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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cfbf6-4268-72f5-8db6-6ec3a7883d82,g:50ea373a-b845-40af-ad11-7f5faba3c2dd-->
<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.bbt.com/role/UnauditedConsolidatedBalanceSheets" xlink:type="simple" xlink:href="bbt-20260331.xsd#UnauditedConsolidatedBalanceSheets"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/UnauditedConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019d206e-8faf-72bd-8473-aecc9260b095" 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_019d206e-8faf-72d1-ad06-d35750d4a845" 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_019d206e-8faf-72bd-8473-aecc9260b095" xlink:to="loc_us-gaap_StatementTable_019d206e-8faf-72d1-ad06-d35750d4a845" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019d206e-8faf-7267-87f5-83ec8d2c74fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019d206e-8faf-72d1-ad06-d35750d4a845" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019d206e-8faf-7267-87f5-83ec8d2c74fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019d206e-8faf-7267-87f5-83ec8d2c74fd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019d206e-8faf-7267-87f5-83ec8d2c74fd" xlink:to="loc_us-gaap_ReceivableTypeDomain_019d206e-8faf-7267-87f5-83ec8d2c74fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_019d206e-8faf-7b74-bd87-477d1f3770b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_019d206e-8faf-7267-87f5-83ec8d2c74fd" xlink:to="loc_us-gaap_ReceivableTypeDomain_019d206e-8faf-7b74-bd87-477d1f3770b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019d206e-8faf-7737-9b7d-4c7fa73ea105" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019d206e-8faf-7b74-bd87-477d1f3770b4" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019d206e-8faf-7737-9b7d-4c7fa73ea105" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019d206e-8faf-78cc-9e62-6ef450395a51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019d206e-8faf-7b74-bd87-477d1f3770b4" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019d206e-8faf-78cc-9e62-6ef450395a51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019d206e-8faf-7c13-9401-cfc0bae72a5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_019d206e-8faf-7b74-bd87-477d1f3770b4" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019d206e-8faf-7c13-9401-cfc0bae72a5a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" 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_019d206e-8faf-72bd-8473-aecc9260b095" xlink:to="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndDueFromBanks_019d206e-8faf-780a-970f-f52200bb832f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndDueFromBanks"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_CashAndDueFromBanks_019d206e-8faf-780a-970f-f52200bb832f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsAtCarryingValue_019d206e-8faf-7dc1-ba23-8d48445d1727" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_CashEquivalentsAtCarryingValue_019d206e-8faf-7dc1-ba23-8d48445d1727" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019d206e-8faf-7446-b600-c90b07461ebe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019d206e-8faf-7446-b600-c90b07461ebe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019d206e-8faf-771b-9076-32bbfa6bcb98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019d206e-8faf-771b-9076-32bbfa6bcb98" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_TotalSecurities_019d206e-8faf-7c50-9d09-cb6c12186575" xlink:href="bbt-20260331.xsd#bbt_TotalSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_bbt_TotalSecurities_019d206e-8faf-7c50-9d09-cb6c12186575" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_019d206e-8faf-7637-9d1f-069a8b01f859" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_019d206e-8faf-7637-9d1f-069a8b01f859" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_TotalSecuritiesNet_019d206e-8faf-713f-aaf6-694aa7aa8ae4" xlink:href="bbt-20260331.xsd#bbt_TotalSecuritiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_bbt_TotalSecuritiesNet_019d206e-8faf-713f-aaf6-694aa7aa8ae4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossAbstract_019d665f-7f8c-7988-a66e-6ffc3997250a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossAbstract_019d665f-7f8c-7988-a66e-6ffc3997250a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