<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019c76f6-2a43-7c8c-990e-0d2fbc73e909,g:17d43c69-d56b-41c8-b180-8b34fd71896d-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.scansource.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYUNAUDITED" xlink:type="simple" xlink:href="scsc-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYUNAUDITED"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYUNAUDITED" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c76f6-2bb5-7e8e-b914-162f4c3e8fe3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019c76f6-2bb5-7f0a-a956-265725d89578" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019c76f6-2bb5-7e8e-b914-162f4c3e8fe3" xlink:to="loc_us-gaap_StatementTable_019c76f6-2bb5-7f0a-a956-265725d89578" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019c76f6-2bb5-719a-bc0a-6514e27caa0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019c76f6-2bb5-7f0a-a956-265725d89578" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019c76f6-2bb5-719a-bc0a-6514e27caa0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-719a-bc0a-6514e27caa0e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c76f6-2bb5-719a-bc0a-6514e27caa0e" xlink:to="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-719a-bc0a-6514e27caa0e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-7cb3-8075-0d6b9a6bad99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c76f6-2bb5-719a-bc0a-6514e27caa0e" xlink:to="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-7cb3-8075-0d6b9a6bad99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019c76f6-2bb5-7846-8275-e5769573d786" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-7cb3-8075-0d6b9a6bad99" xlink:to="loc_us-gaap_CommonStockMember_019c76f6-2bb5-7846-8275-e5769573d786" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_019c76f6-2bb5-7a5e-9334-3c149522f1c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-7cb3-8075-0d6b9a6bad99" xlink:to="loc_us-gaap_CommonStockIncludingAdditionalPaidInCapitalMember_019c76f6-2bb5-7a5e-9334-3c149522f1c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019c76f6-2bb5-702d-be99-1eacfd0167f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-7cb3-8075-0d6b9a6bad99" xlink:to="loc_us-gaap_RetainedEarningsMember_019c76f6-2bb5-702d-be99-1eacfd0167f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c76f6-2bb5-7c6e-9288-f7460e53bf94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-7cb3-8075-0d6b9a6bad99" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c76f6-2bb5-7c6e-9288-f7460e53bf94" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c76f6-2bb5-7e8e-b914-162f4c3e8fe3" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019c76f6-2bb5-7cc9-84b3-c696e43e7d04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_SharesOutstanding_019c76f6-2bb5-7cc9-84b3-c696e43e7d04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019c76f6-2bb5-789a-8b2f-07d8554bd17b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_StockholdersEquity_019c76f6-2bb5-789a-8b2f-07d8554bd17b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019c76f6-2bb5-7c83-a42d-d8ffe9310650" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_NetIncomeLoss_019c76f6-2bb5-7c83-a42d-d8ffe9310650" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_019c76f6-2bb5-72bf-b28f-0c6c96131679" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_019c76f6-2bb5-72bf-b28f-0c6c96131679" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019c76f6-2bb5-7eeb-b17f-62ff4ce63390" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_019c76f6-2bb5-7eeb-b17f-62ff4ce63390" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019c76f6-2bb5-7fa5-acf6-9008df865055" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019c76f6-2bb5-7fa5-acf6-9008df865055" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019c76f6-2bb5-7dc7-9b8a-e7d8a00cf411" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019c76f6-2bb5-7dc7-9b8a-e7d8a00cf411" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019c76f6-2bb5-7ad3-818c-feab3a74ad7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_019c76f6-2bb5-7ad3-818c-feab3a74ad7a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019c76f6-2bb5-7de5-a453-691eb9dfbd25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_019c76f6-2bb5-7de5-a453-691eb9dfbd25" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019c76f6-2bb5-7f41-9f36-5885b5e75934" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c76f6-2bb5-7263-aade-da86a25aa885" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019c76f6-2bb5-7f41-9f36-5885b5e75934" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019c76f6-2bb5-77d1-a63e-ba63cf113930" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019c76f6-2bb5-7a6d-967a-33d2e0df0094" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/BusinessandSummaryofSignificantAccountingPoliciesDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#BusinessandSummaryofSignificantAccountingPoliciesDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/BusinessandSummaryofSignificantAccountingPoliciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsLineItems_019c76f6-2bb5-71a8-9eb5-b6dc50cf4e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_019c76f6-2bb5-7dfd-8ba4-22b46b0fe7e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019c76f6-2bb5-71a8-9eb5-b6dc50cf4e9d" xlink:to="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_019c76f6-2bb5-7dfd-8ba4-22b46b0fe7e2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_019c76f6-2bb5-7df1-95cc-700c1ed23cae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_019c76f6-2bb5-7dfd-8ba4-22b46b0fe7e2" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_019c76f6-2bb5-7df1-95cc-700c1ed23cae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019c76f6-2bb5-7df1-95cc-700c1ed23cae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019c76f6-2bb5-7df1-95cc-700c1ed23cae" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019c76f6-2bb5-7df1-95cc-700c1ed23cae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_019c76f6-2bb5-7d17-bdeb-7bd34cc12741" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_019c76f6-2bb5-7df1-95cc-700c1ed23cae" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_019c76f6-2bb5-7d17-bdeb-7bd34cc12741" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankOverdraftsMember_019c76f6-2bb5-74c6-862f-36a390db7557" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BankOverdraftsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_019c76f6-2bb5-7d17-bdeb-7bd34cc12741" xlink:to="loc_us-gaap_BankOverdraftsMember_019c76f6-2bb5-74c6-862f-36a390db7557" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019c76f6-2bb5-776f-9361-f814cfd8f8cd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCashAndCashEquivalentsTable_019c76f6-2bb5-7dfd-8ba4-22b46b0fe7e2" xlink:to="loc_srt_ProductOrServiceAxis_019c76f6-2bb5-776f-9361-f814cfd8f8cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-776f-9361-f814cfd8f8cd_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019c76f6-2bb5-776f-9361-f814cfd8f8cd" xlink:to="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-776f-9361-f814cfd8f8cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-7dc4-98a6-17771fe00768" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019c76f6-2bb5-776f-9361-f814cfd8f8cd" xlink:to="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-7dc4-98a6-17771fe00768" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductMember_019c76f6-2bb5-7c63-8ea8-2f8cbd538812" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-7dc4-98a6-17771fe00768" xlink:to="loc_us-gaap_ProductMember_019c76f6-2bb5-7c63-8ea8-2f8cbd538812" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019c76f6-2bb5-7ff2-8aaa-27cfa1a2e219" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019c76f6-2bb5-71a8-9eb5-b6dc50cf4e9d" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019c76f6-2bb5-7ff2-8aaa-27cfa1a2e219" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrentAndNoncurrent_019c76f6-2bb5-76a9-a0de-38c78d0ebbff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019c76f6-2bb5-71a8-9eb5-b6dc50cf4e9d" xlink:to="loc_us-gaap_AccountsPayableCurrentAndNoncurrent_019c76f6-2bb5-76a9-a0de-38c78d0ebbff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationNonproduction_019c76f6-2bb5-705d-bb7c-b3b8edc1fca8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationNonproduction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019c76f6-2bb5-71a8-9eb5-b6dc50cf4e9d" xlink:to="loc_us-gaap_DepreciationNonproduction_019c76f6-2bb5-705d-bb7c-b3b8edc1fca8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciation_019c76f6-2bb5-7474-8f42-b7b147e17061" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSoldDepreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019c76f6-2bb5-71a8-9eb5-b6dc50cf4e9d" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSoldDepreciation_019c76f6-2bb5-7474-8f42-b7b147e17061" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019c76f6-2bb5-7f02-856e-edb0d6de8e11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashAndCashEquivalentsLineItems_019c76f6-2bb5-71a8-9eb5-b6dc50cf4e9d" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019c76f6-2bb5-7f02-856e-edb0d6de8e11" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/RevenueRecognitionDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#RevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/RevenueRecognitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019c76f6-2bb5-72ed-99f2-a3074a64530f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019c76f6-2bb5-7d60-9193-20167ac2fe70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c76f6-2bb5-72ed-99f2-a3074a64530f" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019c76f6-2bb5-7d60-9193-20167ac2fe70" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019c76f6-2bb5-7c97-a7c3-ae452e4ede1a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c76f6-2bb5-7d60-9193-20167ac2fe70" xlink:to="loc_srt_ProductOrServiceAxis_019c76f6-2bb5-7c97-a7c3-ae452e4ede1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-7c97-a7c3-ae452e4ede1a_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019c76f6-2bb5-7c97-a7c3-ae452e4ede1a" xlink:to="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-7c97-a7c3-ae452e4ede1a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-7807-b554-067bdaeec110" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019c76f6-2bb5-7c97-a7c3-ae452e4ede1a" xlink:to="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-7807-b554-067bdaeec110" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_ProductsAndServicesMember_019c76f6-2bb5-70ad-bf0e-958fb79dcdad" xlink:href="scsc-20260331.xsd#scsc_ProductsAndServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