702.xsd#Inventories" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/InventoriesMajorClassesOfInventoriesDetail" xlink:href="bdc-20170702.xsd#InventoriesMajorClassesOfInventoriesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/InventoriesTables" xlink:href="bdc-20170702.xsd#InventoriesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/LongLivedAssets" xlink:href="bdc-20170702.xsd#LongLivedAssets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/LongLivedAssetsAdditionalInformationDetail" xlink:href="bdc-20170702.xsd#LongLivedAssetsAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/LongTermDebtAndOtherBorrowingArrangements" xlink:href="bdc-20170702.xsd#LongTermDebtAndOtherBorrowingArrangements" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/LongTermDebtAndOtherBorrowingArrangementsAdditionalInformationDetail" xlink:href="bdc-20170702.xsd#LongTermDebtAndOtherBorrowingArrangementsAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/LongTermDebtAndOtherBorrowingArrangementsCarryingValuesOfLongTermDebtAndOtherBorrowingArrangementsDetail" xlink:href="bdc-20170702.xsd#LongTermDebtAndOtherBorrowingArrangementsCarryingValuesOfLongTermDebtAndOtherBorrowingArrangementsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/LongTermDebtAndOtherBorrowingArrangementsTables" xlink:href="bdc-20170702.xsd#LongTermDebtAndOtherBorrowingArrangementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/NetInvestmentHedge" xlink:href="bdc-20170702.xsd#NetInvestmentHedge" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/NetInvestmentHedgeDetails" xlink:href="bdc-20170702.xsd#NetInvestmentHedgeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/OperatingSegments" xlink:href="bdc-20170702.xsd#OperatingSegments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/OperatingSegmentsAdditionalInformationDetail" xlink:href="bdc-20170702.xsd#OperatingSegmentsAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/OperatingSegmentsOperatingSegmentInformationDetail" xlink:href="bdc-20170702.xsd#OperatingSegmentsOperatingSegmentInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/OperatingSegmentsReconciliationOfTotalReportableSegmentsRevenuesAndEbitdaToConsolidatedRevenuesAndConsolidatedIncomeFromContinuingOperationsBeforeTaxesDetail" xlink:href="bdc-20170702.xsd#OperatingSegmentsReconciliationOfTotalReportableSegmentsRevenuesAndEbitdaToConsolidatedRevenuesAndConsolidatedIncomeFromContinuingOperationsBeforeTaxesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/OperatingSegmentsTables" xlink:href="bdc-20170702.xsd#OperatingSegmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/PensionAndOtherPostretirementObligations" xlink:href="bdc-20170702.xsd#PensionAndOtherPostretirementObligations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/PensionAndOtherPostretirementObligationsComponentsOfNetPeriodicBenefitCostsDetail" xlink:href="bdc-20170702.xsd#PensionAndOtherPostretirementObligationsComponentsOfNetPeriodicBenefitCostsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/PensionAndOtherPostretirementObligationsTables" xlink:href="bdc-20170702.xsd#PensionAndOtherPostretirementObligationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/PreferredStock" xlink:href="bdc-20170702.xsd#PreferredStock" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/PreferredStockDetails" xlink:href="bdc-20170702.xsd#PreferredStockDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/SeveranceRestructuringAndAcquisitionIntegrationActivities" xlink:href="bdc-20170702.xsd#SeveranceRestructuringAndAcquisitionIntegrationActivities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/SeveranceRestructuringAndAcquisitionIntegrationActivitiesAdditionalInformationDetail" xlink:href="bdc-20170702.xsd#SeveranceRestructuringAndAcquisitionIntegrationActivitiesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/SeveranceRestructuringAndAcquisitionIntegrationActivitiesSeveranceRestructuringAndIntegrationCostsBySegmentDetail" xlink:href="bdc-20170702.xsd#SeveranceRestructuringAndAcquisitionIntegrationActivitiesSeveranceRestructuringAndIntegrationCostsBySegmentDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/SeveranceRestructuringAndAcquisitionIntegrationActivitiesTables" xlink:href="bdc-20170702.xsd#SeveranceRestructuringAndAcquisitionIntegrationActivitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/ShareRepurchasesDetails" xlink:href="bdc-20170702.xsd#ShareRepurchasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/ShareRepurchasesShareRepurchases" xlink:href="bdc-20170702.xsd#ShareRepurchasesShareRepurchases" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/SubsequentEvents" xlink:href="bdc-20170702.xsd#SubsequentEvents" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/SubsequentEventsDetails" xlink:href="bdc-20170702.xsd#SubsequentEventsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/SummaryOfSignificantAccountingPolicies" xlink:href="bdc-20170702.xsd#SummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:href="bdc-20170702.xsd#SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.belden.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:href="bdc-20170702.xsd#SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple" />
  <link:definitionLink xlink:role="http://www.belden.com/role/Acquisitions" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/AcquisitionsAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_9A2159FEFE210DF5BE11A5515B63C366" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_CAAE6713F27EDADA4E57A5515B63C3F5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9A2159FEFE210DF5BE11A5515B63C366" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_CAAE6713F27EDADA4E57A5515B63C3F5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_12914EE2DE39D825FC16A5515B6333A2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_CAAE6713F27EDADA4E57A5515B63C3F5" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_12914EE2DE39D825FC16A5515B6333A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_772B82B18E1FCD7844F6A5515B634AB9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_12914EE2DE39D825FC16A5515B6333A2" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_772B82B18E1FCD7844F6A5515B634AB9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_772B82B18E1FCD7844F6A5515B634AB9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_12914EE2DE39D825FC16A5515B6333A2" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_772B82B18E1FCD7844F6A5515B634AB9" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_ThinklogicalHoldingsLLCMember" xlink:label="loc_bdc_ThinklogicalHoldingsLLCMember_8AC45F66D79967B4CD15A5515B63ECC1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_772B82B18E1FCD7844F6A5515B634AB9" xlink:to="loc_bdc_ThinklogicalHoldingsLLCMember_8AC45F66D79967B4CD15A5515B63ECC1" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_M2FxLimitedMember" xlink:label="loc_bdc_M2FxLimitedMember_B3F0430D7EE36C1564ADA5515B63BE37" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_772B82B18E1FCD7844F6A5515B634AB9" xlink:to="loc_bdc_M2FxLimitedMember_B3F0430D7EE36C1564ADA5515B63BE37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_66FC3C132370D306B6D4A5515B64BECF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9A2159FEFE210DF5BE11A5515B63C366" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_66FC3C132370D306B6D4A5515B64BECF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_E32AEF4C6C128D52918BA5515B64817C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9A2159FEFE210DF5BE11A5515B63C366" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_E32AEF4C6C128D52918BA5515B64817C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationAcquiredReceivablesFairValue" xlink:label="loc_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_71AAE511B438C33A6499A5515B6459E7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9A2159FEFE210DF5BE11A5515B63C366" xlink:to="loc_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_71AAE511B438C33A6499A5515B6459E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount" xlink:label="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_D289810E538B4E076C66A5515B647382" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9A2159FEFE210DF5BE11A5515B63C366" xlink:to="loc_us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount_D289810E538B4E076C66A5515B647382" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_BusinessAcquisitionGoodwillExpectedTaxDeductibleAmountPeriod" xlink:label="loc_bdc_BusinessAcquisitionGoodwillExpectedTaxDeductibleAmountPeriod_159B422B512570ABAD24A5515B646EC3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9A2159FEFE210DF5BE11A5515B63C366" xlink:to="loc_bdc_BusinessAcquisitionGoodwillExpectedTaxDeductibleAmountPeriod_159B422B512570ABAD24A5515B646EC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_8A54CFE11DC088E36C47A5515B64C703" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_9A2159FEFE210DF5BE11A5515B63C366" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_8A54CFE11DC088E36C47A5515B64C703" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/AcquisitionsScheduleOfAcquiredIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_E58369EDA6AE3D6D9301A5515B5A2B4F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_400C76C8BFA7DA2A47CEA5515B59E07B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_E58369EDA6AE3D6D9301A5515B5A2B4F" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_400C76C8BFA7DA2A47CEA5515B59E07B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_F47A01BD55E60BE2FC8FA5515B590DE1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_400C76C8BFA7DA2A47CEA5515B59E07B" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_F47A01BD55E60BE2FC8FA5515B590DE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_4B19146A08EAE4DAAC4BA5515B599D6C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_F47A01BD55E60BE2FC8FA5515B590DE1" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_4B19146A08EAE4DAAC4BA5515B599D6C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_4B19146A08EAE4DAAC4BA5515B599D6C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_F47A01BD55E60BE2FC8FA5515B590DE1" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_4B19146A08EAE4DAAC4BA5515B599D6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillMember" xlink:label="loc_us-gaap_GoodwillMember_9D1F338BAB41E7C50CEFA5515B59D793" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_4B19146A08EAE4DAAC4BA5515B599D6C" xlink:to="loc_us-gaap_GoodwillMember_9D1F338BAB41E7C50CEFA5515B59D793" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0F3EB1871C1BA5F227BCA5515B5AC875" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_400C76C8BFA7DA2A47CEA5515B59E07B" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0F3EB1871C1BA5F227BCA5515B5AC875" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F5785338CAFD85D63F8A5515B5AF7FE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0F3EB1871C1BA5F227BCA5515B5AC875" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F5785338CAFD85D63F8A5515B5AF7FE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F5785338CAFD85D63F8A5515B5AF7FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_0F3EB1871C1BA5F227BCA5515B5AC875" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F5785338CAFD85D63F8A5515B5AF7FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_586D82BE8CD9A10831A8A5515B5A8156" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F5785338CAFD85D63F8A5515B5AF7FE" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_586D82BE8CD9A10831A8A5515B5A8156" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_5264E7C699DE11085D61A5515B5AACF2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F5785338CAFD85D63F8A5515B5AF7FE" xlink:to="loc_us-gaap_CustomerRelationshipsMember_5264E7C699DE11085D61A5515B5AACF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_2DD777D9ECCC484E2AF5A5515B5AD41C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F5785338CAFD85D63F8A5515B5AF7FE" xlink:to="loc_us-gaap_TrademarksMember_2DD777D9ECCC484E2AF5A5515B5AD41C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OrderOrProductionBacklogMember" xlink:label="loc_us-gaap_OrderOrProductionBacklogMember_35BAC5E7C7E127B975BCA5515B5A1DBE" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_6F5785338CAFD85D63F8A5515B5AF7FE" xlink:to="loc_us-gaap_OrderOrProductionBacklogMember_35BAC5E7C7E127B975BCA5515B5A1DBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_BD38320FF3F9491A2BD2A5515B5AD0E4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_400C76C8BFA7DA2A47CEA5515B59E07B" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_BD38320FF3F9491A2BD2A5515B5AD0E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_711179FE23F2FD5D521FA5515B5A2332_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_BD38320FF3F9491A2BD2A5515B5AD0E4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_711179FE23F2FD5D521FA5515B5A2332_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_711179FE23F2FD5D521FA5515B5A2332" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_BD38320FF3F9491A2BD2A5515B5AD0E4" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_711179FE23F2FD5D521FA5515B5A2332" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_ThinklogicalHoldingsLLCMember" xlink:label="loc_bdc_ThinklogicalHoldingsLLCMember_6C86AF3503D794CF0444A5515B5A4D20" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_711179FE23F2FD5D521FA5515B5A2332" xlink:to="loc_bdc_ThinklogicalHoldingsLLCMember_6C86AF3503D794CF0444A5515B5A4D20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_B6707A5AF9762304E8B9A5515B5AF42C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_E58369EDA6AE3D6D9301A5515B5A2B4F" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_B6707A5AF9762304E8B9A5515B5AF42C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_EE5975A52B9E442122DFA5515B5A4236" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_E58369EDA6AE3D6D9301A5515B5A2B4F" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_EE5975A52B9E442122DFA5515B5A4236" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_A577BFBDBE096D2C33AEA5515B5AAF4E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_E58369EDA6AE3D6D9301A5515B5A2B4F" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets_A577BFBDBE096D2C33AEA5515B5AAF4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_BE2C2206644FDE91F8FDA5515B5AC07D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_E58369EDA6AE3D6D9301A5515B5A2B4F" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_BE2C2206644FDE91F8FDA5515B5AC07D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/AcquisitionsScheduleOfProFormaInformationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_4200FE0D9EC1057742B3A5515B557F0D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_819C6218186407E93253A5515B558D43" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4200FE0D9EC1057742B3A5515B557F0D" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_819C6218186407E93253A5515B558D43" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_32B1E74364ED09AC44B5A5515B557E4E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_819C6218186407E93253A5515B558D43" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_32B1E74364ED09AC44B5A5515B557E4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_AE919B28D997CC498416A5515B558326_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_32B1E74364ED09AC44B5A5515B557E4E" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_AE919B28D997CC498416A5515B558326_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_AE919B28D997CC498416A5515B558326" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_32B1E74364ED09AC44B5A5515B557E4E" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_AE919B28D997CC498416A5515B558326" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_ThinklogicalHoldingsLLCMember" xlink:label="loc_bdc_ThinklogicalHoldingsLLCMember_C7B24657879DFA6B440CA5515B55C9CA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_AE919B28D997CC498416A5515B558326" xlink:to="loc_bdc_ThinklogicalHoldingsLLCMember_C7B24657879DFA6B440CA5515B55C9CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_7E2139D066B42883A642A5515B55E259" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4200FE0D9EC1057742B3A5515B557F0D" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaRevenue_7E2139D066B42883A642A5515B55E259" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_87336C629366ECA2E8A2A5515B55B273" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4200FE0D9EC1057742B3A5515B557F0D" xlink:to="loc_us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_87336C629366ECA2E8A2A5515B55B273" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted" xlink:label="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_5B2D9CC74ACF0B885C41A5515B554629" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_4200FE0D9EC1057742B3A5515B557F0D" xlink:to="loc_us-gaap_BusinessAcquisitionProFormaEarningsPerShareDiluted_5B2D9CC74ACF0B885C41A5515B554629" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/AcquisitionsScheduleOfRecognizedIdentifiedAssetsAcquiredAndLiabilitiesAssumedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_117E3C5B000550B17936A5515B5F7B2D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_42A760A328F4730CEDDEA5515B5F3A60" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_117E3C5B000550B17936A5515B5F7B2D" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_42A760A328F4730CEDDEA5515B5F3A60" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_A6C8EEB64DE73BA97E01A5515B5FE5EC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_42A760A328F4730CEDDEA5515B5F3A60" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_A6C8EEB64DE73BA97E01A5515B5FE5EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9DF2E4F2FE8ACB60F7EA5515B5F1DBD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_A6C8EEB64DE73BA97E01A5515B5FE5EC" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9DF2E4F2FE8ACB60F7EA5515B5F1DBD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9DF2E4F2FE8ACB60F7EA5515B5F1DBD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_A6C8EEB64DE73BA97E01A5515B5FE5EC" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9DF2E4F2FE8ACB60F7EA5515B5F1DBD" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_ThinklogicalHoldingsLLCMember" xlink:label="loc_bdc_ThinklogicalHoldingsLLCMember_DAB38E5D4B73830CD2B9A5515B5FDBC1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_C9DF2E4F2FE8ACB60F7EA5515B5F1DBD" xlink:to="loc_bdc_ThinklogicalHoldingsLLCMember_DAB38E5D4B73830CD2B9A5515B5FDBC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_117E3C5B000550B17936A5515B5F7B2D" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_65F05B315DB8E9821ECFA5515B5F5344" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_65F05B315DB8E9821ECFA5515B5F5344" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationAcquiredReceivablesFairValue" xlink:label="loc_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_D44862BF4776C5D4694AA5515B5FE335" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:to="loc_us-gaap_BusinessCombinationAcquiredReceivablesFairValue_D44862BF4776C5D4694AA5515B5FE335" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_63A532BB84A2E020FC50A5515B5FBD8D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_63A532BB84A2E020FC50A5515B5FBD8D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_96CDAE54A656A35CF0BFA5515B60D897" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets_96CDAE54A656A35CF0BFA5515B60D897" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_DAF566123FAC1937C534A5515B60DE7F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_DAF566123FAC1937C534A5515B60DE7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_537610A8170183C902EDA590F6A27B43" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_537610A8170183C902EDA590F6A27B43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_58F0D7838B586B296CA3A5515B600701" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:to="loc_us-gaap_Goodwill_58F0D7838B586B296CA3A5515B600701" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_93472E3071F9A9284AB9A5515B604808" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAbstract_D2E5B9832357366FE301A5515B5F74AC" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_93472E3071F9A9284AB9A5515B604808" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_DB04599F124FB0CDA86AA5515B60C851" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_117E3C5B000550B17936A5515B5F7B2D" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_DB04599F124FB0CDA86AA5515B60C851" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_1A3130C4B6B2E1ED894CA5515B6051C2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_DB04599F124FB0CDA86AA5515B60C851" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_1A3130C4B6B2E1ED894CA5515B6051C2" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccruedLiabilities" xlink:label="loc_bdc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccruedLiabilities_3856ECB9420208451E31A5515B6084CC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_DB04599F124FB0CDA86AA5515B60C851" xlink:to="loc_bdc_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedAccruedLiabilities_3856ECB9420208451E31A5515B6084CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_3F8736E6F66A1348DEE2A5515B6003A8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_DB04599F124FB0CDA86AA5515B60C851" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesDeferredRevenue_3F8736E6F66A1348DEE2A5515B6003A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_95C61655A06E3CEF1CD7A5515B603828" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilitiesAbstract_DB04599F124FB0CDA86AA5515B60C851" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_95C61655A06E3CEF1CD7A5515B603828" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_9132B942B632D8FCBDBFA5515B609876" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_117E3C5B000550B17936A5515B5F7B2D" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_9132B942B632D8FCBDBFA5515B609876" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/AcquisitionsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/AssetsHeldForSale" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/AssetsHeldForSaleDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_F44A9C3FBD24D06D2D02A5515B4DE1FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_F44A9C3FBD24D06D2D02A5515B4DE1FB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BB9ABD3921AABE64726EA5515B4D90D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_F44A9C3FBD24D06D2D02A5515B4DE1FB" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BB9ABD3921AABE64726EA5515B4D90D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_C1572009550395BEFC26A5515B4E5625_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BB9ABD3921AABE64726EA5515B4D90D2" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_C1572009550395BEFC26A5515B4E5625_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_C1572009550395BEFC26A5515B4E5625" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_BB9ABD3921AABE64726EA5515B4D90D2" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_C1572009550395BEFC26A5515B4E5625" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_HirschmannJvMember" xlink:label="loc_bdc_HirschmannJvMember_7C9B45AA9DE4AC5B91B7A5515B4E573A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_C1572009550395BEFC26A5515B4E5625" xlink:to="loc_bdc_HirschmannJvMember_7C9B45AA9DE4AC5B91B7A5515B4E573A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationAxis" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_01B412ECBD688E64FB8FA5515B4E2F11" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_F44A9C3FBD24D06D2D02A5515B4DE1FB" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_01B412ECBD688E64FB8FA5515B4E2F11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_BCEB09A30707BC74E991A5515B4EA85B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_01B412ECBD688E64FB8FA5515B4E2F11" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_BCEB09A30707BC74E991A5515B4EA85B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupClassificationDomain" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_BCEB09A30707BC74E991A5515B4EA85B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_01B412ECBD688E64FB8FA5515B4E2F11" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_BCEB09A30707BC74E991A5515B4EA85B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DiscontinuedOperationsHeldforsaleMember" xlink:label="loc_us-gaap_DiscontinuedOperationsHeldforsaleMember_1D253633263534DBD915A5515B4ECAED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_BCEB09A30707BC74E991A5515B4EA85B" xlink:to="loc_us-gaap_DiscontinuedOperationsHeldforsaleMember_1D253633263534DBD915A5515B4ECAED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_4AD59394E199C27CAA6FA5515B4EC9A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_4AD59394E199C27CAA6FA5515B4EC9A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_6A110FDCA365F05FF46BA5515B4E3295" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_6A110FDCA365F05FF46BA5515B4E3295" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet_F6368EECB872B67D123BA5515B4EDEEE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet_F6368EECB872B67D123BA5515B4EDEEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationInventoryCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationInventoryCurrent_01F4356072104EA7C5C9A5515B4E49CC" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationInventoryCurrent_01F4356072104EA7C5C9A5515B4E49CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets_ED1FAB38773CD43D92ADA5515B4E5946" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherCurrentAssets_ED1FAB38773CD43D92ADA5515B4E5946" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent_E5DB738D422E95FCFE6CA5515B4EF124" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentCurrent_E5DB738D422E95FCFE6CA5515B4EF124" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsCurrent_98AEF3AFCF109B499120A5515B4EE467" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationIntangibleAssetsCurrent_98AEF3AFCF109B499120A5515B4EE467" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent_3E0328A78DEEF008E0DEA5515B4EECE7" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGoodwillCurrent_3E0328A78DEEF008E0DEA5515B4EECE7" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_DisposalGroupIncludingDiscontinuedOperationOtherLongLivedAssetsCurrent" xlink:label="loc_bdc_DisposalGroupIncludingDiscontinuedOperationOtherLongLivedAssetsCurrent_911EF0A1A02B4B036B3CA5515B4FE8D2" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_bdc_DisposalGroupIncludingDiscontinuedOperationOtherLongLivedAssetsCurrent_911EF0A1A02B4B036B3CA5515B4FE8D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent" xlink:label="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_C60A0C0B97CA3D848A51A5515B4F44B2" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent_C60A0C0B97CA3D848A51A5515B4F44B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_68F68C9676F5168D0B3DA5515B4F383D" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_68F68C9676F5168D0B3DA5515B4F383D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsHeldForSaleNotPartOfDisposalGroup" xlink:label="loc_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroup_A9F5AC1AA491D5CB9ADCA5515B4FF3C4" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_AssetsHeldForSaleNotPartOfDisposalGroup_A9F5AC1AA491D5CB9ADCA5515B4FF3C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent_AB09AF9DB85A46417E4CA5515B4F0E7A" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationAccruedLiabilitiesCurrent_AB09AF9DB85A46417E4CA5515B4F0E7A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationPostretirementPlanBenefitObligationCurrent" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPostretirementPlanBenefitObligationCurrent_CEB89335A8181A88A082A5515B4FE8C0" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationPostretirementPlanBenefitObligationCurrent_CEB89335A8181A88A082A5515B4FE8C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent" xlink:label="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_6264B88F337931863802A5515B4F0143" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_CA2079179E28303F6164A5515B4E4ABB" xlink:to="loc_us-gaap_LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent_6264B88F337931863802A5515B4F0143" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/AssetsHeldForSaleTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLoss" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossComponentsOfOtherComprehensiveIncomeLossNetOfTaxDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8F8E97ED010FD44B470BA5BF88C536DA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_FE18C6E63FE2701ADF47A5BF88C58A56" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8F8E97ED010FD44B470BA5BF88C536DA" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_FE18C6E63FE2701ADF47A5BF88C58A56" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_B6D33F769C0828CADA31A5BF88C50098" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_FE18C6E63FE2701ADF47A5BF88C58A56" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_B6D33F769C0828CADA31A5BF88C50098" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_268F6850692B1480C561A5BF88C579B0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_B6D33F769C0828CADA31A5BF88C50098" xlink:to="loc_us-gaap_EquityComponentDomain_268F6850692B1480C561A5BF88C579B0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_268F6850692B1480C561A5BF88C579B0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_B6D33F769C0828CADA31A5BF88C50098" xlink:to="loc_us-gaap_EquityComponentDomain_268F6850692B1480C561A5BF88C579B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_24AE6C0EFFE79AD27CD9A5BF88C59082" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_268F6850692B1480C561A5BF88C579B0" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_24AE6C0EFFE79AD27CD9A5BF88C59082" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_A0F779CE7214396B9BF6A5BF88C58A12" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_268F6850692B1480C561A5BF88C579B0" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_A0F779CE7214396B9BF6A5BF88C58A12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember" xlink:label="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_D7807580AFCD1C231DD6A5BF88C5354C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_268F6850692B1480C561A5BF88C579B0" xlink:to="loc_us-gaap_AociIncludingPortionAttributableToNoncontrollingInterestMember_D7807580AFCD1C231DD6A5BF88C5354C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_BA446071A035DE3873CEA5BF88C5A9D9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8F8E97ED010FD44B470BA5BF88C536DA" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_BA446071A035DE3873CEA5BF88C5A9D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_4FFD2312E3CC04EE1787A5BF88C6B762" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_BA446071A035DE3873CEA5BF88C5A9D9" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_4FFD2312E3CC04EE1787A5BF88C6B762" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_A4BE0B1A712732951E18A5BF88C684B2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_BA446071A035DE3873CEA5BF88C5A9D9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_A4BE0B1A712732951E18A5BF88C684B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_CFC0649392C437BB23B6A5BF88C6CB38" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_BA446071A035DE3873CEA5BF88C5A9D9" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_CFC0649392C437BB23B6A5BF88C6CB38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_6EBB238531CB3CB709F8A5BF88C6228A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_BA446071A035DE3873CEA5BF88C5A9D9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_6EBB238531CB3CB709F8A5BF88C6228A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossSummaryOfEffectsOfReclassificationsFromAccumulatedOtherComprehensiveIncomeLossDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_6523B166122E970BB7F3A5515AB11650" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_CED05240E465A33B61E8A5515AB0D706" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_6523B166122E970BB7F3A5515AB11650" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_CED05240E465A33B61E8A5515AB0D706" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_16905911C8839EA97CC9A5515AB03983" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_CED05240E465A33B61E8A5515AB0D706" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_16905911C8839EA97CC9A5515AB03983" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_553C3707E4BB71B5BB24A5515AB0EB48_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_16905911C8839EA97CC9A5515AB03983" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_553C3707E4BB71B5BB24A5515AB0EB48_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_553C3707E4BB71B5BB24A5515AB0EB48" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_16905911C8839EA97CC9A5515AB03983" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_553C3707E4BB71B5BB24A5515AB0EB48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_64C9C2AA264A15F4BD5AA5515AB0F7CB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_553C3707E4BB71B5BB24A5515AB0EB48" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_64C9C2AA264A15F4BD5AA5515AB0F7CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_C5DAA3CAAD0681384FC1A5515AB0E733" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_CED05240E465A33B61E8A5515AB0D706" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_C5DAA3CAAD0681384FC1A5515AB0E733" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_1273C08736DFAFF52AECA5515AB19AE9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_C5DAA3CAAD0681384FC1A5515AB0E733" xlink:to="loc_us-gaap_EquityComponentDomain_1273C08736DFAFF52AECA5515AB19AE9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_1273C08736DFAFF52AECA5515AB19AE9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_C5DAA3CAAD0681384FC1A5515AB0E733" xlink:to="loc_us-gaap_EquityComponentDomain_1273C08736DFAFF52AECA5515AB19AE9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_0275197C573F46C93650A5515AB1A7A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1273C08736DFAFF52AECA5515AB19AE9" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_0275197C573F46C93650A5515AB1A7A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_2E195F4895EE6659BE32A5515AB1F2A1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1273C08736DFAFF52AECA5515AB19AE9" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_2E195F4895EE6659BE32A5515AB1F2A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_A40ADA960B7B14BF367EA5515AB1206B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1273C08736DFAFF52AECA5515AB19AE9" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_A40ADA960B7B14BF367EA5515AB1206B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_C01640E5F6E22C021BF7A5515AB1CAC3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_6523B166122E970BB7F3A5515AB11650" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_C01640E5F6E22C021BF7A5515AB1CAC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_579A6DA58C29898C6BE9A5515AB30BB1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_6523B166122E970BB7F3A5515AB11650" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_579A6DA58C29898C6BE9A5515AB30BB1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_4619E10A1C0318B6227DA5515AB3959A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_6523B166122E970BB7F3A5515AB11650" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_4619E10A1C0318B6227DA5515AB3959A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/ComprehensiveIncomeAndAccumulatedOtherComprehensiveIncomeLossTotalComprehensiveIncomeDetail" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/CondensedConsolidatedCashFlowStatementsUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/CondensedConsolidatedStatementsOfOperationsAndComprehensiveIncomeUnaudited" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/CondensedConsolidatedStockholdersEquityStatementUnaudited" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_28A7AB529D7D38799942A5515B791A6A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_35442F08C6B3FF56666EA5515B78530F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_28A7AB529D7D38799942A5515B791A6A" xlink:to="loc_us-gaap_StatementTable_35442F08C6B3FF56666EA5515B78530F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_4026784938DD548ED0E3A5515B7836FA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_35442F08C6B3FF56666EA5515B78530F" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_4026784938DD548ED0E3A5515B7836FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_4026784938DD548ED0E3A5515B7836FA" xlink:to="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_4026784938DD548ED0E3A5515B7836FA" xlink:to="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_A0646BF5E8C51D9C64B9A5515B79E1FD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D" xlink:to="loc_us-gaap_PreferredStockMember_A0646BF5E8C51D9C64B9A5515B79E1FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_C76DB42A290D32288EDFA5515B79E331" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D" xlink:to="loc_us-gaap_CommonStockMember_C76DB42A290D32288EDFA5515B79E331" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_4FA31E8034C4FC9FF26CA5515B790097" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_4FA31E8034C4FC9FF26CA5515B790097" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_20022D9489D6B13EB115A5515B792889" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D" xlink:to="loc_us-gaap_RetainedEarningsMember_20022D9489D6B13EB115A5515B792889" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockMember" xlink:label="loc_us-gaap_TreasuryStockMember_FC98FAD48A6890A3347AA5515B798356" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D" xlink:to="loc_us-gaap_TreasuryStockMember_FC98FAD48A6890A3347AA5515B798356" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_F77A5989D1C1780ABAE4A5515B7994DA" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_F77A5989D1C1780ABAE4A5515B7994DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="loc_us-gaap_NoncontrollingInterestMember_F5D9AC112857EC72A988A5515B79AD0F" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_1006B83B01188056FE1EA5515B787C4D" xlink:to="loc_us-gaap_NoncontrollingInterestMember_F5D9AC112857EC72A988A5515B79AD0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_28A7AB529D7D38799942A5515B791A6A" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharesIssued" xlink:label="loc_us-gaap_SharesIssued_2176107EBB73FFBAB457A5515B791B39" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_SharesIssued_2176107EBB73FFBAB457A5515B791B39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_9763AD7F37F304292048A5515B79265D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_9763AD7F37F304292048A5515B79265D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TreasuryStockShares" xlink:label="loc_us-gaap_TreasuryStockShares_6137E1610D149E4E4AE8A5515B7957A1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_TreasuryStockShares_6137E1610D149E4E4AE8A5515B7957A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaap_ProfitLoss_BAD5B55A20FB52DC8B33A5515B79FEF1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_ProfitLoss_BAD5B55A20FB52DC8B33A5515B79FEF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_C5D750620529B5736ECFA5515B79A277" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_C5D750620529B5736ECFA5515B79A277" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_78D9F5DAB19C625A5CDDA5515B7960A7" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_78D9F5DAB19C625A5CDDA5515B7960A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_264039AC2A5F09896C9CA5515B79AA5B" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_264039AC2A5F09896C9CA5515B79AA5B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_10499D64BD7A3DE59F8DA5515B791C30" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_10499D64BD7A3DE59F8DA5515B791C30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2BD042D0AFA50388B257A58BB7A63B64" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_2BD042D0AFA50388B257A58BB7A63B64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_B509F8068A80097FB636A5515B791F76" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_B509F8068A80097FB636A5515B791F76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_0F1F1EAEF62B6D5FB1EFA58DE8023C48" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_0F1F1EAEF62B6D5FB1EFA58DE8023C48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_E0BCCB8E8CE3B412EDF3A5515B7A3E4F" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_E0BCCB8E8CE3B412EDF3A5515B7A3E4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:label="loc_us-gaap_DividendsPreferredStockCash_9223AFCF8FBC9265CACEA5515B7A39A8" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_DividendsPreferredStockCash_9223AFCF8FBC9265CACEA5515B7A39A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DividendsCommonStockCash" xlink:label="loc_us-gaap_DividendsCommonStockCash_3307102008570B15AB59A5515B7A4FF2" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_83A61E9C27BD3E91B005A5515B79A4FB" xlink:to="loc_us-gaap_DividendsCommonStockCash_3307102008570B15AB59A5515B7A4FF2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/CondensedConsolidatedStockholdersEquityStatementUnauditedParenthetical" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/DocumentAndEntityInformation" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/IncomePerShare" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/IncomePerShareAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_51775A2807FDFDDFA2CCA5515B328317" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_1C11B67EFD5EB2F648ECA5515B32E04A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_51775A2807FDFDDFA2CCA5515B328317" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_1C11B67EFD5EB2F648ECA5515B32E04A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_EFF87EA1122D8A8F92DCA5515B32F1FF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_1C11B67EFD5EB2F648ECA5515B32E04A" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_EFF87EA1122D8A8F92DCA5515B32F1FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E63746A82DDD7346444EA5515B32C2F1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_EFF87EA1122D8A8F92DCA5515B32F1FF" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E63746A82DDD7346444EA5515B32C2F1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E63746A82DDD7346444EA5515B32C2F1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_EFF87EA1122D8A8F92DCA5515B32F1FF" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E63746A82DDD7346444EA5515B32C2F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConvertiblePreferredStockMember" xlink:label="loc_us-gaap_ConvertiblePreferredStockMember_1590F50FA161AB76AD92A5515B32BBFB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_E63746A82DDD7346444EA5515B32C2F1" xlink:to="loc_us-gaap_ConvertiblePreferredStockMember_1590F50FA161AB76AD92A5515B32BBFB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_FFF52C1DF23A52651446A5515B338E1E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_51775A2807FDFDDFA2CCA5515B328317" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_FFF52C1DF23A52651446A5515B338E1E" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_AntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDuetoPerformanceConditionsNotMetAmount" xlink:label="loc_bdc_AntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDuetoPerformanceConditionsNotMetAmount_8EBDE2F15246C33B8A67A5515B33B365" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_51775A2807FDFDDFA2CCA5515B328317" xlink:to="loc_bdc_AntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDuetoPerformanceConditionsNotMetAmount_8EBDE2F15246C33B8A67A5515B33B365" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/IncomePerShareBasisForIncomePerShareComputationsDetail" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/IncomePerShareTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/IncomeTaxes" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/IncomeTaxesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_4F20D63EF084FA33513CA5515AFFF178" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_4F20D63EF084FA33513CA5515AFFF178" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_36CF00FB3614D3D4291DA5515AFF5310" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_4F20D63EF084FA33513CA5515AFFF178" xlink:to="loc_us-gaap_StatementGeographicalAxis_36CF00FB3614D3D4291DA5515AFF5310" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_793CB5EB87AEC53CFA93A5515AFF3D94_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_36CF00FB3614D3D4291DA5515AFF5310" xlink:to="loc_us-gaap_SegmentGeographicalDomain_793CB5EB87AEC53CFA93A5515AFF3D94_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_793CB5EB87AEC53CFA93A5515AFF3D94" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_36CF00FB3614D3D4291DA5515AFF5310" xlink:to="loc_us-gaap_SegmentGeographicalDomain_793CB5EB87AEC53CFA93A5515AFF3D94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_DE" xlink:label="loc_country_DE_81B5B87E61EA537B2D6FA5515AFF38F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_793CB5EB87AEC53CFA93A5515AFF3D94" xlink:to="loc_country_DE_81B5B87E61EA537B2D6FA5515AFF38F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_CA" xlink:label="loc_country_CA_99571A3F93164BB4AF0AA5515AFF9905" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_793CB5EB87AEC53CFA93A5515AFF3D94" xlink:to="loc_country_CA_99571A3F93164BB4AF0AA5515AFF9905" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_NL" xlink:label="loc_country_NL_EE0C3FF7542314AAEBDFA5515AFF7BE7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_793CB5EB87AEC53CFA93A5515AFF3D94" xlink:to="loc_country_NL_EE0C3FF7542314AAEBDFA5515AFF7BE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_09689CD3CFF8AEAF3452A5515AFF0E87" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_09689CD3CFF8AEAF3452A5515AFF0E87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_2B693AEE16872F502984A5515AFF8080" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_2B693AEE16872F502984A5515AFF8080" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsForeign" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsForeign_30C9146F9F68C8915C0EA5515AFF9E83" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsForeign_30C9146F9F68C8915C0EA5515AFF9E83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentForeignTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_A55431946EF7D00D0716A5515AFF7322" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_A55431946EF7D00D0716A5515AFF7322" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_497032DDCD86B798DED4A5515AFF8DF0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_497032DDCD86B798DED4A5515AFF8DF0" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_EffectiveIncomeTaxReconciliationTranslationAmount" xlink:label="loc_bdc_EffectiveIncomeTaxReconciliationTranslationAmount_FD64EBDB00B1A6CC8530A56BED35C4F1" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_bdc_EffectiveIncomeTaxReconciliationTranslationAmount_FD64EBDB00B1A6CC8530A56BED35C4F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_359ED7124E6A1586903DA581CCFA9895" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_359ED7124E6A1586903DA581CCFA9895" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_8CA6BBBA4B05344608F3A57934AF7E6F" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_8CA6BBBA4B05344608F3A57934AF7E6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease_5B8E66946C63108716A3A583CCA3C8F5" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_1252F97321C87C987D96A5515AFF7904" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease_5B8E66946C63108716A3A583CCA3C8F5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/Inventories" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/InventoriesMajorClassesOfInventoriesDetail" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/InventoriesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/LongLivedAssets" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/LongLivedAssetsAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_2B9385A6ED2BBC4A4365A5515B285823" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_D0AB826CF7583EAC118CA5515B2812D6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_2B9385A6ED2BBC4A4365A5515B285823" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_D0AB826CF7583EAC118CA5515B2812D6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5AFC51DD0C67132B6C7BA5515B2891C0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_D0AB826CF7583EAC118CA5515B2812D6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5AFC51DD0C67132B6C7BA5515B2891C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_ACB42E0C99A92587AF66A5515B28EEEA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5AFC51DD0C67132B6C7BA5515B2891C0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_ACB42E0C99A92587AF66A5515B28EEEA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_ACB42E0C99A92587AF66A5515B28EEEA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_5AFC51DD0C67132B6C7BA5515B2891C0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_ACB42E0C99A92587AF66A5515B28EEEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_B8CA7AEA7FCC165404C5A5515B28B7EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_ACB42E0C99A92587AF66A5515B28EEEA" xlink:to="loc_us-gaap_TrademarksMember_B8CA7AEA7FCC165404C5A5515B28B7EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_D25D66CC3131C50A6041A5515B285706" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_2B9385A6ED2BBC4A4365A5515B285823" xlink:to="loc_us-gaap_Depreciation_D25D66CC3131C50A6041A5515B285706" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_972D58B0A073FD8B3A7FA5515B2914F1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_2B9385A6ED2BBC4A4365A5515B285823" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_972D58B0A073FD8B3A7FA5515B2914F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_63C5F7002945BF85A17EA5515B291A1D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_2B9385A6ED2BBC4A4365A5515B285823" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_63C5F7002945BF85A17EA5515B291A1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_D877ABD06A34A2076886A5515B295676" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_2B9385A6ED2BBC4A4365A5515B285823" xlink:to="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_D877ABD06A34A2076886A5515B295676" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/LongTermDebtAndOtherBorrowingArrangements" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/LongTermDebtAndOtherBorrowingArrangementsAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_FA27713DC3D4BF14E932A5515B0A2351" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_DebtInstrumentTable_FA27713DC3D4BF14E932A5515B0A2351" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_7DBDD6C16E75E6534E8CA5515B0B552D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_FA27713DC3D4BF14E932A5515B0A2351" xlink:to="loc_us-gaap_RangeAxis_7DBDD6C16E75E6534E8CA5515B0B552D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_098EDA538405EE1BC55CA5515B0BADD2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_7DBDD6C16E75E6534E8CA5515B0B552D" xlink:to="loc_us-gaap_RangeMember_098EDA538405EE1BC55CA5515B0BADD2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_098EDA538405EE1BC55CA5515B0BADD2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_7DBDD6C16E75E6534E8CA5515B0B552D" xlink:to="loc_us-gaap_RangeMember_098EDA538405EE1BC55CA5515B0BADD2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_85350D384BA846F25283A5515B0BB68B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_098EDA538405EE1BC55CA5515B0BADD2" xlink:to="loc_us-gaap_MinimumMember_85350D384BA846F25283A5515B0BB68B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_10D76C32A0E9D97CA978A5515B0B63AA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_098EDA538405EE1BC55CA5515B0BADD2" xlink:to="loc_us-gaap_MaximumMember_10D76C32A0E9D97CA978A5515B0B63AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_73409734041C16F5F157A5515B0B84B8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_FA27713DC3D4BF14E932A5515B0A2351" xlink:to="loc_us-gaap_DebtInstrumentAxis_73409734041C16F5F157A5515B0B84B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_73409734041C16F5F157A5515B0B84B8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_73409734041C16F5F157A5515B0B84B8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_RevolvingCreditFacilityMatureTwoThousandTwentyTwoMember" xlink:label="loc_bdc_RevolvingCreditFacilityMatureTwoThousandTwentyTwoMember_982DA2BDBE8FE409E71CA5515B0BE1C2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3" xlink:to="loc_bdc_RevolvingCreditFacilityMatureTwoThousandTwentyTwoMember_982DA2BDBE8FE409E71CA5515B0BE1C2" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_A4.125SeniorSubordinatedNotesDue2026Member" xlink:label="loc_bdc_A4.125SeniorSubordinatedNotesDue2026Member_61E110B72F8235DF5D8FA5515B0B0F10" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3" xlink:to="loc_bdc_A4.125SeniorSubordinatedNotesDue2026Member_61E110B72F8235DF5D8FA5515B0B0F10" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_FivePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandTwentyFourMember" xlink:label="loc_bdc_FivePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandTwentyFourMember_73BB7082BF80E912B4B1A5515B0B2064" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3" xlink:to="loc_bdc_FivePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandTwentyFourMember_73BB7082BF80E912B4B1A5515B0B2064" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyThreeMember" xlink:label="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyThreeMember_C343311E60E0552AE7F6A5515B0B7531" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3" xlink:to="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyThreeMember_C343311E60E0552AE7F6A5515B0B7531" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyTwoMember" xlink:label="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyTwoMember_63498DF3A57AF54A4BFFA5515B0B5EC7" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3" xlink:to="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyTwoMember_63498DF3A57AF54A4BFFA5515B0B5EC7" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_NinePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandNineteenMember" xlink:label="loc_bdc_NinePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandNineteenMember_796017581168AF76A6D2A5515B0B261E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_67CAACCBFCB2E326B3A5A5515B0B05D3" xlink:to="loc_bdc_NinePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandNineteenMember_796017581168AF76A6D2A5515B0B261E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_C94A30F8967275BC39B9A5515B0BA649" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_FA27713DC3D4BF14E932A5515B0A2351" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_C94A30F8967275BC39B9A5515B0BA649" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_B88935F2A90D0D489629A5515B0B8325_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_C94A30F8967275BC39B9A5515B0BA649" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_B88935F2A90D0D489629A5515B0B8325_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_B88935F2A90D0D489629A5515B0B8325" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_C94A30F8967275BC39B9A5515B0BA649" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_B88935F2A90D0D489629A5515B0B8325" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SeniorSubordinatedNotesMember" xlink:label="loc_us-gaap_SeniorSubordinatedNotesMember_21F8F3D27321DE8D610BA5515B0B4B72" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_B88935F2A90D0D489629A5515B0B8325" xlink:to="loc_us-gaap_SeniorSubordinatedNotesMember_21F8F3D27321DE8D610BA5515B0B4B72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9C4B4C98C683AEDB01C1A5515B0BFE0F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_9C4B4C98C683AEDB01C1A5515B0BFE0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_D8CE617DD7BE05B89C67A5515B0C19C0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_D8CE617DD7BE05B89C67A5515B0C19C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_797EABFC815A712A8022A5515B0CD94C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_797EABFC815A712A8022A5515B0CD94C" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_SeniorSecuredCreditFacilityRestrictiveCovenantsFixedChargeCoverageRatioMinimumThreshold" xlink:label="loc_bdc_SeniorSecuredCreditFacilityRestrictiveCovenantsFixedChargeCoverageRatioMinimumThreshold_0F00881886232717E935A5515B0C767A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_bdc_SeniorSecuredCreditFacilityRestrictiveCovenantsFixedChargeCoverageRatioMinimumThreshold_0F00881886232717E935A5515B0C767A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_4C60FF9ABC9614F8AB4DA5515B0CDD8E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_LineOfCredit_4C60FF9ABC9614F8AB4DA5515B0CDD8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFeeAmount" xlink:label="loc_us-gaap_DebtInstrumentFeeAmount_7E696AF71147B64ABB7BA5515B0CCEAF" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_DebtInstrumentFeeAmount_7E696AF71147B64ABB7BA5515B0CCEAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_DE04E754906EDB77070EA5515B0CF546" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_DE04E754906EDB77070EA5515B0CF546" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_5EAD85A4EB71C3ADE3F3A5515B0CCB6F" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_5EAD85A4EB71C3ADE3F3A5515B0CCB6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_649C68E7C7F16DA107AAA5515B0C07CB" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_649C68E7C7F16DA107AAA5515B0C07CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_173AF7DB8FDF09283FD0A5515B0CD9C4" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_173AF7DB8FDF09283FD0A5515B0CD9C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubordinatedLongTermDebt" xlink:label="loc_us-gaap_SubordinatedLongTermDebt_10BBABB830D97517EB9AA5515B0C2F11" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_SubordinatedLongTermDebt_10BBABB830D97517EB9AA5515B0C2F11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="loc_us-gaap_RepaymentsOfDebt_F11762AE484AD4C1BC4CA5515B0CEED7" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_RepaymentsOfDebt_F11762AE484AD4C1BC4CA5515B0CEED7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="loc_us-gaap_DebtInstrumentFairValue_C4D27461792317BD0664A5515B0C5A10" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12D9D8BC7C3EF76BC360A5515B0BEBC4" xlink:to="loc_us-gaap_DebtInstrumentFairValue_C4D27461792317BD0664A5515B0C5A10" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/LongTermDebtAndOtherBorrowingArrangementsCarryingValuesOfLongTermDebtAndOtherBorrowingArrangementsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_3D539FCACBCA553882AEA5515B112BC2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_3D3CB1A183B2959FEEB3A5515B10F98D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3D539FCACBCA553882AEA5515B112BC2" xlink:to="loc_us-gaap_DebtInstrumentTable_3D3CB1A183B2959FEEB3A5515B10F98D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_B16B502C37283628A02DA5515B10A430" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_3D3CB1A183B2959FEEB3A5515B10F98D" xlink:to="loc_us-gaap_DebtInstrumentAxis_B16B502C37283628A02DA5515B10A430" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_B16B502C37283628A02DA5515B10A430" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_B16B502C37283628A02DA5515B10A430" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_RevolvingCreditFacilityMatureTwoThousandTwentyTwoMember" xlink:label="loc_bdc_RevolvingCreditFacilityMatureTwoThousandTwentyTwoMember_549219C5DC708ABEEDF8A5515B109458" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9" xlink:to="loc_bdc_RevolvingCreditFacilityMatureTwoThousandTwentyTwoMember_549219C5DC708ABEEDF8A5515B109458" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_A4.125SeniorSubordinatedNotesDue2026Member" xlink:label="loc_bdc_A4.125SeniorSubordinatedNotesDue2026Member_7AC8AFCE46E82856352CA5515B1186C3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9" xlink:to="loc_bdc_A4.125SeniorSubordinatedNotesDue2026Member_7AC8AFCE46E82856352CA5515B1186C3" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_FivePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandTwentyFourMember" xlink:label="loc_bdc_FivePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandTwentyFourMember_02BE3896AAFE540C7D4CA5515B119A9A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9" xlink:to="loc_bdc_FivePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandTwentyFourMember_02BE3896AAFE540C7D4CA5515B119A9A" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyThreeMember" xlink:label="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyThreeMember_118F3D8BA6CCFD8A39BDA5515B11A5C1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9" xlink:to="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyThreeMember_118F3D8BA6CCFD8A39BDA5515B11A5C1" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyTwoMember" xlink:label="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyTwoMember_97D023E910530EED023FA5515B115905" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9" xlink:to="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyTwoMember_97D023E910530EED023FA5515B115905" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_NinePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandNineteenMember" xlink:label="loc_bdc_NinePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandNineteenMember_FBBEE4BA2EC069A6A5D7A5515B11082E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8C6683BEBB107DA1E5E8A5515B103AB9" xlink:to="loc_bdc_NinePointTwoFivePercentSeniorSubordinatedNotesDueTwoThousandNineteenMember_FBBEE4BA2EC069A6A5D7A5515B11082E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_5EB2225EE684535F045DA5515B11E6F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3D539FCACBCA553882AEA5515B112BC2" xlink:to="loc_us-gaap_LineOfCredit_5EB2225EE684535F045DA5515B11E6F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubordinatedLongTermDebt" xlink:label="loc_us-gaap_SubordinatedLongTermDebt_993A650B703E97A5F9ABA5515B1175AE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3D539FCACBCA553882AEA5515B112BC2" xlink:to="loc_us-gaap_SubordinatedLongTermDebt_993A650B703E97A5F9ABA5515B1175AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_649F4303251394F8B582A5515B111A48" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3D539FCACBCA553882AEA5515B112BC2" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_649F4303251394F8B582A5515B111A48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_19CCBFBFBE4876F45A29A5515B11B875" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3D539FCACBCA553882AEA5515B112BC2" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_19CCBFBFBE4876F45A29A5515B11B875" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_70BF39EF06C8BBC67148A5515B1140CE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3D539FCACBCA553882AEA5515B112BC2" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_70BF39EF06C8BBC67148A5515B1140CE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/LongTermDebtAndOtherBorrowingArrangementsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/NetInvestmentHedge" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/NetInvestmentHedgeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_55BE095C879F319C6E41A5515B04DADF" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_66CDB8ED670C5F243A47A5515B03379F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_55BE095C879F319C6E41A5515B04DADF" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_66CDB8ED670C5F243A47A5515B03379F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_5A7680CB39FD3F7AC885A5515B03DB0F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_66CDB8ED670C5F243A47A5515B03379F" xlink:to="loc_us-gaap_DebtInstrumentAxis_5A7680CB39FD3F7AC885A5515B03DB0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_AB059F241A392CDE93B3A5515B03FF3D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_5A7680CB39FD3F7AC885A5515B03DB0F" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_AB059F241A392CDE93B3A5515B03FF3D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_AB059F241A392CDE93B3A5515B03FF3D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_5A7680CB39FD3F7AC885A5515B03DB0F" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_AB059F241A392CDE93B3A5515B03FF3D" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_A4.125SeniorSubordinatedNotesDue2026Member" xlink:label="loc_bdc_A4.125SeniorSubordinatedNotesDue2026Member_20B4A1BE586713C1E5A2A5515B047255" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_AB059F241A392CDE93B3A5515B03FF3D" xlink:to="loc_bdc_A4.125SeniorSubordinatedNotesDue2026Member_20B4A1BE586713C1E5A2A5515B047255" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_A02D72B49D370D7BAEDBA5515B043087" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_66CDB8ED670C5F243A47A5515B03379F" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_A02D72B49D370D7BAEDBA5515B043087" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_D9809CB979B1095765FAA5515B040F19_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_A02D72B49D370D7BAEDBA5515B043087" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_D9809CB979B1095765FAA5515B040F19_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_D9809CB979B1095765FAA5515B040F19" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_A02D72B49D370D7BAEDBA5515B043087" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_D9809CB979B1095765FAA5515B040F19" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_SeniorSubordinateNotesMember" xlink:label="loc_bdc_SeniorSubordinateNotesMember_D3A39F3124217F8D196DA5515B04D013" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_D9809CB979B1095765FAA5515B040F19" xlink:to="loc_bdc_SeniorSubordinateNotesMember_D3A39F3124217F8D196DA5515B04D013" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_CFC217243F9A33C63DE1A5515B04932C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_55BE095C879F319C6E41A5515B04DADF" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_CFC217243F9A33C63DE1A5515B04932C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_C3BE21D29B3DFF879051A5515B04C7F5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_55BE095C879F319C6E41A5515B04DADF" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax_C3BE21D29B3DFF879051A5515B04C7F5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/OperatingSegments" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/OperatingSegmentsAdditionalInformationDetail" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/OperatingSegmentsOperatingSegmentInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_53E9BC240E04458B9426A5515B428FAD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_53E9BC240E04458B9426A5515B428FAD" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="loc_us-gaap_ConsolidationItemsAxis_0D8459F0DACE3DE68D56A5515B4223B8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_53E9BC240E04458B9426A5515B428FAD" xlink:to="loc_us-gaap_ConsolidationItemsAxis_0D8459F0DACE3DE68D56A5515B4223B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_858701AEA3805D2C0A0AA5515B4212D4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidationItemsAxis_0D8459F0DACE3DE68D56A5515B4223B8" xlink:to="loc_us-gaap_ConsolidationItemsDomain_858701AEA3805D2C0A0AA5515B4212D4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_858701AEA3805D2C0A0AA5515B4212D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidationItemsAxis_0D8459F0DACE3DE68D56A5515B4223B8" xlink:to="loc_us-gaap_ConsolidationItemsDomain_858701AEA3805D2C0A0AA5515B4212D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_0107DAA1EED294B382ADA5515B42C340" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_858701AEA3805D2C0A0AA5515B4212D4" xlink:to="loc_us-gaap_OperatingSegmentsMember_0107DAA1EED294B382ADA5515B42C340" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="loc_us-gaap_IntersegmentEliminationMember_4BFC18BA502EDCD5D0F4A5515B426FCB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_858701AEA3805D2C0A0AA5515B4212D4" xlink:to="loc_us-gaap_IntersegmentEliminationMember_4BFC18BA502EDCD5D0F4A5515B426FCB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_7C4BF79852B732C649DAA5515B426D33" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_53E9BC240E04458B9426A5515B428FAD" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_7C4BF79852B732C649DAA5515B426D33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_FDE845E037FDCF2A7254A5515B42D055_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7C4BF79852B732C649DAA5515B426D33" xlink:to="loc_us-gaap_SegmentDomain_FDE845E037FDCF2A7254A5515B42D055_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_FDE845E037FDCF2A7254A5515B42D055" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7C4BF79852B732C649DAA5515B426D33" xlink:to="loc_us-gaap_SegmentDomain_FDE845E037FDCF2A7254A5515B42D055" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_BroadcastSolutionsMember" xlink:label="loc_bdc_BroadcastSolutionsMember_C050A6D558E46CBC4BE9A5515B42C968" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_FDE845E037FDCF2A7254A5515B42D055" xlink:to="loc_bdc_BroadcastSolutionsMember_C050A6D558E46CBC4BE9A5515B42C968" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_EnterpriseSolutionsMember" xlink:label="loc_bdc_EnterpriseSolutionsMember_A7764E6308DA62F712E5A5515B4296F1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_FDE845E037FDCF2A7254A5515B42D055" xlink:to="loc_bdc_EnterpriseSolutionsMember_A7764E6308DA62F712E5A5515B4296F1" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_IndustrialSolutionsMember" xlink:label="loc_bdc_IndustrialSolutionsMember_812551C19F8590EC3A40A5515B42BD5E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_FDE845E037FDCF2A7254A5515B42D055" xlink:to="loc_bdc_IndustrialSolutionsMember_812551C19F8590EC3A40A5515B42BD5E" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_NetworkSolutionsMember" xlink:label="loc_bdc_NetworkSolutionsMember_F6C839BCE863CFFE716CA5515B42C2CD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_FDE845E037FDCF2A7254A5515B42D055" xlink:to="loc_bdc_NetworkSolutionsMember_F6C839BCE863CFFE716CA5515B42C2CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueGoodsGross" xlink:label="loc_us-gaap_SalesRevenueGoodsGross_5E09ABD3D39F73C17434A5515B429E38" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_us-gaap_SalesRevenueGoodsGross_5E09ABD3D39F73C17434A5515B429E38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_FC8A6DF6E20B69B431CEA5515B42293D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_us-gaap_Revenues_FC8A6DF6E20B69B431CEA5515B42293D" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization" xlink:label="loc_bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization_131827DCA24CD599362AA5515B43D1B1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization_131827DCA24CD599362AA5515B43D1B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_F913E0C2DF6B2BEC0122A5515B439F88" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_us-gaap_Depreciation_F913E0C2DF6B2BEC0122A5515B439F88" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_D3DA7F9B0E4AFD6BB9ECA5515B4333CF" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_D3DA7F9B0E4AFD6BB9ECA5515B4333CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_D768A54DF75EF91E5BFBA5515B43F4B4" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_us-gaap_RestructuringCharges_D768A54DF75EF91E5BFBA5515B43F4B4" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_PurchaseAccountingEffectsAcquisitions" xlink:label="loc_bdc_PurchaseAccountingEffectsAcquisitions_FC051D26B47FCCC95FAFA5515B43437F" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_bdc_PurchaseAccountingEffectsAcquisitions_FC051D26B47FCCC95FAFA5515B43437F" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_DeferredGrossProfitAdjustments" xlink:label="loc_bdc_DeferredGrossProfitAdjustments_AE076C27D6E2F162B60DA5515B434E47" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_bdc_DeferredGrossProfitAdjustments_AE076C27D6E2F162B60DA5515B434E47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_BA94FF62B3A03433F9E3A5515B4383D3" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_675A634E891942DB14D9A5515B42D169" xlink:to="loc_us-gaap_Assets_BA94FF62B3A03433F9E3A5515B4383D3" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/OperatingSegmentsReconciliationOfTotalReportableSegmentsRevenuesAndEbitdaToConsolidatedRevenuesAndConsolidatedIncomeFromContinuingOperationsBeforeTaxesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems" xlink:label="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable" xlink:label="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_ED7AFA6FD5A45AE58F5EA5515B3CD6D1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_ED7AFA6FD5A45AE58F5EA5515B3CD6D1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsAxis" xlink:label="loc_us-gaap_ConsolidationItemsAxis_48D332E5252AAABF413CA5515B3D8A3D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedTable_ED7AFA6FD5A45AE58F5EA5515B3CD6D1" xlink:to="loc_us-gaap_ConsolidationItemsAxis_48D332E5252AAABF413CA5515B3D8A3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_F98E096D3DC3DD3CCDE9A5515B3D4173_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidationItemsAxis_48D332E5252AAABF413CA5515B3D8A3D" xlink:to="loc_us-gaap_ConsolidationItemsDomain_F98E096D3DC3DD3CCDE9A5515B3D4173_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidationItemsDomain" xlink:label="loc_us-gaap_ConsolidationItemsDomain_F98E096D3DC3DD3CCDE9A5515B3D4173" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidationItemsAxis_48D332E5252AAABF413CA5515B3D8A3D" xlink:to="loc_us-gaap_ConsolidationItemsDomain_F98E096D3DC3DD3CCDE9A5515B3D4173" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingSegmentsMember" xlink:label="loc_us-gaap_OperatingSegmentsMember_3A47D4FC893A4E9D48F4A5515B3D3703" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_F98E096D3DC3DD3CCDE9A5515B3D4173" xlink:to="loc_us-gaap_OperatingSegmentsMember_3A47D4FC893A4E9D48F4A5515B3D3703" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntersegmentEliminationMember" xlink:label="loc_us-gaap_IntersegmentEliminationMember_E990E343C45CC64E42BCA5515B3D1AD8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationItemsDomain_F98E096D3DC3DD3CCDE9A5515B3D4173" xlink:to="loc_us-gaap_IntersegmentEliminationMember_E990E343C45CC64E42BCA5515B3D1AD8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueGoodsGross" xlink:label="loc_us-gaap_SalesRevenueGoodsGross_0E13204ACF506CF18284A5515B3D8A97" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_SalesRevenueGoodsGross_0E13204ACF506CF18284A5515B3D8A97" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_DeferredRevenueAdjustments" xlink:label="loc_bdc_DeferredRevenueAdjustments_C2EF5A313CFC280B8001A5515B3D3B7D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_bdc_DeferredRevenueAdjustments_C2EF5A313CFC280B8001A5515B3D3B7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueGoodsNet" xlink:label="loc_us-gaap_SalesRevenueGoodsNet_05C4D65345AE75BDB6FAA5515B3D986E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_SalesRevenueGoodsNet_05C4D65345AE75BDB6FAA5515B3D986E" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization" xlink:label="loc_bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization_95244678D4A5DE06FDDDA5515B3DC619" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_bdc_EarningsBeforeInterestTaxesDepreciationAndAmortization_95244678D4A5DE06FDDDA5515B3DC619" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_782CAB15C9DA891A8174A5515B3D8735" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_782CAB15C9DA891A8174A5515B3D8735" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaap_Depreciation_12C3A88A8D83D98F99F9A5515B3D8D26" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_Depreciation_12C3A88A8D83D98F99F9A5515B3D8D26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_3A2137B494295CB6F735A5515B3DEB22" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_RestructuringCharges_3A2137B494295CB6F735A5515B3DEB22" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_PurchaseAccountingEffectsAcquisitions" xlink:label="loc_bdc_PurchaseAccountingEffectsAcquisitions_D92AE1A98A5C63BFDF65A5515B3D7F3E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_bdc_PurchaseAccountingEffectsAcquisitions_D92AE1A98A5C63BFDF65A5515B3D7F3E" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_DeferredGrossProfitAdjustments" xlink:label="loc_bdc_DeferredGrossProfitAdjustments_FE3FE6C634C0E75356D7A5515B3D2A55" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_bdc_DeferredGrossProfitAdjustments_FE3FE6C634C0E75356D7A5515B3D2A55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_77AD1A11C0B03F4C8459A5515B3DE095" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_77AD1A11C0B03F4C8459A5515B3DE095" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_EF9D623F77379DC7E3B0A5515B3D7976" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_OperatingIncomeLoss_EF9D623F77379DC7E3B0A5515B3D7976" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestIncomeExpenseNet" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_3BE93FC081D8E0239C8EA5515B3DA5AB" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_3BE93FC081D8E0239C8EA5515B3DA5AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_88A86DC5ED46EEAF6B98A5515B3EEFC1" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_88A86DC5ED46EEAF6B98A5515B3EEFC1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_C0EB0F8A6EF96F84A392A5515B3E2E49" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingReconcilingItemForOperatingProfitLossFromSegmentToConsolidatedLineItems_3AFCB04224A55207A670A5515B3D776C" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_C0EB0F8A6EF96F84A392A5515B3E2E49" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/OperatingSegmentsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/PensionAndOtherPostretirementObligations" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/PensionAndOtherPostretirementObligationsComponentsOfNetPeriodicBenefitCostsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7F96E46FA1237DF1AE5CA5515AC342D6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_35CA47026A6935E6434DA5515AC27F69" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7F96E46FA1237DF1AE5CA5515AC342D6" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_35CA47026A6935E6434DA5515AC27F69" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_CE4ED4B6402B5962ABF2A5515AC2916C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_35CA47026A6935E6434DA5515AC27F69" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_CE4ED4B6402B5962ABF2A5515AC2916C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_FB051F4D040286F467DFA5515AC29A5C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_CE4ED4B6402B5962ABF2A5515AC2916C" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_FB051F4D040286F467DFA5515AC29A5C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_FB051F4D040286F467DFA5515AC29A5C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_CE4ED4B6402B5962ABF2A5515AC2916C" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_FB051F4D040286F467DFA5515AC29A5C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_E0532EE944D62E77BF54A5515AC3FA63" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_FB051F4D040286F467DFA5515AC29A5C" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_E0532EE944D62E77BF54A5515AC3FA63" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_40251D338A97C9E68081A5515AC3E91B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_FB051F4D040286F467DFA5515AC29A5C" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_40251D338A97C9E68081A5515AC3E91B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_36E63EC3CA04C9062DA9A5515AC3BE3C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7F96E46FA1237DF1AE5CA5515AC342D6" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_36E63EC3CA04C9062DA9A5515AC3BE3C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_1C1A8C5DA0868AF9BB6EA5515AC3AF7D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7F96E46FA1237DF1AE5CA5515AC342D6" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_1C1A8C5DA0868AF9BB6EA5515AC3AF7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_803BA334A92E4390B83BA5515AC341CD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7F96E46FA1237DF1AE5CA5515AC342D6" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_803BA334A92E4390B83BA5515AC341CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_690501F8C16926E6C03EA5515AC32195" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7F96E46FA1237DF1AE5CA5515AC342D6" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_690501F8C16926E6C03EA5515AC32195" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_E7D12B809C348913EA33A5515AC34341" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7F96E46FA1237DF1AE5CA5515AC342D6" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_E7D12B809C348913EA33A5515AC34341" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_87B9C4A75958562AC304A5515AC37C7D" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7F96E46FA1237DF1AE5CA5515AC342D6" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_87B9C4A75958562AC304A5515AC37C7D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/PensionAndOtherPostretirementObligationsTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/PreferredStock" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/PreferredStockDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockLineItems" xlink:label="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_641D314A84E12E0669FEA5515AA89FD5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_641D314A84E12E0669FEA5515AA89FD5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_0BE7617205F1D0D008C4A5515AA87A0E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_641D314A84E12E0669FEA5515AA89FD5" xlink:to="loc_us-gaap_StatementScenarioAxis_0BE7617205F1D0D008C4A5515AA87A0E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_FB964841A9CB4491FBC6A5515AA96420_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_0BE7617205F1D0D008C4A5515AA87A0E" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_FB964841A9CB4491FBC6A5515AA96420_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_FB964841A9CB4491FBC6A5515AA96420" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_0BE7617205F1D0D008C4A5515AA87A0E" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_FB964841A9CB4491FBC6A5515AA96420" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_74B0F14541D319D256F4A5515AA90879" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_FB964841A9CB4491FBC6A5515AA96420" xlink:to="loc_us-gaap_ScenarioForecastMember_74B0F14541D319D256F4A5515AA90879" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_39A6CF498CBC4BCA6F94A5515AA91698" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_641D314A84E12E0669FEA5515AA89FD5" xlink:to="loc_us-gaap_RangeAxis_39A6CF498CBC4BCA6F94A5515AA91698" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_F31CBF1BD66D38C55470A5515AA97D71_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_39A6CF498CBC4BCA6F94A5515AA91698" xlink:to="loc_us-gaap_RangeMember_F31CBF1BD66D38C55470A5515AA97D71_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_F31CBF1BD66D38C55470A5515AA97D71" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_39A6CF498CBC4BCA6F94A5515AA91698" xlink:to="loc_us-gaap_RangeMember_F31CBF1BD66D38C55470A5515AA97D71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_3B37FCBCF83916BD8476A5515AA99B04" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_F31CBF1BD66D38C55470A5515AA97D71" xlink:to="loc_us-gaap_MinimumMember_3B37FCBCF83916BD8476A5515AA99B04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_49D4E496E6FF77ADE13EA5515AA9D6B1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_F31CBF1BD66D38C55470A5515AA97D71" xlink:to="loc_us-gaap_MaximumMember_49D4E496E6FF77ADE13EA5515AA9D6B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="loc_us-gaap_StatementClassOfStockAxis_A682994C640059E74B52A5515AA99DAA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_641D314A84E12E0669FEA5515AA89FD5" xlink:to="loc_us-gaap_StatementClassOfStockAxis_A682994C640059E74B52A5515AA99DAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_3B88CD6FA30AB2E27031A5515AA9FEF1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_A682994C640059E74B52A5515AA99DAA" xlink:to="loc_us-gaap_ClassOfStockDomain_3B88CD6FA30AB2E27031A5515AA9FEF1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="loc_us-gaap_ClassOfStockDomain_3B88CD6FA30AB2E27031A5515AA9FEF1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_A682994C640059E74B52A5515AA99DAA" xlink:to="loc_us-gaap_ClassOfStockDomain_3B88CD6FA30AB2E27031A5515AA9FEF1" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_DepositorySharesMember" xlink:label="loc_bdc_DepositorySharesMember_1C4CE6DED1C4637D76FFA5515AA911E7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3B88CD6FA30AB2E27031A5515AA9FEF1" xlink:to="loc_bdc_DepositorySharesMember_1C4CE6DED1C4637D76FFA5515AA911E7" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_SixPointSevenFivePercentageSeriesBMandatoryConvertiblePreferredStockMember" xlink:label="loc_bdc_SixPointSevenFivePercentageSeriesBMandatoryConvertiblePreferredStockMember_216C05581D592267981CA5515AA9300C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3B88CD6FA30AB2E27031A5515AA9FEF1" xlink:to="loc_bdc_SixPointSevenFivePercentageSeriesBMandatoryConvertiblePreferredStockMember_216C05581D592267981CA5515AA9300C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_E19BA001503F53BD5808A5515AA96ADC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_us-gaap_PreferredStockSharesIssued_E19BA001503F53BD5808A5515AA96ADC" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_PreferredStockOwnershipInterest" xlink:label="loc_bdc_PreferredStockOwnershipInterest_81E7E2C8A30458C4EE7AA5515AA9502E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_bdc_PreferredStockOwnershipInterest_81E7E2C8A30458C4EE7AA5515AA9502E" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_PreferredStockSharesIssuedPercentage" xlink:label="loc_bdc_PreferredStockSharesIssuedPercentage_7AECA5984F98D98D16A0A5515AA93C06" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_bdc_PreferredStockSharesIssuedPercentage_7AECA5984F98D98D16A0A5515AA93C06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SaleOfStockPricePerShare" xlink:label="loc_us-gaap_SaleOfStockPricePerShare_F3F273DB7599D951F2D4A5515AA9D531" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_us-gaap_SaleOfStockPricePerShare_F3F273DB7599D951F2D4A5515AA9D531" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_PreferredStockConvertedInToCommonStock" xlink:label="loc_bdc_PreferredStockConvertedInToCommonStock_41249458BDCC58ED98FDA5515AAAE93E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