019d206e-8faf-7012-8b77-8969be69d6a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossAbstract_019d665f-7f8c-7988-a66e-6ffc3997250a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019d206e-8faf-7012-8b77-8969be69d6a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019d206e-8faf-7db4-8aeb-8fcff2733e29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossAbstract_019d665f-7f8c-7988-a66e-6ffc3997250a" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019d206e-8faf-7db4-8aeb-8fcff2733e29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019d206e-8faf-7422-a367-087908556f97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossAbstract_019d665f-7f8c-7988-a66e-6ffc3997250a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019d206e-8faf-7422-a367-087908556f97" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedInvestments_019d206e-8faf-7768-8382-4a4795b285ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_RestrictedInvestments_019d206e-8faf-7768-8382-4a4795b285ed" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019d206e-8faf-78ea-86c2-3e6c54360572" 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_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019d206e-8faf-78ea-86c2-3e6c54360572" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019d206e-8faf-7c7b-9320-f9cbece791a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019d206e-8faf-7c7b-9320-f9cbece791a7" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_019d206e-8faf-7bb8-96a7-0d76619026d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_019d206e-8faf-7bb8-96a7-0d76619026d1" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019d206e-8faf-7d19-9835-fa6e3e2912c5" 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_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_Goodwill_019d206e-8faf-7d19-9835-fa6e3e2912c5" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019d206e-8faf-7369-9f1d-a0fa4a4f47b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019d206e-8faf-7369-9f1d-a0fa4a4f47b1" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRealEstateAndForeclosedAssets_019d206e-8faf-7c29-be1a-0c8af34b1851" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherRealEstateAndForeclosedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_OtherRealEstateAndForeclosedAssets_019d206e-8faf-7c29-be1a-0c8af34b1851" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashSurrenderValueOfLifeInsurance_019d206e-8faf-73e4-852f-2eee3efab10a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashSurrenderValueOfLifeInsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_CashSurrenderValueOfLifeInsurance_019d206e-8faf-73e4-852f-2eee3efab10a" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019d206e-8faf-7858-bafa-6020d12aadff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_OtherAssets_019d206e-8faf-7858-bafa-6020d12aadff" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019d206e-8faf-76f4-bac9-1394e14ef078" 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_AssetsAbstract_019d206e-8faf-7a2f-9a43-e1379c8d0af3" xlink:to="loc_us-gaap_Assets_019d206e-8faf-76f4-bac9-1394e14ef078" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019d206e-8faf-72bd-8473-aecc9260b095" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsAbstract_019d206e-8faf-7bff-9c5c-1641a63fad12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:to="loc_us-gaap_DepositsAbstract_019d206e-8faf-7bff-9c5c-1641a63fad12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DemandDepositAccounts_019d206e-8faf-717b-aff9-bfe75eaf5ddb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DemandDepositAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepositsAbstract_019d206e-8faf-7bff-9c5c-1641a63fad12" xlink:to="loc_us-gaap_DemandDepositAccounts_019d206e-8faf-717b-aff9-bfe75eaf5ddb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_019d206e-8faf-748c-8ec6-79e2d83e01f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepositsAbstract_019d206e-8faf-7bff-9c5c-1641a63fad12" xlink:to="loc_us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_019d206e-8faf-748c-8ec6-79e2d83e01f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsNegotiableOrderOfWithdrawalNOW_019d206e-8faf-72c2-aa5c-057d02ad33b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositsNegotiableOrderOfWithdrawalNOW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_019