-7807-b554-067bdaeec110" xlink:to="loc_scsc_ProductsAndServicesMember_019c76f6-2bb5-70ad-bf0e-958fb79dcdad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_RecurringRevenueMember_019c76f6-2bb5-7dab-babf-f59d335bd195" xlink:href="scsc-20260331.xsd#scsc_RecurringRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c76f6-2bb5-7807-b554-067bdaeec110" xlink:to="loc_scsc_RecurringRevenueMember_019c76f6-2bb5-7dab-babf-f59d335bd195" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7f7f-a7b2-807b1fabd1cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019c76f6-2bb5-7d60-9193-20167ac2fe70" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7f7f-a7b2-807b1fabd1cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7f7f-a7b2-807b1fabd1cb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7f7f-a7b2-807b1fabd1cb" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7f7f-a7b2-807b1fabd1cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-79db-8141-b2a6f0969dca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7f7f-a7b2-807b1fabd1cb" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-79db-8141-b2a6f0969dca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-7cff-81f4-490cbadcc971" xlink:href="scsc-20260331.xsd#scsc_SpecialtyTechnologySolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-79db-8141-b2a6f0969dca" xlink:to="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-7cff-81f4-490cbadcc971" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-7e24-aefa-a8520185ca0e" xlink:href="scsc-20260331.xsd#scsc_IntelisysAdvisoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-79db-8141-b2a6f0969dca" xlink:to="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-7e24-aefa-a8520185ca0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c76f6-2bb5-721b-9a32-22fc0637d3c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019c76f6-2bb5-72ed-99f2-a3074a64530f" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c76f6-2bb5-721b-9a32-22fc0637d3c1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/AccumulatedOtherComprehensiveLossDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#AccumulatedOtherComprehensiveLossDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/AccumulatedOtherComprehensiveLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019c76f6-2bb5-714b-9358-c354a7948805" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019c76f6-2bb5-7fa1-a04b-36fedd035229" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019c76f6-2bb5-714b-9358-c354a7948805" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019c76f6-2bb5-7fa1-a04b-36fedd035229" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019c76f6-2bb5-734f-8859-3e87f0c9aa9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019c76f6-2bb5-7fa1-a04b-36fedd035229" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019c76f6-2bb5-734f-8859-3e87f0c9aa9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-734f-8859-3e87f0c9aa9c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c76f6-2bb5-734f-8859-3e87f0c9aa9c" xlink:to="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-734f-8859-3e87f0c9aa9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-75da-a9ea-733a6fb0ce23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c76f6-2bb5-734f-8859-3e87f0c9aa9c" xlink:to="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-75da-a9ea-733a6fb0ce23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019c76f6-2bb5-777a-b8af-d1ab89fe9157" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-75da-a9ea-733a6fb0ce23" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019c76f6-2bb5-777a-b8af-d1ab89fe9157" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_019c76f6-2bb5-7ee2-b52c-d1454d6c045f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-75da-a9ea-733a6fb0ce23" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_019c76f6-2bb5-7ee2-b52c-d1454d6c045f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c76f6-2bb5-73c9-b364-967a5829d5be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c76f6-2bb5-75da-a9ea-733a6fb0ce23" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c76f6-2bb5-73c9-b364-967a5829d5be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019c76f6-2bb5-7936-ac30-0d358a7df2ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019c76f6-2bb5-714b-9358-c354a7948805" xlink:to="loc_us-gaap_StockholdersEquity_019c76f6-2bb5-7936-ac30-0d358a7df2ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_019c76f6-2bb5-7084-87f6-2f2f89dc0afb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019c76f6-2bb5-714b-9358-c354a7948805" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTaxPortionAttributableToParent1_019c76f6-2bb5-7084-87f6-2f2f89dc0afb" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/GoodwillandOtherIdentifiableIntangibleAssetsChangesintheCarryingAmountofGoodwillDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#GoodwillandOtherIdentifiableIntangibleAssetsChangesintheCarryingAmountofGoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/GoodwillandOtherIdentifiableIntangibleAssetsChangesintheCarryingAmountofGoodwillDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c76f6-2bb5-78fe-a8a1-3c028741ab20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_019c76f6-2bb5-70e2-bf9b-184468c1dbb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019c76f6-2bb5-78fe-a8a1-3c028741ab20" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_019c76f6-2bb5-70e2-bf9b-184468c1dbb4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7cd3-9db4-c73211867d24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_019c76f6-2bb5-70e2-bf9b-184468c1dbb4" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7cd3-9db4-c73211867d24" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7cd3-9db4-c73211867d24_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7cd3-9db4-c73211867d24" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7cd3-9db4-c73211867d24_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7c10-bf2b-78281cecba9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7cd3-9db4-c73211867d24" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7c10-bf2b-78281cecba9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-7669-9082-394841635c93" xlink:href="scsc-20260331.xsd#scsc_SpecialtyTechnologySolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7c10-bf2b-78281cecba9c" xlink:to="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-7669-9082-394841635c93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-79e2-81f4-4fd5b89fc0ac" xlink:href="scsc-20260331.xsd#scsc_IntelisysAdvisoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7c10-bf2b-78281cecba9c" xlink:to="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-79e2-81f4-4fd5b89fc0ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_019c76f6-2bb5-7453-ab34-778be1fc7f03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c76f6-2bb5-78fe-a8a1-3c028741ab20" xlink:to="loc_us-gaap_GoodwillRollForward_019c76f6-2bb5-7453-ab34-778be1fc7f03" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019c76f6-2bb5-7294-a2f7-9b0fb2ffbc63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c76f6-2bb5-7453-ab34-778be1fc7f03" xlink:to="loc_us-gaap_Goodwill_019c76f6-2bb5-7294-a2f7-9b0fb2ffbc63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_019c76f6-2bb5-7235-b797-5061cca0c8be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c76f6-2bb5-7453-ab34-778be1fc7f03" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_019c76f6-2bb5-7235-b797-5061cca0c8be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_019c76f6-2bb5-70f1-8a25-ca5b6331b268" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c76f6-2bb5-7453-ab34-778be1fc7f03" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_019c76f6-2bb5-70f1-8a25-ca5b6331b268" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019c76f6-2bb5-762b-827e-444a04ca0fcb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/ShortTermBorrowingsandLongTermDebtLongtermDebtDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#ShortTermBorrowingsandLongTermDebtLongtermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/ShortTermBorrowingsandLongTermDebtLongtermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7f2f-83ba-23c304d4aa64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_ShortTermBorrowingsLineOfCreditAndLongTermDebtTable_019c76f6-2bb5-7cc5-8c76-b131f7201a59" xlink:href="scsc-20260331.xsd#scsc_ShortTermBorrowingsLineOfCreditAndLongTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7f2f-83ba-23c304d4aa64" xlink:to="loc_scsc_ShortTermBorrowingsLineOfCreditAndLongTermDebtTable_019c76f6-2bb5-7cc5-8c76-b131f7201a59" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c76f6-2bb5-7bdd-a01c-79eed8b4189c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_scsc_ShortTermBorrowingsLineOfCreditAndLongTermDebtTable_019c76f6-2bb5-7cc5-8c76-b131f7201a59" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c76f6-2bb5-7bdd-a01c-79eed8b4189c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-7bdd-a01c-79eed8b4189c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c76f6-2bb5-7bdd-a01c-79eed8b4189c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-7bdd-a01c-79eed8b4189c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-73dd-9083-1dff49f48d94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c76f6-2bb5-7bdd-a01c-79eed8b4189c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-73dd-9083-1dff49f48d94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_MississippiRevenueBondMember_019c76f6-2bb5-7309-82c3-69382377ea78" xlink:href="scsc-20260331.xsd#scsc_MississippiRevenueBondMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-73dd-9083-1dff49f48d94" xlink:to="loc_scsc_MississippiRevenueBondMember_019c76f6-2bb5-7309-82c3-69382377ea78" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019c76f6-2bb5-7cfd-b064-147403e1c610" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_scsc_ShortTermBorrowingsLineOfCreditAndLongTermDebtTable_019c76f6-2bb5-7cc5-8c76-b131f7201a59" xlink:to="loc_us-gaap_CreditFacilityAxis_019c76f6-2bb5-7cfd-b064-147403e1c610" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-7cfd-b064-147403e1c610_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019c76f6-2bb5-7cfd-b064-147403e1c610" xlink:to="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-7cfd-b064-147403e1c610_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-737d-9bcb-e4eb69968029" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019c76f6-2bb5-7cfd-b064-147403e1c610" xlink:to="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-737d-9bcb-e4eb69968029" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_TermLoanFacilityMember_019c76f6-2bb5-7894-a1a2-015f3833e746" xlink:href="scsc-20260331.xsd#scsc_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-737d-9bcb-e4eb69968029" xlink:to="loc_scsc_TermLoanFacilityMember_019c76f6-2bb5-7894-a1a2-015f3833e746" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019c76f6-2bb5-716c-9947-71f275501208" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7f2f-83ba-23c304d4aa64" xlink:to="loc_us-gaap_LongTermDebtCurrent_019c76f6-2bb5-716c-9947-71f275501208" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019c76f6-2bb5-76a1-b3f0-14c009642838" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7f2f-83ba-23c304d4aa64" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019c76f6-2bb5-76a1-b3f0-14c009642838" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_019c76f6-2bb5-7148-92ee-83558d0b37ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7f2f-83ba-23c304d4aa64" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_019c76f6-2bb5-7148-92ee-83558d0b37ba" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/ShortTermBorrowingsandLongTermDebtNarrativeDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#ShortTermBorrowingsandLongTermDebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/ShortTermBorrowingsandLongTermDebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c76f6-2bb5-759a-8c5c-fac12cc38ed3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_DebtInstrumentTable_019c76f6-2bb5-759a-8c5c-fac12cc38ed3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019c76f6-2bb5-714e-b81b-a980771bff7b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c76f6-2bb5-759a-8c5c-fac12cc38ed3" xlink:to="loc_us-gaap_CreditFacilityAxis_019c76f6-2bb5-714e-b81b-a980771bff7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-714e-b81b-a980771bff7b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019c76f6-2bb5-714e-b81b-a980771bff7b" xlink:to="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-714e-b81b-a980771bff7b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-7f17-8726-21e48c49b7f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019c76f6-2bb5-714e-b81b-a980771bff7b" xlink:to="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-7f17-8726-21e48c49b7f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_MultiCurrencyRevolvingCreditFacilityAmendedCreditAgreementMember_019c76f6-2bb5-77a3-be23-54402326d7fd" xlink:href="scsc-20260331.xsd#scsc_MultiCurrencyRevolvingCreditFacilityAmendedCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-7f17-8726-21e48c49b7f0" xlink:to="loc_scsc_MultiCurrencyRevolvingCreditFacilityAmendedCreditAgreementMember_019c76f6-2bb5-77a3-be23-54402326d7fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_TermLoanFacilityMember_019c76f6-2bb5-719a-a554-0e59ce0ace23" xlink:href="scsc-20260331.xsd#scsc_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-7f17-8726-21e48c49b7f0" xlink:to="loc_scsc_TermLoanFacilityMember_019c76f6-2bb5-719a-a554-0e59ce0ace23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019c76f6-2bb5-788a-926a-9afc71366d76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-7f17-8726-21e48c49b7f0" xlink:to="loc_us-gaap_LetterOfCreditMember_019c76f6-2bb5-788a-926a-9afc71366d76" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019c76f6-2bb5-7f14-a71e-39284f18fccb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c76f6-2bb5-7f17-8726-21e48c49b7f0" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019c76f6-2bb5-7f14-a71e-39284f18fccb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c76f6-2bb5-72dc-addc-37da82f1c290" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c76f6-2bb5-759a-8c5c-fac12cc38ed3" xlink:to="loc_srt_RangeAxis_019c76f6-2bb5-72dc-addc-37da82f1c290" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c76f6-2bb5-72dc-addc-37da82f1c290_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c76f6-2bb5-72dc-addc-37da82f1c290" xlink:to="loc_srt_RangeMember_019c76f6-2bb5-72dc-addc-37da82f1c290_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c76f6-2bb5-7fda-9cbb-973047e24da1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c76f6-2bb5-72dc-addc-37da82f1c290" xlink:to="loc_srt_RangeMember_019c76f6-2bb5-7fda-9cbb-973047e24da1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c76f6-2bb5-7f98-9b25-03fc9dda4364" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c76f6-2bb5-7fda-9cbb-973047e24da1" xlink:to="loc_srt_MinimumMember_019c76f6-2bb5-7f98-9b25-03fc9dda4364" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c76f6-2bb5-70eb-8c66-1f0fdd174eb7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c76f6-2bb5-7fda-9cbb-973047e24da1" xlink:to="loc_srt_MaximumMember_019c76f6-2bb5-70eb-8c66-1f0fdd174eb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019c76f6-2bb5-74af-bfa0-e4aae0dee940" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c76f6-2bb5-759a-8c5c-fac12cc38ed3" xlink:to="loc_us-gaap_VariableRateAxis_019c76f6-2bb5-74af-bfa0-e4aae0dee940" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019c76f6-2bb5-74af-bfa0-e4aae0dee940_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019c76f6-2bb5-74af-bfa0-e4aae0dee940" xlink:to="loc_us-gaap_VariableRateDomain_019c76f6-2bb5-74af-bfa0-e4aae0dee940_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019c76f6-2bb5-7bf3-a22d-dd5ef9cfe4f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019c76f6-2bb5-74af-bfa0-e4aae0dee940" xlink:to="loc_us-gaap_VariableRateDomain_019c76f6-2bb5-7bf3-a22d-dd5ef9cfe4f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019c76f6-2bb5-7fa6-8c4a-d8c4772db998" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019c76f6-2bb5-7bf3-a22d-dd5ef9cfe4f8" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019c76f6-2bb5-7fa6-8c4a-d8c4772db998" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_AlternateBaseRateLoansMember_019c76f6-2bb5-75ed-853d-25f48b1fc0c6" xlink:href="scsc-20260331.xsd#scsc_AlternateBaseRateLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019c76f6-2bb5-7bf3-a22d-dd5ef9cfe4f8" xlink:to="loc_scsc_AlternateBaseRateLoansMember_019c76f6-2bb5-75ed-853d-25f48b1fc0c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c76f6-2bb5-7124-bfd6-9338872d1bf5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c76f6-2bb5-759a-8c5c-fac12cc38ed3" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c76f6-2bb5-7124-bfd6-9338872d1bf5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-7124-bfd6-9338872d1bf5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c76f6-2bb5-7124-bfd6-9338872d1bf5" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-7124-bfd6-9338872d1bf5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-7d6b-aacc-53c12d5497be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c76f6-2bb5-7124-bfd6-9338872d1bf5" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-7d6b-aacc-53c12d5497be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_MississippiRevenueBondMember_019c76f6-2bb5-7661-a81c-0484c068f795" xlink:href="scsc-20260331.xsd#scsc_MississippiRevenueBondMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c76f6-2bb5-7d6b-aacc-53c12d5497be" xlink:to="loc_scsc_MississippiRevenueBondMember_019c76f6-2bb5-7661-a81c-0484c068f795" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityExpirationPeriod_019c76f6-2bb5-76ce-b72b-b023fe21e76e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_LineOfCreditFacilityExpirationPeriod_019c76f6-2bb5-76ce-b72b-b023fe21e76e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c76f6-2bb5-7d6c-a737-9c9ea0f3b62f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c76f6-2bb5-7d6c-a737-9c9ea0f3b62f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption_019c76f6-2bb5-77b7-b6a7-c6cff4400cd2" xlink:href="scsc-20260331.xsd#scsc_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_scsc_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption_019c76f6-2bb5-77b7-b6a7-c6cff4400cd2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOptionPercentageOfEBITDA_019c76f6-2bb5-7b68-b38d-9fd1410ac589" xlink:href="scsc-20260331.xsd#scsc_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOptionPercentageOfEBITDA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_scsc_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOptionPercentageOfEBITDA_019c76f6-2bb5-7b68-b38d-9fd1410ac589" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019c76f6-2bb5-75bf-9294-ea9544baac9d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019c76f6-2bb5-75bf-9294-ea9544baac9d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_019c76f6-2bb5-7bcf-b153-7dad7a4f429c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_019c76f6-2bb5-7bcf-b153-7dad7a4f429c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019c76f6-2bb5-71d6-beb5-e21a6f1f82d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019c76f6-2bb5-71d6-beb5-e21a6f1f82d0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019c76f6-2bb5-7c17-bd37-14cfed8e0f03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019c76f6-2bb5-7c17-bd37-14cfed8e0f03" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_019c76f6-2bb5-791a-8b34-4c5a1111ccd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_019c76f6-2bb5-791a-8b34-4c5a1111ccd3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_LineOfCreditFacilityLeverageRatio_019c76f6-2bb5-7218-ba25-3ab9c77c1e49" xlink:href="scsc-20260331.xsd#scsc_LineOfCreditFacilityLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_scsc_LineOfCreditFacilityLeverageRatio_019c76f6-2bb5-7218-ba25-3ab9c77c1e49" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_LineOfCreditFacilityInterestCoverageRatio_019c76f6-2bb5-7d5d-865c-9658f7e04f53" xlink:href="scsc-20260331.xsd#scsc_LineOfCreditFacilityInterestCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_scsc_LineOfCreditFacilityInterestCoverageRatio_019c76f6-2bb5-7d5d-865c-9658f7e04f53" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_019c76f6-2bb5-74a9-a360-86ce203dd751" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAverageOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_LineOfCreditFacilityAverageOutstandingAmount_019c76f6-2bb5-74a9-a360-86ce203dd751" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019c76f6-2bb5-704b-a57f-a12db75be071" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019c76f6-2bb5-704b-a57f-a12db75be071" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c76f6-2bb5-7a3a-b80a-efd157ff4047" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019c76f6-2bb5-7a3a-b80a-efd157ff4047" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_DebtInstrumentExercisableOptionLimitationPeriod_019c76f6-2bb5-74bb-86b6-cbf73ba3bab9" xlink:href="scsc-20260331.xsd#scsc_DebtInstrumentExercisableOptionLimitationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_scsc_DebtInstrumentExercisableOptionLimitationPeriod_019c76f6-2bb5-74bb-86b6-cbf73ba3bab9