_bdc_PreferredStockConvertedInToCommonStock_41249458BDCC58ED98FDA5515AAAE93E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion" xlink:label="loc_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_66199D9A765DBAD29607A5515AAA3B7A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_66199D9A765DBAD29607A5515AAA3B7A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_36C15DD3604247EB6E70A5515AAA970A" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_36C15DD3604247EB6E70A5515AAA970A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceInitialPublicOffering" xlink:label="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_80E516AE3F594AD942BFA5515AAAEEA4" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_us-gaap_ProceedsFromIssuanceInitialPublicOffering_80E516AE3F594AD942BFA5515AAAEEA4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockDividendsIncomeStatementImpact" xlink:label="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact_C3E04273AB6970D4EF77A5515AAA3361" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_FE37DB46D92BEF7A6BBAA5515AA93C43" xlink:to="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact_C3E04273AB6970D4EF77A5515AAA3361" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/SeveranceRestructuringAndAcquisitionIntegrationActivities" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/SeveranceRestructuringAndAcquisitionIntegrationActivitiesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_BE42DFA31CDF516DD64FA5515B22D7C3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2CB121BA1A0B759EF089A5515B21A8C6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_BE42DFA31CDF516DD64FA5515B22D7C3" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2CB121BA1A0B759EF089A5515B21A8C6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_23FDB97E3C98042B85EBA5515B215D55" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2CB121BA1A0B759EF089A5515B21A8C6" xlink:to="loc_us-gaap_RangeAxis_23FDB97E3C98042B85EBA5515B215D55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_D19F5773AAC4398CFA9BA5515B21D589_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_23FDB97E3C98042B85EBA5515B215D55" xlink:to="loc_us-gaap_RangeMember_D19F5773AAC4398CFA9BA5515B21D589_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_D19F5773AAC4398CFA9BA5515B21D589" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_23FDB97E3C98042B85EBA5515B215D55" xlink:to="loc_us-gaap_RangeMember_D19F5773AAC4398CFA9BA5515B21D589" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_F0B3FDF5FFE157C673DEA5515B21238F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_D19F5773AAC4398CFA9BA5515B21D589" xlink:to="loc_us-gaap_MaximumMember_F0B3FDF5FFE157C673DEA5515B21238F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_637496DFCE329B31D29CA5515B212BF9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2CB121BA1A0B759EF089A5515B21A8C6" xlink:to="loc_us-gaap_StatementScenarioAxis_637496DFCE329B31D29CA5515B212BF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_62D7F52D3AE3B0376789A5515B21D958_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_637496DFCE329B31D29CA5515B212BF9" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_62D7F52D3AE3B0376789A5515B21D958_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_62D7F52D3AE3B0376789A5515B21D958" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_637496DFCE329B31D29CA5515B212BF9" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_62D7F52D3AE3B0376789A5515B21D958" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_C4ADD417E4B9CC173497A5515B21FA28" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_62D7F52D3AE3B0376789A5515B21D958" xlink:to="loc_us-gaap_ScenarioForecastMember_C4ADD417E4B9CC173497A5515B21FA28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringPlanAxis" xlink:label="loc_us-gaap_RestructuringPlanAxis_D35414C075B1D0443CBDA5515B225B14" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2CB121BA1A0B759EF089A5515B21A8C6" xlink:to="loc_us-gaap_RestructuringPlanAxis_D35414C075B1D0443CBDA5515B225B14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringPlanDomain" xlink:label="loc_us-gaap_RestructuringPlanDomain_9D5021C3150FD0EBA85EA5515B22C768_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_D35414C075B1D0443CBDA5515B225B14" xlink:to="loc_us-gaap_RestructuringPlanDomain_9D5021C3150FD0EBA85EA5515B22C768_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringPlanDomain" xlink:label="loc_us-gaap_RestructuringPlanDomain_9D5021C3150FD0EBA85EA5515B22C768" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_D35414C075B1D0443CBDA5515B225B14" xlink:to="loc_us-gaap_RestructuringPlanDomain_9D5021C3150FD0EBA85EA5515B22C768" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_IndustrialRestructuringProgramMember" xlink:label="loc_bdc_IndustrialRestructuringProgramMember_9D5A94C2683714666423A5515B22B62B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_9D5021C3150FD0EBA85EA5515B22C768" xlink:to="loc_bdc_IndustrialRestructuringProgramMember_9D5A94C2683714666423A5515B22B62B" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_IndustrialManufacturingFootprintProgramMember" xlink:label="loc_bdc_IndustrialManufacturingFootprintProgramMember_9177818BB1DF16E37CC8A5515B22DB39" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_9D5021C3150FD0EBA85EA5515B22C768" xlink:to="loc_bdc_IndustrialManufacturingFootprintProgramMember_9177818BB1DF16E37CC8A5515B22DB39" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_GrassValleyRestructuringProgramMember" xlink:label="loc_bdc_GrassValleyRestructuringProgramMember_9C6484C4EA390F6DCCC8A5515B22CE29" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_9D5021C3150FD0EBA85EA5515B22C768" xlink:to="loc_bdc_GrassValleyRestructuringProgramMember_9C6484C4EA390F6DCCC8A5515B22CE29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_CB018DCC6AFF4DB0DF75A5515B2268E0" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2CB121BA1A0B759EF089A5515B21A8C6" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_CB018DCC6AFF4DB0DF75A5515B2268E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_B3C0A707ABBAC8AD2C70A5515B228B4D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_CB018DCC6AFF4DB0DF75A5515B2268E0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_B3C0A707ABBAC8AD2C70A5515B228B4D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_B3C0A707ABBAC8AD2C70A5515B228B4D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_CB018DCC6AFF4DB0DF75A5515B2268E0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_B3C0A707ABBAC8AD2C70A5515B228B4D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_52E9A85BD8BFF2861194A5515B220F7C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_B3C0A707ABBAC8AD2C70A5515B228B4D" xlink:to="loc_us-gaap_CostOfSalesMember_52E9A85BD8BFF2861194A5515B220F7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_EE6CDC87408B3FF8947BA5515B22F414" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_B3C0A707ABBAC8AD2C70A5515B228B4D" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_EE6CDC87408B3FF8947BA5515B22F414" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_DF667DDC84182C78E439A5515B22A14F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_B3C0A707ABBAC8AD2C70A5515B228B4D" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_DF667DDC84182C78E439A5515B22A14F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_135EF1E373EBF3ED766BA5515B22BF7F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_BE42DFA31CDF516DD64FA5515B22D7C3" xlink:to="loc_us-gaap_RestructuringCharges_135EF1E373EBF3ED766BA5515B22BF7F" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_ExpectedSavingsFromRestructuring" xlink:label="loc_bdc_ExpectedSavingsFromRestructuring_654254B964627D55425CA5515B2219D8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_BE42DFA31CDF516DD64FA5515B22D7C3" xlink:to="loc_bdc_ExpectedSavingsFromRestructuring_654254B964627D55425CA5515B2219D8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_13ED6C1A183909378547A5515B221A28" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_BE42DFA31CDF516DD64FA5515B22D7C3" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1_13ED6C1A183909378547A5515B221A28" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_SavingsFromRestructuring" xlink:label="loc_bdc_SavingsFromRestructuring_21BCCE145F0F0EB9C4AAA5515B22E403" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_BE42DFA31CDF516DD64FA5515B22D7C3" xlink:to="loc_bdc_SavingsFromRestructuring_21BCCE145F0F0EB9C4AAA5515B22E403" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_RestructuringAndIntegrationCostPayablePeriod" xlink:label="loc_bdc_RestructuringAndIntegrationCostPayablePeriod_116A030341ABCA7161CDA5515B22D682" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_BE42DFA31CDF516DD64FA5515B22D7C3" xlink:to="loc_bdc_RestructuringAndIntegrationCostPayablePeriod_116A030341ABCA7161CDA5515B22D682" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/SeveranceRestructuringAndAcquisitionIntegrationActivitiesSeveranceRestructuringAndIntegrationCostsBySegmentDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_465F2A22AF76F0900801A5515B1DD0C2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_F4B622C3F77156EFC2DFA5515B1C5AD7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_465F2A22AF76F0900801A5515B1DD0C2" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_F4B622C3F77156EFC2DFA5515B1C5AD7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_65ED7FB9D722BF9918C1A5515B1C10A5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_F4B622C3F77156EFC2DFA5515B1C5AD7" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_65ED7FB9D722BF9918C1A5515B1C10A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_4427FC10C1BE496E9CE5A5515B1CA188_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_65ED7FB9D722BF9918C1A5515B1C10A5" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_4427FC10C1BE496E9CE5A5515B1CA188_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfRestructuringDomain" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_4427FC10C1BE496E9CE5A5515B1CA188" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_65ED7FB9D722BF9918C1A5515B1C10A5" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_4427FC10C1BE496E9CE5A5515B1CA188" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeSeveranceMember" xlink:label="loc_us-gaap_EmployeeSeveranceMember_72E079B69763702F7D41A5515B1C62A6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_4427FC10C1BE496E9CE5A5515B1CA188" xlink:to="loc_us-gaap_EmployeeSeveranceMember_72E079B69763702F7D41A5515B1C62A6" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_OtherThanSeveranceCostsRestructuringAndIntegrationCostsMember" xlink:label="loc_bdc_OtherThanSeveranceCostsRestructuringAndIntegrationCostsMember_93B7297404D1C066A79AA5515B1C55A9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_4427FC10C1BE496E9CE5A5515B1CA188" xlink:to="loc_bdc_OtherThanSeveranceCostsRestructuringAndIntegrationCostsMember_93B7297404D1C066A79AA5515B1C55A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_0BE57367CE1B4D75F332A5515B1CCCA1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_F4B622C3F77156EFC2DFA5515B1C5AD7" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_0BE57367CE1B4D75F332A5515B1CCCA1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_41BD0E60A762E062E3F3A5515B1C2FB5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_0BE57367CE1B4D75F332A5515B1CCCA1" xlink:to="loc_us-gaap_SegmentDomain_41BD0E60A762E062E3F3A5515B1C2FB5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_41BD0E60A762E062E3F3A5515B1C2FB5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_0BE57367CE1B4D75F332A5515B1CCCA1" xlink:to="loc_us-gaap_SegmentDomain_41BD0E60A762E062E3F3A5515B1C2FB5" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_BroadcastSolutionsMember" xlink:label="loc_bdc_BroadcastSolutionsMember_BBA67ED5A5A5D80B36DBA5515B1C7EC1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_41BD0E60A762E062E3F3A5515B1C2FB5" xlink:to="loc_bdc_BroadcastSolutionsMember_BBA67ED5A5A5D80B36DBA5515B1C7EC1" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_EnterpriseSolutionsMember" xlink:label="loc_bdc_EnterpriseSolutionsMember_355CD7CE5360BCFC0DA0A5515B1CDE7D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_41BD0E60A762E062E3F3A5515B1C2FB5" xlink:to="loc_bdc_EnterpriseSolutionsMember_355CD7CE5360BCFC0DA0A5515B1CDE7D" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_IndustrialSolutionsMember" xlink:label="loc_bdc_IndustrialSolutionsMember_EBBA2BAAAB475765CA6DA5515B1C7847" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_41BD0E60A762E062E3F3A5515B1C2FB5" xlink:to="loc_bdc_IndustrialSolutionsMember_EBBA2BAAAB475765CA6DA5515B1C7847" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_NetworkSecuritySolutionsMember" xlink:label="loc_bdc_NetworkSecuritySolutionsMember_B4FC176DD63BE442E7A7A5515B1D523E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_41BD0E60A762E062E3F3A5515B1C2FB5" xlink:to="loc_bdc_NetworkSecuritySolutionsMember_B4FC176DD63BE442E7A7A5515B1D523E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SeveranceCosts1" xlink:label="loc_us-gaap_SeveranceCosts1_1716D9FD2E47F78F0E5BA5515B1DBFBD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_465F2A22AF76F0900801A5515B1DD0C2" xlink:to="loc_us-gaap_SeveranceCosts1_1716D9FD2E47F78F0E5BA5515B1DBFBD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherRestructuringCosts" xlink:label="loc_us-gaap_OtherRestructuringCosts_7A196BD69E4B12BC6AA8A5515B1D0EC3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_465F2A22AF76F0900801A5515B1DD0C2" xlink:to="loc_us-gaap_OtherRestructuringCosts_7A196BD69E4B12BC6AA8A5515B1D0EC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_3D4C48AC2B5D4D457BF9A5515B1DF99A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_465F2A22AF76F0900801A5515B1DD0C2" xlink:to="loc_us-gaap_RestructuringCharges_3D4C48AC2B5D4D457BF9A5515B1DF99A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/SeveranceRestructuringAndAcquisitionIntegrationActivitiesTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/ShareRepurchasesDetails" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/ShareRepurchasesShareRepurchases" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/SubsequentEvents" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/SubsequentEventsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_1CD11BF27AB50DF8801EA5513B252761" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_937286F4BA52DAF684D6A5513B2302BD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_1CD11BF27AB50DF8801EA5513B252761" xlink:to="loc_us-gaap_SubsequentEventTable_937