d206e-8faf-748c-8ec6-79e2d83e01f1" xlink:to="loc_us-gaap_DepositsNegotiableOrderOfWithdrawalNOW_019d206e-8faf-72c2-aa5c-057d02ad33b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsSavingsDeposits_019d206e-8faf-744e-b8e8-a590bb9bbe11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositsSavingsDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_019d206e-8faf-748c-8ec6-79e2d83e01f1" xlink:to="loc_us-gaap_DepositsSavingsDeposits_019d206e-8faf-744e-b8e8-a590bb9bbe11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsMoneyMarketDeposits_019d206e-8faf-7c32-9bc5-90eaa7c8564f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositsMoneyMarketDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_019d206e-8faf-748c-8ec6-79e2d83e01f1" xlink:to="loc_us-gaap_DepositsMoneyMarketDeposits_019d206e-8faf-7c32-9bc5-90eaa7c8564f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DepositsPayrollDeposits_019dd705-7b17-7bd6-9e5b-a02c8351168b" xlink:href="bbt-20260331.xsd#bbt_DepositsPayrollDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_019d206e-8faf-748c-8ec6-79e2d83e01f1" xlink:to="loc_bbt_DepositsPayrollDeposits_019dd705-7b17-7bd6-9e5b-a02c8351168b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDomesticDepositCertificatesOfDeposits_019d206e-8faf-75ba-a031-1cc8a1ffb18d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestBearingDomesticDepositCertificatesOfDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_019d206e-8faf-748c-8ec6-79e2d83e01f1" xlink:to="loc_us-gaap_InterestBearingDomesticDepositCertificatesOfDeposits_019d206e-8faf-75ba-a031-1cc8a1ffb18d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DepositsBrokeredDeposits_019d206e-8faf-799e-8931-10a9471711eb" xlink:href="bbt-20260331.xsd#bbt_DepositsBrokeredDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_019d206e-8faf-748c-8ec6-79e2d83e01f1" xlink:to="loc_bbt_DepositsBrokeredDeposits_019d206e-8faf-799e-8931-10a9471711eb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestBearingDepositLiabilities_019d206e-8faf-709f-b1ef-fdde5680d2c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestBearingDepositLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestBearingDepositLiabilitiesByComponentAbstract_019d206e-8faf-748c-8ec6-79e2d83e01f1" xlink:to="loc_us-gaap_InterestBearingDepositLiabilities_019d206e-8faf-709f-b1ef-fdde5680d2c0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Deposits_019d206e-8faf-71fa-b137-9e62d478781f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Deposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DepositsAbstract_019d206e-8faf-7bff-9c5c-1641a63fad12" xlink:to="loc_us-gaap_Deposits_019d206e-8faf-71fa-b137-9e62d478781f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAbstract_019d206e-8faf-7e82-b8ac-bb060371d97b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:to="loc_us-gaap_LongTermDebtAbstract_019d206e-8faf-7e82-b8ac-bb060371d97b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesLongTerm_019d206e-8faf-7283-80f5-f9b89e9f9e6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FederalHomeLoanBankAdvancesLongTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtAbstract_019d206e-8faf-7e82-b8ac-bb060371d97b" xlink:to="loc_us-gaap_FederalHomeLoanBankAdvancesLongTerm_019d206e-8faf-7283-80f5-f9b89e9f9e6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubordinatedDebt_019d206e-8faf-7096-9592-0c71004e6b3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtAbstract_019d206e-8faf-7e82-b8ac-bb060371d97b" xlink:to="loc_us-gaap_SubordinatedDebt_019d206e-8faf-7096-9592-0c71004e6b3f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherBorrowings_019d206e-8faf-77f1-90e0-ae6c5076f374" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtAbstract_019d206e-8faf-7e82-b8ac-bb060371d97b" xlink:to="loc_us-gaap_OtherBorrowings_019d206e-8faf-77f1-90e0-ae6c5076f374" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019d206e-8faf-73b8-a2ea-1685a401ba4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtAbstract_019d206e-8faf-7e82-b8ac-bb060371d97b" xlink:to="loc_us-gaap_LongTermDebt_019d206e-8faf-73b8-a2ea-1685a401ba4c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019d206e-8faf-7b1b-afe9-a6b0757d9725" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:to="loc_us-gaap_OperatingLeaseLiability_019d206e-8faf-7b1b-afe9-a6b0757d9725" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffBalanceSheetCreditLossLiability_019d206e-8faf-700f-8725-5c9f4add5586" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffBalanceSheetCreditLossLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:to="loc_us-gaap_OffBalanceSheetCreditLossLiability_019d206e-8faf-700f-8725-5c9f4add5586" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_019d206e-8faf-7439-8d1e-22f26a9bd7c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:to="loc_us-gaap_AccruedLiabilitiesAndOtherLiabilities_019d206e-8faf-7439-8d1e-22f26a9bd7c0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019d206e-8faf-7bb0-8e44-31382c503d33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:to="loc_us-gaap_Liabilities_019d206e-8faf-7bb0-8e44-31382c503d33" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019d206e-8faf-7102-815b-12f54116c3c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019d206e-8faf-7102-815b-12f54116c3c1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_019d206e-8faf-72dc-98fd-c1ee2e7db0b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_019d206e-8faf-72dc-98fd-c1ee2e7db0b2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019d206e-8faf-7d78-8210-ac15c5ab3567" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_019d206e-8faf-72dc-98fd-c1ee2e7db0b2" xlink:to="loc_us-gaap_CommonStockValue_019d206e-8faf-7d78-8210-ac15c5ab3567" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019d206e-8faf-7b9f-8b26-f356eafddcae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_019d206e-8faf-72dc-98fd-c1ee2e7db0b2" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_019d206e-8faf-7b9f-8b26-f356eafddcae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019d206e-8faf-70f3-b287-aec32324922f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_019d206e-8faf-72dc-98fd-c1ee2e7db0b2" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019d206e-8faf-70f3-b287-aec32324922f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019d206e-8faf-7f4d-abae-2fb88e27d82a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_019d206e-8faf-72dc-98fd-c1ee2e7db0b2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019d206e-8faf-7f4d-abae-2fb88e27d82a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonValue_019d206e-8faf-71a7-8895-3104ea988e12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_019d206e-8faf-72dc-98fd-c1ee2e7db0b2" xlink:to="loc_us-gaap_TreasuryStockCommonValue_019d206e-8faf-71a7-8895-3104ea988e12" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019d206e-8faf-75b3-9dfe-c3bdbd3a784a" 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_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_019d206e-8faf-72dc-98fd-c1ee2e7db0b2" xlink:to="loc_us-gaap_StockholdersEquity_019d206e-8faf-75b3-9dfe-c3bdbd3a784a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019d206e-8faf-7c02-b28b-0a0b6fe939d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019d206e-8faf-7bdc-9d0b-f1ac21e625c2" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_019d206e-8faf-7c02-b28b-0a0b6fe939d8" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/UnauditedConsolidatedStatementsofIncome" xlink:type="simple" xlink:href="bbt-20260331.xsd#UnauditedConsolidatedStatementsofIncome"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/UnauditedConsolidatedStatementsofIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" 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_019cfbf6-499b-71fb-8ca9-0c77d2f5a8ce" 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_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_StatementTable_019cfbf6-499b-71fb-8ca9-0c77d2f5a8ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019cfbf6-499b-78ba-8e6c-5125197a3729" 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_StatementTable_019cfbf6-499b-71fb-8ca9-0c77d2f5a8ce" xlink:to="loc_srt_ProductOrServiceAxis_019cfbf6-499b-78ba-8e6c-5125197a3729" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cfbf6-499b-78ba-8e6c-5125197a3729_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_019cfbf6-499b-78ba-8e6c-5125197a3729" xlink:to="loc_srt_ProductsAndServicesDomain_019cfbf6-499b-78ba-8e6c-5125197a3729_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cfbf6-499b-7c3f-b038-09c9473f4063" 