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019c76f6-2bb5-7bdc-b454-902242141e4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019c76f6-2bb5-7bdc-b454-902242141e4b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_019c76f6-2bb5-705f-b720-8d069524563c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtPercentageBearingVariableInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_019c76f6-2bb5-705f-b720-8d069524563c" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_019c76f6-2bb5-79e2-a3e5-eefe44a54c59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c76f6-2bb5-7a5e-9c2d-1468514d01ed" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_019c76f6-2bb5-79e2-a3e5-eefe44a54c59" xlink:type="arc" order="17"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/DerivativesandHedgingActivitiesNarrativeDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#DerivativesandHedgingActivitiesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/DerivativesandHedgingActivitiesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019c76f6-2bb5-7117-8c4a-61bf5f04c543" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019c76f6-2bb5-7469-8d1d-0f2e5b733e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019c76f6-2bb5-7117-8c4a-61bf5f04c543" xlink:to="loc_us-gaap_DerivativeTable_019c76f6-2bb5-7469-8d1d-0f2e5b733e9a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-77ea-a28b-a72e6393a675" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019c76f6-2bb5-7469-8d1d-0f2e5b733e9a" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-77ea-a28b-a72e6393a675" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-77ea-a28b-a72e6393a675_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-77ea-a28b-a72e6393a675" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-77ea-a28b-a72e6393a675_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-78bb-927c-e3374d10836f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-77ea-a28b-a72e6393a675" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-78bb-927c-e3374d10836f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019c76f6-2bb5-7e4f-8ff3-a62cc9bed4b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-78bb-927c-e3374d10836f" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019c76f6-2bb5-7e4f-8ff3-a62cc9bed4b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-785e-a501-dd814fa55d9d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-78bb-927c-e3374d10836f" xlink:to="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-785e-a501-dd814fa55d9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_InterestRateSwapMaturingApril302026Member_019c76f6-2bb5-7f19-9f19-71e26fc110b9" xlink:href="scsc-20260331.xsd#scsc_InterestRateSwapMaturingApril302026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-785e-a501-dd814fa55d9d" xlink:to="loc_scsc_InterestRateSwapMaturingApril302026Member_019c76f6-2bb5-7f19-9f19-71e26fc110b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_InterestRateSwapMaturingMarch312028Member_019c76f6-2bb5-7b0b-b52d-28ae9f1415c4" xlink:href="scsc-20260331.xsd#scsc_InterestRateSwapMaturingMarch312028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-785e-a501-dd814fa55d9d" xlink:to="loc_scsc_InterestRateSwapMaturingMarch312028Member_019c76f6-2bb5-7b0b-b52d-28ae9f1415c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019c76f6-2bb5-72ca-8050-fd6d7afdce95" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019c76f6-2bb5-7117-8c4a-61bf5f04c543" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019c76f6-2bb5-72ca-8050-fd6d7afdce95" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/DerivativesandHedgingActivitiesScheduleofCashFlowHedgeIncludedinAccumulatedOtherComprehensiveIncomeLossNetofIncomeTaxesDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#DerivativesandHedgingActivitiesScheduleofCashFlowHedgeIncludedinAccumulatedOtherComprehensiveIncomeLossNetofIncomeTaxesDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/DerivativesandHedgingActivitiesScheduleofCashFlowHedgeIncludedinAccumulatedOtherComprehensiveIncomeLossNetofIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019c76f6-2bb5-77eb-ad0d-134c6deaad0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019c76f6-2bb5-7239-b9d6-80fcc864ebe8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019c76f6-2bb5-77eb-ad0d-134c6deaad0c" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019c76f6-2bb5-7239-b9d6-80fcc864ebe8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019c76f6-2bb5-7a58-81f7-f0de824ca236" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019c76f6-2bb5-7239-b9d6-80fcc864ebe8" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019c76f6-2bb5-7a58-81f7-f0de824ca236" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019c76f6-2bb5-7a58-81f7-f0de824ca236_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019c76f6-2bb5-7a58-81f7-f0de824ca236" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019c76f6-2bb5-7a58-81f7-f0de824ca236_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019c76f6-2bb5-7e08-8f1b-382cdb0f5b6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019c76f6-2bb5-7a58-81f7-f0de824ca236" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019c76f6-2bb5-7e08-8f1b-382cdb0f5b6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-7fc0-bab8-ac87edcdb77e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019c76f6-2bb5-7e08-8f1b-382cdb0f5b6f" xlink:to="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-7fc0-bab8-ac87edcdb77e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_019c76f6-2bb5-7358-b510-74808f45dfae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019c76f6-2bb5-77eb-ad0d-134c6deaad0c" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_019c76f6-2bb5-7358-b510-74808f45dfae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019c76f6-2bb5-71d0-8a13-d3547e244e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019c76f6-2bb5-77eb-ad0d-134c6deaad0c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019c76f6-2bb5-71d0-8a13-d3547e244e9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent_019c76f6-2bb5-7498-9da2-d5ec54c4d399" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019c76f6-2bb5-77eb-ad0d-134c6deaad0c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxParent_019c76f6-2bb5-7498-9da2-d5ec54c4d399" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent_019c76f6-2bb5-7d0f-966e-c011a1eda207" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019c76f6-2bb5-77eb-ad0d-134c6deaad0c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent_019c76f6-2bb5-7d0f-966e-c011a1eda207" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_019c76f6-2bb5-733b-9fd9-ad24a767318c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019c76f6-2bb5-77eb-ad0d-134c6deaad0c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_019c76f6-2bb5-733b-9fd9-ad24a767318c" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/DerivativesandHedgingActivitiesScheduleofDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#DerivativesandHedgingActivitiesScheduleofDerivativeInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/DerivativesandHedgingActivitiesScheduleofDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019c76f6-2bb5-7253-bd9d-dc79b904ecf7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019c76f6-2bb5-71e4-8b90-a25167623368" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019c76f6-2bb5-7253-bd9d-dc79b904ecf7" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019c76f6-2bb5-71e4-8b90-a25167623368" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_019c76f6-2bb5-738d-ade1-7dc9045ea511" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019c76f6-2bb5-71e4-8b90-a25167623368" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_019c76f6-2bb5-738d-ade1-7dc9045ea511" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019c76f6-2bb5-738d-ade1-7dc9045ea511_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019c76f6-2bb5-738d-ade1-7dc9045ea511" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019c76f6-2bb5-738d-ade1-7dc9045ea511_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019c76f6-2bb5-7bae-af60-a6ad5d1b0999" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019c76f6-2bb5-738d-ade1-7dc9045ea511" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019c76f6-2bb5-7bae-af60-a6ad5d1b0999" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_019c76f6-2bb5-79a9-bc4a-32ffc65a69e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019c76f6-2bb5-7bae-af60-a6ad5d1b0999" xlink:to="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_019c76f6-2bb5-79a9-bc4a-32ffc65a69e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_019c76f6-2bb5-7e06-86be-6e74a063acac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019c76f6-2bb5-7bae-af60-a6ad5d1b0999" xlink:to="loc_us-gaap_OtherNoncurrentAssetsMember_019c76f6-2bb5-7e06-86be-6e74a063acac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_AccruedLiabilitiesAndOtherCurrentLiabilitiesMember_019c76f6-2bb5-78e3-8837-75218740a995" xlink:href="scsc-20260331.xsd#scsc_AccruedLiabilitiesAndOtherCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019c76f6-2bb5-7bae-af60-a6ad5d1b0999" xlink:to="loc_scsc_AccruedLiabilitiesAndOtherCurrentLiabilitiesMember_019c76f6-2bb5-78e3-8837-75218740a995" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-70f5-a7b8-8882a9c29fbf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019c76f6-2bb5-71e4-8b90-a25167623368" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-70f5-a7b8-8882a9c29fbf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-70f5-a7b8-8882a9c29fbf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-70f5-a7b8-8882a9c29fbf" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-70f5-a7b8-8882a9c29fbf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7a93-aed7-41e17eadcbc5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-70f5-a7b8-8882a9c29fbf" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7a93-aed7-41e17eadcbc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019c76f6-2bb5-7b32-8ea0-605bc8d7071c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7a93-aed7-41e17eadcbc5" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019c76f6-2bb5-7b32-8ea0-605bc8d7071c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-790a-9156-2e0fe73e80bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7a93-aed7-41e17eadcbc5" xlink:to="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-790a-9156-2e0fe73e80bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_ForeignCurrencyHedgeMember_019c76f6-2bb5-78c1-bddd-0a79ddc9ab90" xlink:href="scsc-20260331.xsd#scsc_ForeignCurrencyHedgeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7a93-aed7-41e17eadcbc5" xlink:to="loc_scsc_ForeignCurrencyHedgeMember_019c76f6-2bb5-78c1-bddd-0a79ddc9ab90" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019c76f6-2bb5-778e-882f-708501ecd6a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019c76f6-2bb5-71e4-8b90-a25167623368" xlink:to="loc_us-gaap_HedgingDesignationAxis_019c76f6-2bb5-778e-882f-708501ecd6a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019c76f6-2bb5-778e-882f-708501ecd6a8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019c76f6-2bb5-778e-882f-708501ecd6a8" xlink:to="loc_us-gaap_HedgingDesignationDomain_019c76f6-2bb5-778e-882f-708501ecd6a8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019c76f6-2bb5-7fb3-be95-9266125bfb85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019c76f6-2bb5-778e-882f-708501ecd6a8" xlink:to="loc_us-gaap_HedgingDesignationDomain_019c76f6-2bb5-7fb3-be95-9266125bfb85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019c76f6-2bb5-79ab-9ce4-ec55224184b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019c76f6-2bb5-7fb3-be95-9266125bfb85" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019c76f6-2bb5-79ab-9ce4-ec55224184b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019c76f6-2bb5-733c-88d7-7814ab3065a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019c76f6-2bb5-7fb3-be95-9266125bfb85" xlink:to="loc_us-gaap_NondesignatedMember_019c76f6-2bb5-733c-88d7-7814ab3065a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_019c76f6-2bb5-78a0-bf79-582a0de44c39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019c76f6-2bb5-7253-bd9d-dc79b904ecf7" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_019c76f6-2bb5-78a0-bf79-582a0de44c39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_019c76f6-2bb5-793e-998f-d55d865bff5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019c76f6-2bb5-7253-bd9d-dc79b904ecf7" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral_019c76f6-2bb5-793e-998f-d55d865bff5f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/FairValueofFinancialInstrumentsScheduleofRemainingAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#FairValueofFinancialInstrumentsScheduleofRemainingAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/FairValueofFinancialInstrumentsScheduleofRemainingAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c76f6-2bb5-7326-b3f9-cdc742eb104a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c76f6-2bb5-7b1d-ba9a-9915e5444988" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019c76f6-2bb5-7326-b3f9-cdc742eb104a" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c76f6-2bb5-7b1d-ba9a-9915e5444988" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c76f6-2bb5-78d6-83ae-7f1fb1cd9e24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c76f6-2bb5-7b1d-ba9a-9915e5444988" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c76f6-2bb5-78d6-83ae-7f1fb1cd9e24" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-78d6-83ae-7f1fb1cd9e24_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c76f6-2bb5-78d6-83ae-7f1fb1cd9e24" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-78d6-83ae-7f1fb1cd9e24_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7f40-b1a6-83442be31af7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c76f6-2bb5-78d6-83ae-7f1fb1cd9e24" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7f40-b1a6-83442be31af7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019c76f6-2bb5-7097-ac7d-a6bca610b376" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7f40-b1a6-83442be31af7" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019c76f6-2bb5-7097-ac7d-a6bca610b376" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019c76f6-2bb5-77e7-9e27-67eb09bf4f70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7f40-b1a6-83442be31af7" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019c76f6-2bb5-77e7-9e27-67eb09bf4f70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019c76f6-2bb5-7d15-96c8-c84c1355bec1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7f40-b1a6-83442be31af7" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019c76f6-2bb5-7d15-96c8-c84c1355bec1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-72e5-ac93-15b7dbfe715c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c76f6-2bb5-7b1d-ba9a-9915e5444988" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-72e5-ac93-15b7dbfe715c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-72e5-ac93-15b7dbfe715c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-72e5-ac93-15b7dbfe715c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-72e5-ac93-15b7dbfe715c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7c75-b0a0-b8047d4372a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c76f6-2bb5-72e5-ac93-15b7dbfe715c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7c75-b0a0-b8047d4372a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019c76f6-2bb5-74cd-847e-038402f00674" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7c75-b0a0-b8047d4372a5" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019c76f6-2bb5-74cd-847e-038402f00674" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-7ddd-a275-b65c68986f52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7c75-b0a0-b8047d4372a5" xlink:to="loc_us-gaap_InterestRateSwapMember_019c76f6-2bb5-7ddd-a275-b65c68986f52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_ForeignCurrencyHedgeMember_019c76f6-2bb5-7a0c-a9b0-a6f3cc2132c4" xlink:href="scsc-20260331.xsd#scsc_ForeignCurrencyHedgeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c76f6-2bb5-7c75-b0a0-b8047d4372a5" xlink:to="loc_scsc_ForeignCurrencyHedgeMember_019c76f6-2bb5-7a0c-a9b0-a6f3cc2132c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019c76f6-2bb5-7892-8a35-aa549d17215f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c76f6-2bb5-7326-b3f9-cdc742eb104a" xlink:to="loc_us-gaap_AssetsAbstract_019c76f6-2bb5-7892-8a35-aa549d17215f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_019c76f6-2bb5-7dec-8a89-15532b3ff8a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019c76f6-2bb5-7892-8a35-aa549d17215f" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_019c76f6-2bb5-7dec-8a89-15532b3ff8a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019c76f6-2bb5-7588-8f24-6361097a6ce0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019c76f6-2bb5-7892-8a35-aa549d17215f" xlink:to="loc_us-gaap_DerivativeAssets_019c76f6-2bb5-7588-8f24-6361097a6ce0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019c76f6-2bb5-744a-8183-e6d0402f58ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019c76f6-2bb5-7892-8a35-aa549d17215f" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019c76f6-2bb5-744a-8183-e6d0402f58ac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_019c76f6-2bb5-7322-9e72-aef5bd8bbb3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c76f6-2bb5-7326-b3f9-cdc742eb104a" xlink:to="loc_us-gaap_LiabilitiesAbstract_019c76f6-2bb5-7322-9e72-aef5bd8bbb3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_019c76f6-2bb5-746b-8385-5e0878752b8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019c76f6-2bb5-7322-9e72-aef5bd8bbb3f" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_019c76f6-2bb5-746b-8385-5e0878752b8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019c76f6-2bb5-7f9e-8c81-60a5f2afb019" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019c76f6-2bb5-7322-9e72-aef5bd8bbb3f" xlink:to="loc_us-gaap_DerivativeLiabilities_019c76f6-2bb5-7f9e-8c81-60a5f2afb019" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019c76f6-2bb5-74a7-9f37-4d738f98b8ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019c76f6-2bb5-7322-9e72-aef5bd8bbb3f" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019c76f6-2bb5-74a7-9f37-4d738f98b8ec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019c76f6-2bb5-7c24-b125-95edcbf71d39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019c76f6-2bb5-7322-9e72-aef5bd8bbb3f" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019c76f6-2bb5-7c24-b125-95edcbf71d39" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/FairValueofFinancialInstrumentsScheduleofChangesinFairValueofContingentConsiderationsDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#FairValueofFinancialInstrumentsScheduleofChangesinFairValueofContingentConsiderationsDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/FairValueofFinancialInstrumentsScheduleofChangesinFairValueofContingentConsiderationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019c76f6-2bb5-7a94-a590-33ec0255c8c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019c76f6-2bb5-73ef-8d73-ba2d1cc1ca05" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019c76f6-2bb5-7a94-a590-33ec0255c8c2" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019c76f6-2bb5-73ef-8d73-ba2d1cc1ca05" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7267-97f6-7ac66e009df9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019c76f6-2bb5-73ef-8d73-ba2d1cc1ca05" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7267-97f6-7ac66e009df9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7267-97f6-7ac66e009df9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7267-97f6-7ac66e009df9" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7267-97f6-7ac66e009df9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7ddc-9805-3107d8344818" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7267-97f6-7ac66e009df9" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7ddc-9805-3107d8344818" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-7824-8e6d-6582049bbeb4" xlink:href="scsc-20260331.xsd#scsc_SpecialtyTechnologySolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7ddc-9805-3107d8344818" xlink:to="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-7824-8e6d-6582049bbeb4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-7bb5-919c-5941001f40b8" xlink:href="scsc-20260331.xsd#scsc_IntelisysAdvisoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7ddc-9805-3107d8344818" xlink:to="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-7bb5-919c-5941001f40b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019c76f6-2bb5-73c1-be62-1aa06b6d8ba2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019c76f6-2bb5-7a94-a590-33ec0255c8c2" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019c76f6-2bb5-73c1-be62-1aa06b6d8ba2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019c76f6-2bb5-734e-a11f-daf6b25951a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019c76f6-2bb5-73c1-be62-1aa06b6d8ba2" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019c76f6-2bb5-734e-a11f-daf6b25951a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_019c76f6-2bb5-784c-8fb5-07be86417abc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019c76f6-2bb5-73c1-be62-1aa06