286F4BA52DAF684D6A5513B2302BD" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_8196F944101DEDB188DEA58EDA68F5E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_937286F4BA52DAF684D6A5513B2302BD" xlink:to="loc_us-gaap_StatementScenarioAxis_8196F944101DEDB188DEA58EDA68F5E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_9F281647F7E159A7A960A58EDA689C57_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_8196F944101DEDB188DEA58EDA68F5E1" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_9F281647F7E159A7A960A58EDA689C57_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_9F281647F7E159A7A960A58EDA689C57" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_8196F944101DEDB188DEA58EDA68F5E1" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_9F281647F7E159A7A960A58EDA689C57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioForecastMember" xlink:label="loc_us-gaap_ScenarioForecastMember_16B4A620A43409DE8E36A5513B25F2F9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_9F281647F7E159A7A960A58EDA689C57" xlink:to="loc_us-gaap_ScenarioForecastMember_16B4A620A43409DE8E36A5513B25F2F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_D7DF3B992BBF87648076A5513B23B7A6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_937286F4BA52DAF684D6A5513B2302BD" xlink:to="loc_us-gaap_DebtInstrumentAxis_D7DF3B992BBF87648076A5513B23B7A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_22C2C3C12565529CC2BAA5513B2444AB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_D7DF3B992BBF87648076A5513B23B7A6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_22C2C3C12565529CC2BAA5513B2444AB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_22C2C3C12565529CC2BAA5513B2444AB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_D7DF3B992BBF87648076A5513B23B7A6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_22C2C3C12565529CC2BAA5513B2444AB" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_A3.375SeniorSubordinatedNotesDue2027Member" xlink:label="loc_bdc_A3.375SeniorSubordinatedNotesDue2027Member_D051368713459948DE8FA5513B249DFF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_22C2C3C12565529CC2BAA5513B2444AB" xlink:to="loc_bdc_A3.375SeniorSubordinatedNotesDue2027Member_D051368713459948DE8FA5513B249DFF" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyTwoMember" xlink:label="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyTwoMember_3E6CC2E4729E1A7F3E13A5513B2473C4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_22C2C3C12565529CC2BAA5513B2444AB" xlink:to="loc_bdc_FivePointFiveZeroPercentSeniorSubordinatedNotesDueTwoThousandTwentyTwoMember_3E6CC2E4729E1A7F3E13A5513B2473C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_C47DCBEF9FBBD37BDD5AA5513B2466B7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_937286F4BA52DAF684D6A5513B2302BD" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_C47DCBEF9FBBD37BDD5AA5513B2466B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7908414D7C6BCC88CBE1A5513B24AA1A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_C47DCBEF9FBBD37BDD5AA5513B2466B7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7908414D7C6BCC88CBE1A5513B24AA1A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7908414D7C6BCC88CBE1A5513B24AA1A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_C47DCBEF9FBBD37BDD5AA5513B2466B7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7908414D7C6BCC88CBE1A5513B24AA1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SeniorSubordinatedNotesMember" xlink:label="loc_us-gaap_SeniorSubordinatedNotesMember_B1343F48BB33D4BB5B00A5513B24FA1D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_7908414D7C6BCC88CBE1A5513B24AA1A" xlink:to="loc_us-gaap_SeniorSubordinatedNotesMember_B1343F48BB33D4BB5B00A5513B24FA1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_3660BE8099EA12B5BBD6A5513B25FEA7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_937286F4BA52DAF684D6A5513B2302BD" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_3660BE8099EA12B5BBD6A5513B25FEA7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_D3A605060D9A5C074F27A5513B25C40B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_3660BE8099EA12B5BBD6A5513B25FEA7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_D3A605060D9A5C074F27A5513B25C40B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_D3A605060D9A5C074F27A5513B25C40B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_3660BE8099EA12B5BBD6A5513B25FEA7" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_D3A605060D9A5C074F27A5513B25C40B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_2B824F7858B988D11C45A5513B250D6C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_D3A605060D9A5C074F27A5513B25C40B" xlink:to="loc_us-gaap_SubsequentEventMember_2B824F7858B988D11C45A5513B250D6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_02B1EFBFECDE9A416C00A5513B2507B3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_1CD11BF27AB50DF8801EA5513B252761" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_02B1EFBFECDE9A416C00A5513B2507B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_F377409AC2DEE6F9A11FA5513B25BA68" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_1CD11BF27AB50DF8801EA5513B252761" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_F377409AC2DEE6F9A11FA5513B25BA68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="loc_us-gaap_RepaymentsOfDebt_4DC3CCDE321F56B5C065A5513B2544DA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_1CD11BF27AB50DF8801EA5513B252761" xlink:to="loc_us-gaap_RepaymentsOfDebt_4DC3CCDE321F56B5C065A5513B2544DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_59FD87C46698989ECA4DA5513B2581DD" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_1CD11BF27AB50DF8801EA5513B252761" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_59FD87C46698989ECA4DA5513B2581DD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/SummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.belden.com/role/SummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="bdc-20170702.xsd#bdc_SignificantAccountingPoliciesLineItems" xlink:label="loc_bdc_SignificantAccountingPoliciesLineItems_904E968301778BFE9424A5515B6CE903" xlink:type="locator" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_SignificantAccountingPoliciesTable" xlink:label="loc_bdc_SignificantAccountingPoliciesTable_C87AE4A2686C00642138A5515B6B313A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_bdc_SignificantAccountingPoliciesLineItems_904E968301778BFE9424A5515B6CE903" xlink:to="loc_bdc_SignificantAccountingPoliciesTable_C87AE4A2686C00642138A5515B6B313A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_6EFEF77E97AC7EEB3D29A5515B6BD48F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_bdc_SignificantAccountingPoliciesTable_C87AE4A2686C00642138A5515B6B313A" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_6EFEF77E97AC7EEB3D29A5515B6BD48F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F95955583985A3229BACA5515B6C22F1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_6EFEF77E97AC7EEB3D29A5515B6BD48F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F95955583985A3229BACA5515B6C22F1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F95955583985A3229BACA5515B6C22F1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_6EFEF77E97AC7EEB3D29A5515B6BD48F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F95955583985A3229BACA5515B6C22F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TrademarksMember" xlink:label="loc_us-gaap_TrademarksMember_784A728CACDDAAD0A91AA5515B6C4664" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_F95955583985A3229BACA5515B6C22F1" xlink:to="loc_us-gaap_TrademarksMember_784A728CACDDAAD0A91AA5515B6C4664" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_F89558AB5B74F2BCB9BDA5515B6C81CE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_bdc_SignificantAccountingPoliciesTable_C87AE4A2686C00642138A5515B6B313A" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_F89558AB5B74F2BCB9BDA5515B6C81CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_FD14DB168A1E428D1436A5515B6C6DF6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F89558AB5B74F2BCB9BDA5515B6C81CE" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_FD14DB168A1E428D1436A5515B6C6DF6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_FD14DB168A1E428D1436A5515B6C6DF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F89558AB5B74F2BCB9BDA5515B6C81CE" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_FD14DB168A1E428D1436A5515B6C6DF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_B59FEB88719F965C1140A5515B6C0E14" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_FD14DB168A1E428D1436A5515B6C6DF6" xlink:to="loc_us-gaap_SubsidiariesMember_B59FEB88719F965C1140A5515B6C0E14" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LitigationCaseAxis" xlink:label="loc_us-gaap_LitigationCaseAxis_AE9C3969478B26DAB91CA5515B6CD115" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_bdc_SignificantAccountingPoliciesTable_C87AE4A2686C00642138A5515B6B313A" xlink:to="loc_us-gaap_LitigationCaseAxis_AE9C3969478B26DAB91CA5515B6CD115" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="loc_us-gaap_LitigationCaseTypeDomain_2003AD747DEF489AB390A5515B6C89FC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationCaseAxis_AE9C3969478B26DAB91CA5515B6CD115" xlink:to="loc_us-gaap_LitigationCaseTypeDomain_2003AD747DEF489AB390A5515B6C89FC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LitigationCaseTypeDomain" xlink:label="loc_us-gaap_LitigationCaseTypeDomain_2003AD747DEF489AB390A5515B6C89FC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationCaseAxis_AE9C3969478B26DAB91CA5515B6CD115" xlink:to="loc_us-gaap_LitigationCaseTypeDomain_2003AD747DEF489AB390A5515B6C89FC" xlink:type="arc" />
    <link:loc xlink:href="bdc-20170702.xsd#bdc_CorningMember" xlink:label="loc_bdc_CorningMember_3C25E86C987538F5C1F5A5515B6CFD1A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationCaseTypeDomain_2003AD747DEF489AB390A5515B6C89FC" xlink:to="loc_bdc_CorningMember_3C25E86C987538F5C1F5A5515B6CFD1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_02DA8D580FD6B53C19D2A5515B6CF181" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_bdc_SignificantAccountingPoliciesTable_C87AE4A2686C00642138A5515B6B313A" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_02DA8D580FD6B53C19D2A5515B6CF181" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_D71149E99B14CB47335BA5515B6C6CD2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_02DA8D580FD6B53C19D2A5515B6CF181" xlink:to="loc_us-gaap_LossContingencyNatureDomain_D71149E99B14CB47335BA5515B6C6CD2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingencyNatureDomain" xlink:label="loc_us-gaap_LossContingencyNatureDomain_D71149E99B14CB47335BA5515B6C6CD2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_02DA8D580FD6B53C19D2A5515B6CF181" xlink:to="loc_us-gaap_LossContingencyNatureDomain_D71149E99B14CB47335BA5515B6C6CD2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StandbyLettersOfCreditMember" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_E6A3F339F8E61CC0446DA5515B6C3236" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_D71149E99B14CB47335BA5515B6C6CD2" xlink:to="loc_us-gaap_StandbyLettersOfCreditMember_E6A3F339F8E61CC0446DA5515B6C3236" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SuretyBondMember" xlink:label="loc_us-gaap_SuretyBondMember_2CD03538F714A62DB344A5515B6C066E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_D71149E99B14CB47335BA5515B6C6CD2" xlink:to="loc_us-gaap_SuretyBondMember_2CD03538F714A62DB344A5515B6C066E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GuaranteeObligationsMember" xlink:label="loc_us-gaap_GuaranteeObligationsMember_609EA0F4FC5B83541B67A5515B6C22D1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_D71149E99B14CB47335BA5515B6C6CD2" xlink:to="loc_us-gaap_GuaranteeObligationsMember_609EA0F4FC5B83541B67A5515B6C22D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_93FCDE0B51A49F643A34A5515B6DD942" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bdc_SignificantAccountingPoliciesLineItems_904E968301778BFE9424A5515B6CE903" xlink:to="loc_us-gaap_NumberOfReportableSegments_93FCDE0B51A49F643A34A5515B6DD942" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_F85D0B0210011B5C9255A5515B6DAA6B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bdc_SignificantAccountingPoliciesLineItems_904E968301778BFE9424A5515B6CE903" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_F85D0B0210011B5C9255A5515B6DAA6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_94013C753ADD0D54E299A5515B6DC32B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bdc_SignificantAccountingPoliciesLineItems_904E968301778BFE9424A5515B6CE903" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_94013C753ADD0D54E299A5515B6DC32B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss" xlink:label="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_D7A6C454FB4B68D2B1AAA5515B6D5A30" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bdc_SignificantAccountingPoliciesLineItems_904E968301778BFE9424A5515B6CE903" xlink:to="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_D7A6C454FB4B68D2B1AAA5515B6D5A30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainContingencyPatentsAllegedlyInfringedUponNumber" xlink:label="loc_us-gaap_GainContingencyPatentsAllegedlyInfringedUponNumber_44AFF2EB6E50C1EBCA55A5515B6D0D39" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bdc_SignificantAccountingPoliciesLineItems_904E968301778BFE9424A5515B6CE903" xlink:to="loc_us-gaap_GainContingencyPatentsAllegedlyInfringedUponNumber_44AFF2EB6E50C1EBCA55A5515B6D0D39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainContingencyPatentsFoundInfringedUponNumber" xlink:label="loc_us-gaap_GainContingencyPatentsFoundInfringedUponNumber_CA5B713AB456149C4A01A5515B6D262A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bdc_SignificantAccountingPoliciesLineItems_904E968301778BFE9424A5515B6CE903" xlink:to="loc_us-gaap_GainContingencyPatentsFoundInfringedUponNumber_CA5B713AB456149C4A01A5515B6D262A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedFromOtherParty" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedFromOtherParty_80F37B974F1B7174B2DCA5515B6DEC80" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bdc_SignificantAccountingPoliciesLineItems_904E968301778BFE9424A5515B6CE903" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedFromOtherParty_80F37B974F1B7174B2DCA5515B6DEC80" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.belden.com/role/SummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
</link:linkbase>