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_019cfbf6-499b-78ba-8e6c-5125197a3729" xlink:to="loc_srt_ProductsAndServicesDomain_019cfbf6-499b-7c3f-b038-09c9473f4063" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositAccountMember_019cfbf6-499b-7855-a3fd-89d581ecef4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepositAccountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cfbf6-499b-7c3f-b038-09c9473f4063" xlink:to="loc_us-gaap_DepositAccountMember_019cfbf6-499b-7855-a3fd-89d581ecef4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialServiceOtherMember_019cfbf6-499b-7556-b202-ff65c16ffa6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cfbf6-499b-7c3f-b038-09c9473f4063" xlink:to="loc_us-gaap_FinancialServiceOtherMember_019cfbf6-499b-7556-b202-ff65c16ffa6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_WealthManagementFeesMember_019cfbf6-499b-7de0-ace3-e3fb85dd72c4" xlink:href="bbt-20260331.xsd#bbt_WealthManagementFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cfbf6-499b-7c3f-b038-09c9473f4063" xlink:to="loc_bbt_WealthManagementFeesMember_019cfbf6-499b-7de0-ace3-e3fb85dd72c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_019cfbf6-499b-775e-b409-f3f211dd88a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperatingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_019cfbf6-499b-775e-b409-f3f211dd88a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_019cfbf6-499b-7038-980d-8a39457b28bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndFeeIncomeLoansAndLeases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_019cfbf6-499b-775e-b409-f3f211dd88a2" xlink:to="loc_us-gaap_InterestAndFeeIncomeLoansAndLeases_019cfbf6-499b-7038-980d-8a39457b28bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_InterestIncomeDebtSecurities_019cfbf6-499b-7d92-ac86-7a338990ac73" xlink:href="bbt-20260331.xsd#bbt_InterestIncomeDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_019cfbf6-499b-775e-b409-f3f211dd88a2" xlink:to="loc_bbt_InterestIncomeDebtSecurities_019cfbf6-499b-7d92-ac86-7a338990ac73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_InterestAndDividendIncomeRestrictedEquitySecurities_019cfbf6-499b-7570-a644-78254e83aa4e" xlink:href="bbt-20260331.xsd#bbt_InterestAndDividendIncomeRestrictedEquitySecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_019cfbf6-499b-775e-b409-f3f211dd88a2" xlink:to="loc_bbt_InterestAndDividendIncomeRestrictedEquitySecurities_019cfbf6-499b-7570-a644-78254e83aa4e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_InterestAndDividendIncomeShortTermInvestment_019cfbf6-499b-7c50-8a72-fa0d8f2c44be" xlink:href="bbt-20260331.xsd#bbt_InterestAndDividendIncomeShortTermInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_019cfbf6-499b-775e-b409-f3f211dd88a2" xlink:to="loc_bbt_InterestAndDividendIncomeShortTermInvestment_019cfbf6-499b-7c50-8a72-fa0d8f2c44be" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDividendIncomeOperating_019cfbf6-499b-7d54-9e2a-3005b6ddf31d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestAndDividendIncomeOperatingAbstract_019cfbf6-499b-775e-b409-f3f211dd88a2" xlink:to="loc_us-gaap_InterestAndDividendIncomeOperating_019cfbf6-499b-7d54-9e2a-3005b6ddf31d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseAbstract_019cfbf6-499b-7b82-9899-9c22f4b64240" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_InterestExpenseAbstract_019cfbf6-499b-7b82-9899-9c22f4b64240" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_InterestExpenseDepositsExcludingBrokeredDeposits_019cfbf6-499b-77cd-9e67-72a00c994234" xlink:href="bbt-20260331.xsd#bbt_InterestExpenseDepositsExcludingBrokeredDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_019cfbf6-499b-7b82-9899-9c22f4b64240" xlink:to="loc_bbt_InterestExpenseDepositsExcludingBrokeredDeposits_019cfbf6-499b-77cd-9e67-72a00c994234" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseBorrowings_019cfbf6-499b-7188-b46e-7679503c7361" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_019cfbf6-499b-7b82-9899-9c22f4b64240" xlink:to="loc_us-gaap_InterestExpenseBorrowings_019cfbf6-499b-7188-b46e-7679503c7361" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseOperating_019cfbf6-499b-7d00-bf83-d9f14d78bd10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InterestExpenseAbstract_019cfbf6-499b-7b82-9899-9c22f4b64240" xlink:to="loc_us-gaap_InterestExpenseOperating_019cfbf6-499b-7d00-bf83-d9f14d78bd10" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_019cfbf6-499b-7a81-9e4e-6c51caf39cc3" 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_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_019cfbf6-499b-7a81-9e4e-6c51caf39cc3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_ProvisionCreditForCreditLossesOnLoans_019cfbf6-499b-7ff8-98b7-5950f272b426" xlink:href="bbt-20260331.xsd#bbt_ProvisionCreditForCreditLossesOnLoans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_bbt_ProvisionCreditForCreditLossesOnLoans_019cfbf6-499b-7ff8-98b7-5950f272b426" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossNotPreviouslyRecorded_019cfbf6-499b-7cdc-9ce9-bd6e627f6727" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossNotPreviouslyRecorded"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterestAllowanceForCreditLossNotPreviouslyRecorded_019cfbf6-499b-7cdc-9ce9-bd6e627f6727" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019cfbf6-499b-7541-a6b3-7275eda85a93" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss_019cfbf6-499b-7541-a6b3-7275eda85a93" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncomeAbstract_019cfbf6-499b-7446-a384-db0b1248bda1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestIncomeAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_NoninterestIncomeAbstract_019cfbf6-499b-7446-a384-db0b1248bda1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_019cfbf6-499b-7c80-aca4-ba3ffb0adfe4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_019cfbf6-499b-7446-a384-db0b1248bda1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_019cfbf6-499b-7c80-aca4-ba3ffb0adfe4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_019cfbf6-499b-7a19-8e7d-154e8cabc4b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnSalesOfInvestmentRealEstate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_019cfbf6-499b-7446-a384-db0b1248bda1" xlink:to="loc_us-gaap_GainsLossesOnSalesOfInvestmentRealEstate_019cfbf6-499b-7a19-8e7d-154e8cabc4b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_GainLossOnSaleOfLoansAndLeasesHeldForSale_019cfbf6-499b-79c7-ac04-12ee9b955601" xlink:href="bbt-20260331.xsd#bbt_GainLossOnSaleOfLoansAndLeasesHeldForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_019cfbf6-499b-7446-a384-db0b1248bda1" xlink:to="loc_bbt_GainLossOnSaleOfLoansAndLeasesHeldForSale_019cfbf6-499b-79c7-ac04-12ee9b955601" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncomeOther_019cfbf6-499b-78c9-a58e-08fe96adc450" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestIncomeOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_019cfbf6-499b-7446-a384-db0b1248bda1" xlink:to="loc_us-gaap_NoninterestIncomeOther_019cfbf6-499b-78c9-a58e-08fe96adc450" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestIncome_019cfbf6-499b-794f-acf8-b64e0c0fe813" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestIncomeAbstract_019cfbf6-499b-7446-a384-db0b1248bda1" xlink:to="loc_us-gaap_NoninterestIncome_019cfbf6-499b-794f-acf8-b64e0c0fe813" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019cfbf6-499b-7bfe-9d6e-607e9b5693e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019cfbf6-499b-7bfe-9d6e-607e9b5693e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OccupancyNet_019cfbf6-499b-7751-be3a-e313da718adb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OccupancyNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_us-gaap_OccupancyNet_019cfbf6-499b-7751-be3a-e313da718adb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_EquipmentAndDataProcessingExpense_019cfbf6-499b-7fca-8b67-57052e43e17f" xlink:href="bbt-20260331.xsd#bbt_EquipmentAndDataProcessingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_bbt_EquipmentAndDataProcessingExpense_019cfbf6-499b-7fca-8b67-57052e43e17f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfessionalFees_019cfbf6-499b-7bee-983c-96f12c2f4382" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfessionalFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_us-gaap_ProfessionalFees_019cfbf6-499b-7bee-983c-96f12c2f4382" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_019cfbf6-499b-7684-a988-4a35cfa51c63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FederalDepositInsuranceCorporationPremiumExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_us-gaap_FederalDepositInsuranceCorporationPremiumExpense_019cfbf6-499b-7684-a988-4a35cfa51c63" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingAndAdvertisingExpense_019cfbf6-499b-75a6-9f6e-677b8dbd6fd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketingAndAdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_us-gaap_MarketingAndAdvertisingExpense_019cfbf6-499b-75a6-9f6e-677b8dbd6fd5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019cfbf6-499b-700b-85c1-1cb7a1bba11c" 