b6d8ba2" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_019c76f6-2bb5-784c-8fb5-07be86417abc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_019c76f6-2bb5-799e-809c-e6628164f56d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019c76f6-2bb5-73c1-be62-1aa06b6d8ba2" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_019c76f6-2bb5-799e-809c-e6628164f56d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_019c76f6-2bb5-74dd-a34a-6cc375754000" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019c76f6-2bb5-73c1-be62-1aa06b6d8ba2" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_019c76f6-2bb5-74dd-a34a-6cc375754000" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList_019c76f6-2bb5-7db5-a69c-32982ccd5ff2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_019c76f6-2bb5-74dd-a34a-6cc375754000" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList_019c76f6-2bb5-7db5-a69c-32982ccd5ff2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019c76f6-2bb5-755e-849c-03c2f62e2269" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/FairValueofFinancialInstrumentsNarrativeDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#FairValueofFinancialInstrumentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/FairValueofFinancialInstrumentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c76f6-2bb5-7ddd-a36a-79c70150d9cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c76f6-2bb5-7e80-b804-ddbf37ae3809" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c76f6-2bb5-7ddd-a36a-79c70150d9cd" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c76f6-2bb5-7e80-b804-ddbf37ae3809" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2bb5-72ee-9db9-056b35cf59a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c76f6-2bb5-7e80-b804-ddbf37ae3809" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2bb5-72ee-9db9-056b35cf59a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2bb5-72ee-9db9-056b35cf59a0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2bb5-72ee-9db9-056b35cf59a0" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2bb5-72ee-9db9-056b35cf59a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2bb5-7905-ab70-79baf7156174" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2bb5-72ee-9db9-056b35cf59a0" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2bb5-7905-ab70-79baf7156174" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_AdvantixMember_019c76f6-2bb5-7876-a53f-7823b234f07c" xlink:href="scsc-20260331.xsd#scsc_AdvantixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2bb5-7905-ab70-79baf7156174" xlink:to="loc_scsc_AdvantixMember_019c76f6-2bb5-7876-a53f-7823b234f07c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_DataXoomMember_019c76f6-2bb5-7fed-ab1f-7bd0f0bcac96" xlink:href="scsc-20260331.xsd#scsc_DataXoomMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2bb5-7905-ab70-79baf7156174" xlink:to="loc_scsc_DataXoomMember_019c76f6-2bb5-7fed-ab1f-7bd0f0bcac96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_ResourciveMember_019c76f6-2bb5-7235-8fd2-2682e3efbf59" xlink:href="scsc-20260331.xsd#scsc_ResourciveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2bb5-7905-ab70-79baf7156174" xlink:to="loc_scsc_ResourciveMember_019c76f6-2bb5-7235-8fd2-2682e3efbf59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c76f6-2bb5-7db7-b921-ca17ca99000f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c76f6-2bb5-7e80-b804-ddbf37ae3809" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c76f6-2bb5-7db7-b921-ca17ca99000f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7db7-b921-ca17ca99000f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c76f6-2bb5-7db7-b921-ca17ca99000f" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7db7-b921-ca17ca99000f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7370-99c7-07e90128d37b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c76f6-2bb5-7db7-b921-ca17ca99000f" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7370-99c7-07e90128d37b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019c76f6-2bb5-713f-8001-086f45fab6cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c76f6-2bb5-7370-99c7-07e90128d37b" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019c76f6-2bb5-713f-8001-086f45fab6cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7747-8502-899242472fa1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019c76f6-2bb5-7e80-b804-ddbf37ae3809" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7747-8502-899242472fa1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7747-8502-899242472fa1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7747-8502-899242472fa1" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7747-8502-899242472fa1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7641-b35f-80e28764b148" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7747-8502-899242472fa1" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7641-b35f-80e28764b148" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-73b8-bc46-55b0eb70e19d" xlink:href="scsc-20260331.xsd#scsc_SpecialtyTechnologySolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7641-b35f-80e28764b148" xlink:to="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-73b8-bc46-55b0eb70e19d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019c76f6-2bb5-7a4a-91c6-98981f4dbc9b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c76f6-2bb5-7ddd-a36a-79c70150d9cd" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_019c76f6-2bb5-7a4a-91c6-98981f4dbc9b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_019c76f6-2bb5-7c54-882d-cc4d5d02b786" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c76f6-2bb5-7ddd-a36a-79c70150d9cd" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_019c76f6-2bb5-7c54-882d-cc4d5d02b786" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_019c76f6-2bb5-7f58-a9f8-935a491261c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019c76f6-2bb5-7ddd-a36a-79c70150d9cd" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_019c76f6-2bb5-7f58-a9f8-935a491261c7" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/FairValueofFinancialInstrumentsScheduleofValuationTechniquesandSignificantObservableInputsDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#FairValueofFinancialInstrumentsScheduleofValuationTechniquesandSignificantObservableInputsDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/FairValueofFinancialInstrumentsScheduleofValuationTechniquesandSignificantObservableInputsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019c76f6-2bb5-7f71-9471-e7563e325bb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019c76f6-2bb5-7f63-aa9d-3fcb80aa9c1a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019c76f6-2bb5-7f71-9471-e7563e325bb8" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019c76f6-2bb5-7f63-aa9d-3fcb80aa9c1a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-72b0-a35f-25c619d4d1aa" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019c76f6-2bb5-7f63-aa9d-3fcb80aa9c1a" xlink:to="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-72b0-a35f-25c619d4d1aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-72b0-a35f-25c619d4d1aa_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-72b0-a35f-25c619d4d1aa" xlink:to="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-72b0-a35f-25c619d4d1aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-7f3f-8adb-1d19dfb6ad20" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-72b0-a35f-25c619d4d1aa" xlink:to="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-7f3f-8adb-1d19dfb6ad20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019c76f6-2bb5-71cc-91cf-0bd4333d76b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-7f3f-8adb-1d19dfb6ad20" xlink:to="loc_us-gaap_OperatingSegmentsMember_019c76f6-2bb5-71cc-91cf-0bd4333d76b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019c76f6-2bb5-7d9b-9ef2-bc3f04e513f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019c76f6-2bb5-7f63-aa9d-3fcb80aa9c1a" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019c76f6-2bb5-7d9b-9ef2-bc3f04e513f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019c76f6-2bb5-7d9b-9ef2-bc3f04e513f0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019c76f6-2bb5-7d9b-9ef2-bc3f04e513f0" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019c76f6-2bb5-7d9b-9ef2-bc3f04e513f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019c76f6-2bb5-7fd1-8cf1-3463f6e4dc02" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019c76f6-2bb5-7d9b-9ef2-bc3f04e513f0" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019c76f6-2bb5-7fd1-8cf1-3463f6e4dc02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_MeasurementInputWeightedAveragePayorCreditSpreadMember_019c76f6-2bb5-7e21-94da-ca031798b294" xlink:href="scsc-20260331.xsd#scsc_MeasurementInputWeightedAveragePayorCreditSpreadMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019c76f6-2bb5-7fd1-8cf1-3463f6e4dc02" xlink:to="loc_scsc_MeasurementInputWeightedAveragePayorCreditSpreadMember_019c76f6-2bb5-7e21-94da-ca031798b294" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_MeasurementInputEBITDARiskPremiumMember_019c76f6-2bb5-7e4d-9c37-4392abc166e4" xlink:href="scsc-20260331.xsd#scsc_MeasurementInputEBITDARiskPremiumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019c76f6-2bb5-7fd1-8cf1-3463f6e4dc02" xlink:to="loc_scsc_MeasurementInputEBITDARiskPremiumMember_019c76f6-2bb5-7e4d-9c37-4392abc166e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_MeasurementInputAdjustedEBITDAVolatilityMember_019c76f6-2bb5-7671-8ccc-8861631f9007" xlink:href="scsc-20260331.xsd#scsc_MeasurementInputAdjustedEBITDAVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019c76f6-2bb5-7fd1-8cf1-3463f6e4dc02" xlink:to="loc_scsc_MeasurementInputAdjustedEBITDAVolatilityMember_019c76f6-2bb5-7671-8ccc-8861631f9007" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-78c3-939c-518bcad4d7e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019c76f6-2bb5-7f63-aa9d-3fcb80aa9c1a" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-78c3-939c-518bcad4d7e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-78c3-939c-518bcad4d7e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-78c3-939c-518bcad4d7e9" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-78c3-939c-518bcad4d7e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7f63-80da-aa42cec6c35e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-78c3-939c-518bcad4d7e9" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7f63-80da-aa42cec6c35e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-770a-adfe-131a82728e35" xlink:href="scsc-20260331.xsd#scsc_SpecialtyTechnologySolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7f63-80da