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_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019cfbf6-499b-700b-85c1-1cb7a1bba11c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019cfbf6-499b-7ac6-8394-9231b3e49d89" 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_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019cfbf6-499b-7ac6-8394-9231b3e49d89" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoninterestExpense_019cfbf6-499b-7da0-a5e9-f7c6e3bbc956" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoninterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_us-gaap_OtherNoninterestExpense_019cfbf6-499b-7da0-a5e9-f7c6e3bbc956" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoninterestExpense_019cfbf6-499b-7205-ad07-6bde3de321ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoninterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoninterestExpenseAbstract_019cfbf6-499b-7b44-86c9-978317275acc" xlink:to="loc_us-gaap_NoninterestExpense_019cfbf6-499b-7205-ad07-6bde3de321ed" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cfbf6-499b-71aa-9b24-857242149d56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cfbf6-499b-71aa-9b24-857242149d56" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019cfbf6-499b-7b9b-b9a0-602c2596f817" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019cfbf6-499b-7b9b-b9a0-602c2596f817" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cfbf6-499b-76b2-b0b7-b57d170abf3b" 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_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_NetIncomeLoss_019cfbf6-499b-76b2-b0b7-b57d170abf3b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_019cfbf6-499b-7b3d-80da-a2662fcfdd0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_EarningsPerShareAbstract_019cfbf6-499b-7b3d-80da-a2662fcfdd0a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019cfbf6-499b-76a8-a34d-429ec420e686" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_019cfbf6-499b-7b3d-80da-a2662fcfdd0a" xlink:to="loc_us-gaap_EarningsPerShareBasic_019cfbf6-499b-76a8-a34d-429ec420e686" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019cfbf6-499b-7e32-a8a8-9049a3745199" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_019cfbf6-499b-7b3d-80da-a2662fcfdd0a" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019cfbf6-499b-7e32-a8a8-9049a3745199" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019cfbf6-499b-7d0c-9986-7ef9acd7d39b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019cfbf6-499b-7d0c-9986-7ef9acd7d39b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cfbf6-499b-7cc2-85af-05542323a1ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019cfbf6-499b-7d0c-9986-7ef9acd7d39b" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cfbf6-499b-7cc2-85af-05542323a1ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cfbf6-499b-7e1d-9a3b-8a6fe138dd74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_019cfbf6-499b-7d0c-9986-7ef9acd7d39b" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cfbf6-499b-7e1d-9a3b-8a6fe138dd74" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_019cfbf6-499b-7d35-bd59-95f414d6df19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cfbf6-499b-7e83-8580-b433b5391185" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_019cfbf6-499b-7d35-bd59-95f414d6df19" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/UnauditedConsolidatedStatementsofChangesinStockholdersEquity" xlink:type="simple" xlink:href="bbt-20260331.xsd#UnauditedConsolidatedStatementsofChangesinStockholdersEquity"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/UnauditedConsolidatedStatementsofChangesinStockholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cfbf6-499b-7c36-ab20-f9d32a0603ea" 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_019cfbf6-499b-75b3-b2cf-b031d8e662cb" 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_019cfbf6-499b-7c36-ab20-f9d32a0603ea" xlink:to="loc_us-gaap_StatementTable_019cfbf6-499b-75b3-b2cf-b031d8e662cb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cfbf6-499b-7dff-b7f3-0df758480ff8" 