-aa42cec6c35e" xlink:to="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-770a-adfe-131a82728e35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-713c-82f4-76d87795de92" xlink:href="scsc-20260331.xsd#scsc_IntelisysAdvisoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7f63-80da-aa42cec6c35e" xlink:to="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-713c-82f4-76d87795de92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019c76f6-2bb5-74b1-bf69-7c85f2ae57bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019c76f6-2bb5-7f71-9471-e7563e325bb8" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019c76f6-2bb5-74b1-bf69-7c85f2ae57bd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/SegmentInformationFinancialInformationbySegmentDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#SegmentInformationFinancialInformationbySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/SegmentInformationFinancialInformationbySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-73ed-9684-f8da7c46d886" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-73ed-9684-f8da7c46d886" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-7fe8-8cf4-2663a87f2f08" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-73ed-9684-f8da7c46d886" xlink:to="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-7fe8-8cf4-2663a87f2f08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-7fe8-8cf4-2663a87f2f08_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-7fe8-8cf4-2663a87f2f08" xlink:to="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-7fe8-8cf4-2663a87f2f08_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-71e4-8590-faa9d5e8966a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-7fe8-8cf4-2663a87f2f08" xlink:to="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-71e4-8590-faa9d5e8966a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019c76f6-2bb5-7c3b-877f-d0d1fdc86edc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-71e4-8590-faa9d5e8966a" xlink:to="loc_us-gaap_OperatingSegmentsMember_019c76f6-2bb5-7c3b-877f-d0d1fdc86edc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019c76f6-2bb5-7470-b358-91934bedd010" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-71e4-8590-faa9d5e8966a" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019c76f6-2bb5-7470-b358-91934bedd010" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReportableGeographicalComponentsMember_019c76f6-2bb5-7c81-8302-664dfeddab57" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ReportableGeographicalComponentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-71e4-8590-faa9d5e8966a" xlink:to="loc_srt_ReportableGeographicalComponentsMember_019c76f6-2bb5-7c81-8302-664dfeddab57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_GeographyEliminationsMember_019c76f6-2bb5-77ec-a220-3e36bb1c031d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_GeographyEliminationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-71e4-8590-faa9d5e8966a" xlink:to="loc_srt_GeographyEliminationsMember_019c76f6-2bb5-77ec-a220-3e36bb1c031d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-719e-bbe1-4f7c095f501c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-73ed-9684-f8da7c46d886" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-719e-bbe1-4f7c095f501c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-719e-bbe1-4f7c095f501c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-719e-bbe1-4f7c095f501c" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-719e-bbe1-4f7c095f501c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-78ad-a3a5-6135a802b355" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-719e-bbe1-4f7c095f501c" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-78ad-a3a5-6135a802b355" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-79a2-a24e-97f9a598d813" xlink:href="scsc-20260331.xsd#scsc_SpecialtyTechnologySolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-78ad-a3a5-6135a802b355" xlink:to="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-79a2-a24e-97f9a598d813" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-78bb-b997-1da99cdf7bb9" xlink:href="scsc-20260331.xsd#scsc_IntelisysAdvisoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-78ad-a3a5-6135a802b355" xlink:to="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-78bb-b997-1da99cdf7bb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019c76f6-2bb5-7846-b51d-0156472afa7f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-73ed-9684-f8da7c46d886" xlink:to="loc_srt_StatementGeographicalAxis_019c76f6-2bb5-7846-b51d-0156472afa7f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-7846-b51d-0156472afa7f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019c76f6-2bb5-7846-b51d-0156472afa7f" xlink:to="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-7846-b51d-0156472afa7f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-70bf-b4c0-4264a71b97f4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019c76f6-2bb5-7846-b51d-0156472afa7f" xlink:to="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-70bf-b4c0-4264a71b97f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019c76f6-2bb5-7639-9122-cd9c7d49648a" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-70bf-b4c0-4264a71b97f4" xlink:to="loc_country_US_019c76f6-2bb5-7639-9122-cd9c7d49648a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_BR_019c76f6-2bb5-79bf-8eb2-252e7123495c" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_BR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-70bf-b4c0-4264a71b97f4" xlink:to="loc_country_BR_019c76f6-2bb5-79bf-8eb2-252e7123495c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c76f6-2bb5-7584-bd2c-3043d7022d44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c76f6-2bb5-7584-bd2c-3043d7022d44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019c76f6-2bb5-78be-963b-798846e97247" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019c76f6-2bb5-78be-963b-798846e97247" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019c76f6-2bb5-7a12-9103-2255104008d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:to="loc_us-gaap_GrossProfit_019c76f6-2bb5-7a12-9103-2255104008d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_019c76f6-2bb5-7419-b5bf-10c5de29b2de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_019c76f6-2bb5-7419-b5bf-10c5de29b2de" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019c76f6-2bb5-74a5-a4f3-7ebf7414d637" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:to="loc_us-gaap_OperatingIncomeLoss_019c76f6-2bb5-74a5-a4f3-7ebf7414d637" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_019c76f6-2bb5-7ff1-86e1-2bf7dcc070be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:to="loc_us-gaap_DepreciationAndAmortization_019c76f6-2bb5-7ff1-86e1-2bf7dcc070be" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_019c76f6-2bb5-70cb-9940-344d29b96141" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_019c76f6-2bb5-70cb-9940-344d29b96141" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_019c76f6-2bb5-79c0-90b0-2fbba3ab46b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7a5b-a3ed-172a897f7392" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_019c76f6-2bb5-79c0-90b0-2fbba3ab46b0" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/SegmentInformationAssetsBySegmentDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#SegmentInformationAssetsBySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/SegmentInformationAssetsBySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7e96-8805-8d7f8ec7c7e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-76b9-ae44-234447614b7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7e96-8805-8d7f8ec7c7e0" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-76b9-ae44-234447614b7a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-78db-90f3-b41be0f0a7db" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-76b9-ae44-234447614b7a" xlink:to="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-78db-90f3-b41be0f0a7db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-78db-90f3-b41be0f0a7db_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-78db-90f3-b41be0f0a7db" xlink:to="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-78db-90f3-b41be0f0a7db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-76a9-a35f-27ca4fbdc98e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019c76f6-2bb5-78db-90f3-b41be0f0a7db" xlink:to="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-76a9-a35f-27ca4fbdc98e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019c76f6-2bb5-7f3d-9d85-9d01b48a6fac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c76f6-2bb5-76a9-a35f-27ca4fbdc98e" xlink:to="loc_us-gaap_OperatingSegmentsMember_019c76f6-2bb5-7f3d-9d85-9d01b48a6fac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7f66-860c-fef7b170f63b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-76b9-ae44-234447614b7a" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7f66-860c-fef7b170f63b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7f66-860c-fef7b170f63b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7f66-860c-fef7b170f63b" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7f66-860c-fef7b170f63b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7dc7-ba3a-a73ea5e17183" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c76f6-2bb5-7f66-860c-fef7b170f63b" xlink:to="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7dc7-ba3a-a73ea5e17183" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-7b3a-9566-4351f58e60e2" xlink:href="scsc-20260331.xsd#scsc_SpecialtyTechnologySolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7dc7-ba3a-a73ea5e17183" xlink:to="loc_scsc_SpecialtyTechnologySolutionsMember_019c76f6-2bb5-7b3a-9566-4351f58e60e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-7303-a93f-99348843735e" xlink:href="scsc-20260331.xsd#scsc_IntelisysAdvisoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c76f6-2bb5-7dc7-ba3a-a73ea5e17183" xlink:to="loc_scsc_IntelisysAdvisoryMember_019c76f6-2bb5-7303-a93f-99348843735e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019c76f6-2bb5-7f2d-84a0-a16072318618" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c76f6-2bb5-76b9-ae44-234447614b7a" xlink:to="loc_srt_StatementGeographicalAxis_019c76f6-2bb5-7f2d-84a0-a16072318618" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-7f2d-84a0-a16072318618_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019c76f6-2bb5-7f2d-84a0-a16072318618" xlink:to="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-7f2d-84a0-a16072318618_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-70dc-bbe4-c8787473357b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019c76f6-2bb5-7f2d-84a0-a16072318618" xlink:to="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-70dc-bbe4-c8787473357b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019c76f6-2bb5-7437-ac44-5dc62df77f8c" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-70dc-bbe4-c8787473357b" xlink:to="loc_country_US_019c76f6-2bb5-7437-ac44-5dc62df77f8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_BR_019c76f6-2bb5-7ffa-9cb5-a18615bcac5b" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_BR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019c76f6-2bb5-70dc-bbe4-c8787473357b" xlink:to="loc_country_BR_019c76f6-2bb5-7ffa-9cb5-a18615bcac5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019c76f6-2bb5-70b3-86ed-030b2e5f7a5e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7e96-8805-8d7f8ec7c7e0" xlink:to="loc_us-gaap_Assets_019c76f6-2bb5-70b3-86ed-030b2e5f7a5e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019c76f6-2bb5-73a3-8ca2-b39d5b0bf058" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c76f6-2bb5-7e96-8805-8d7f8ec7c7e0" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019c76f6-2bb5-73a3-8ca2-b39d5b0bf058" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#LeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/LeasesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c76f6-2bb5-78c6-b6d9-eb1f814b8c17" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019c76f6-2bb5-7b3e-9dad-e3f0fdc8a92e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c76f6-2bb5-78c6-b6d9-eb1f814b8c17" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019c76f6-2bb5-7b3e-9dad-e3f0fdc8a92e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c76f6-2bb5-7605-b389-082035ba3bbb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019c76f6-2bb5-7b3e-9dad-e3f0fdc8a92e" xlink:to="loc_srt_RangeAxis_019c76f6-2bb5-7605-b389-082035ba3bbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c76f6-2bb5-7605-b389-082035ba3bbb_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c76f6-2bb5-7605-b389-082035ba3bbb" xlink:to="loc_srt_RangeMember_019c76f6-2bb5-7605-b389-082035ba3bbb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c76f6-2bb5-79fc-8c51-d7f14d66a766" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c76f6-2bb5-7605-b389-082035ba3bbb" xlink:to="loc_srt_RangeMember_019c76f6-2bb5-79fc-8c51-d7f14d66a766" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c76f6-2bb5-7c6f-9c21-2b0f7a99cdd4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c76f6-2bb5-79fc-8c51-d7f14d66a766" xlink:to="loc_srt_MinimumMember_019c76f6-2bb5-7c6f-9c21-2b0f7a99cdd4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c76f6-2bb5-7a53-920c-c89751362d99" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c76f6-2bb5-79fc-8c51-d7f14d66a766" xlink:to="loc_srt_MaximumMember_019c76f6-2bb5-7a53-920c-c89751362d99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019c76f6-2bb5-7436-b639-bc7f8596c54f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c76f6-2bb5-78c6-b6d9-eb1f814b8c17" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019c76f6-2bb5-7436-b639-bc7f8596c54f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/CommitmentsandContingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_019c76f6-2c74-713c-b945-e3c3c5172e1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_019c76f6-2c74-7ba8-a144-06624dfbaa96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019c76f6-2c74-713c-b945-e3c3c5172e1c" xlink:to="loc_us-gaap_OtherCommitmentsTable_019c76f6-2c74-7ba8-a144-06624dfbaa96" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2c74-771d-9abf-6dba06bc6a0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019c76f6-2c74-7ba8-a144-06624dfbaa96" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2c74-771d-9abf-6dba06bc6a0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-771d-9abf-6dba06bc6a0a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2c74-771d-9abf-6dba06bc6a0a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-771d-9abf-6dba06bc6a0a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-7a00-b636-7f70161aa38a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2c74-771d-9abf-6dba06bc6a0a" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-7a00-b636-7f70161aa38a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_Network1Member_019c76f6-2c74-7c2f-a805-6190c9bce2cb" xlink:href="scsc-20260331.xsd#scsc_Network1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-7a00-b636-7f70161aa38a" xlink:to="loc_scsc_Network1Member_019c76f6-2c74-7c2f-a805-6190c9bce2cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_BusinessAcquisitionsEscrowDeposits_019c76f6-2c74-76c7-836e-9cd3ef111f01" xlink:href="scsc-20260331.xsd#scsc_BusinessAcquisitionsEscrowDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019c76f6-2c74-713c-b945-e3c3c5172e1c" xlink:to="loc_scsc_BusinessAcquisitionsEscrowDeposits_019c76f6-2c74-76c7-836e-9cd3ef111f01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_BusinessAcquisitionsEscrowDepositsAmountReleased_019c76f6-2c74-7685-a7ee-0550e7bb1800" xlink:href="scsc-20260331.xsd#scsc_BusinessAcquisitionsEscrowDepositsAmountReleased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019c76f6-2c74-713c-b945-e3c3c5172e1c" xlink:to="loc_scsc_BusinessAcquisitionsEscrowDepositsAmountReleased_019c76f6-2c74-7685-a7ee-0550e7bb1800" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_BusinessAcquisitionCostOfAcquiredEntityCashHeldInEscrow_019c76f6-2c74-788c-a8f7-bd6091f545ba" xlink:href="scsc-20260331.xsd#scsc_BusinessAcquisitionCostOfAcquiredEntityCashHeldInEscrow"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019c76f6-2c74-713c-b945-e3c3c5172e1c" xlink:to="loc_scsc_BusinessAcquisitionCostOfAcquiredEntityCashHeldInEscrow_019c76f6-2c74-788c-a8f7-bd6091f545ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019c76f6-2c74-7403-bdac-c6a757e8d0fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019c76f6-2c74-713c-b945-e3c3c5172e1c" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_019c76f6-2c74-7403-bdac-c6a757e8d0fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_BusinessCombinationIndemnificationAssetsAndContingentConsiderationLiabilitiesRangeOfOutcomesValueLow_019c76f6-2c74-776b-bf7d-89c6a69b7489" xlink:href="scsc-20260331.xsd#scsc_BusinessCombinationIndemnificationAssetsAndContingentConsiderationLiabilitiesRangeOfOutcomesValueLow"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019c76f6-2c74-713c-b945-e3c3c5172e1c" xlink:to="loc_scsc_BusinessCombinationIndemnificationAssetsAndContingentConsiderationLiabilitiesRangeOfOutcomesValueLow_019c76f6-2c74-776b-bf7d-89c6a69b7489" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_BusinessCombinationIndemnificationAssetsAndContingentConsiderationLiabilitiesRangeOfOutcomesValueHigh_019c76f6-2c74-7c4f-879e-cbc97395e9f6" xlink:href="scsc-20260331.xsd#scsc_BusinessCombinationIndemnificationAssetsAndContingentConsiderationLiabilitiesRangeOfOutcomesValueHigh"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019c76f6-2c74-713c-b945-e3c3c5172e1c" xlink:to="loc_scsc_BusinessCombinationIndemnificationAssetsAndContingentConsiderationLiabilitiesRangeOfOutcomesValueHigh_019c76f6-2c74-7c4f-879e-cbc97395e9f6" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.scansource.com/role/BusinessAcquisitionsDetails" xlink:type="simple" xlink:href="scsc-20260331.xsd#BusinessAcquisitionsDetails"/>
  <link:definitionLink xlink:role="http://www.scansource.com/role/BusinessAcquisitionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019c76f6-2c74-703f-8922-3ae8a6fe7fdb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019c76f6-2c74-7137-a08b-3c15f4c10728" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019c76f6-2c74-703f-8922-3ae8a6fe7fdb" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019c76f6-2c74-7137-a08b-3c15f4c10728" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2c74-7b3b-b11d-27eb30322909" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_019c76f6-2c74-7137-a08b-3c15f4c10728" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2c74-7b3b-b11d-27eb30322909" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-7b3b-b11d-27eb30322909_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2c74-7b3b-b11d-27eb30322909" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-7b3b-b11d-27eb30322909_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-7d85-9eef-d26d7609d47a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019c76f6-2c74-7b3b-b11d-27eb30322909" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-7d85-9eef-d26d7609d47a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_ResourciveAdvantixAndDataXoomMember_019c76f6-2c74-72a2-9738-c5ee9683e89f" xlink:href="scsc-20260331.xsd#scsc_ResourciveAdvantixAndDataXoomMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-7d85-9eef-d26d7609d47a" xlink:to="loc_scsc_ResourciveAdvantixAndDataXoomMember_019c76f6-2c74-72a2-9738-c5ee9683e89f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_DataXoomMember_019c76f6-2c74-7c6d-92f6-be42d6e95cd1" xlink:href="scsc-20260331.xsd#scsc_DataXoomMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019c76f6-2c74-7d85-9eef-d26d7609d47a" xlink:to="loc_scsc_DataXoomMember_019c76f6-2c74-7c6d-92f6-be42d6e95cd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019c76f6-2c74-7ef5-9044-b3f2fc5f8b41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019c76f6-2c74-703f-8922-3ae8a6fe7fdb" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019c76f6-2c74-7ef5-9044-b3f2fc5f8b41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_scsc_BusinessCombinationConsiderationTransferredWorkingCapitalAdjustmentReceived_019daf5f-d9cf-7a5e-a10d-b3068d1615c2" xlink:href="scsc-20260331.xsd#scsc_BusinessCombinationConsiderationTransferredWorkingCapitalAdjustmentReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019c76f6-2c74-703f-8922-3ae8a6fe7fdb" xlink:to="loc_scsc_BusinessCombinationConsiderationTransferredWorkingCapitalAdjustmentReceived_019daf5f-d9cf-7a5e-a10d-b3068d1615c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019c76f6-2c74-7286-b8a4-c6ad2ed74ceb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019c76f6-2c74-703f-8922-3ae8a6fe7fdb" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019c76f6-2c74-7286-b8a4-c6ad2ed74ceb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019c76f6-2c74-7ef0-ae19-15665d36be0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019c76f6-2c74-703f-8922-3ae8a6fe7fdb" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019c76f6-2c74-7ef0-ae19-15665d36be0c" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:type="arc" order="691"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_OtherAssetsNoncurrent" xlink:type="arc" order="101"/>
  </link:definitionLink>
</link:linkbase>