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_019cfbf6-499b-75b3-b2cf-b031d8e662cb" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cfbf6-499b-7dff-b7f3-0df758480ff8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cfbf6-499b-7dff-b7f3-0df758480ff8_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_019cfbf6-499b-7dff-b7f3-0df758480ff8" xlink:to="loc_us-gaap_EquityComponentDomain_019cfbf6-499b-7dff-b7f3-0df758480ff8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cfbf6-499b-7405-b914-3a87d94eb8fd" 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_019cfbf6-499b-7dff-b7f3-0df758480ff8" xlink:to="loc_us-gaap_EquityComponentDomain_019cfbf6-499b-7405-b914-3a87d94eb8fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019cfbf6-499b-7c3a-8762-b578a84f3016" 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_019cfbf6-499b-7405-b914-3a87d94eb8fd" xlink:to="loc_us-gaap_CommonStockMember_019cfbf6-499b-7c3a-8762-b578a84f3016" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019cfbf6-499b-711b-bc00-19bd73230598" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cfbf6-499b-7405-b914-3a87d94eb8fd" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019cfbf6-499b-711b-bc00-19bd73230598" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019cfbf6-499b-70f3-be0a-c145c66f54f7" 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_019cfbf6-499b-7405-b914-3a87d94eb8fd" xlink:to="loc_us-gaap_RetainedEarningsMember_019cfbf6-499b-70f3-be0a-c145c66f54f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cfbf6-499b-7e5b-878f-6917d791e897" 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_019cfbf6-499b-7405-b914-3a87d94eb8fd" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cfbf6-499b-7e5b-878f-6917d791e897" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019cfbf6-499b-724f-8d78-710f4b25507a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cfbf6-499b-7405-b914-3a87d94eb8fd" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019cfbf6-499b-724f-8d78-710f4b25507a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cfbf6-499b-7dab-86fb-7bbcb945d3b4" 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_019cfbf6-499b-7c36-ab20-f9d32a0603ea" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cfbf6-499b-7dab-86fb-7bbcb945d3b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cfbf6-499b-7e7c-afc7-865db62000b4" 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_019cfbf6-499b-7dab-86fb-7bbcb945d3b4" xlink:to="loc_us-gaap_StockholdersEquity_019cfbf6-499b-7e7c-afc7-865db62000b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cfbf6-499b-776c-89a4-89e323a49d04" 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_019cfbf6-499b-7dab-86fb-7bbcb945d3b4" xlink:to="loc_us-gaap_NetIncomeLoss_019cfbf6-499b-776c-89a4-89e323a49d04" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019cfbf6-499b-7212-bd45-24fc6ffe0381" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cfbf6-499b-7dab-86fb-7bbcb945d3b4" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019cfbf6-499b-7212-bd45-24fc6ffe0381" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_019cfbf6-499b-7b29-a50b-4d72b09bf049" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cfbf6-499b-7dab-86fb-7bbcb945d3b4" xlink:to="loc_us-gaap_DividendsCommonStock_019cfbf6-499b-7b29-a50b-4d72b09bf049" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_019cfbf6-499b-76ee-bfc3-a5f806865c36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cfbf6-499b-7dab-86fb-7bbcb945d3b4" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_019cfbf6-499b-76ee-bfc3-a5f806865c36" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions_019ddbfe-2127-7e55-9116-6183ab71681e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cfbf6-499b-7dab-86fb-7bbcb945d3b4" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationAndExerciseOfStockOptions_019ddbfe-2127-7e55-9116-6183ab71681e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cfbf6-499b-76ba-b6f9-9fbe0acb66f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/InvestmentSecuritiesScheduleofSecuritiesAvailableforsaleDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#InvestmentSecuritiesScheduleofSecuritiesAvailableforsaleDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/InvestmentSecuritiesScheduleofSecuritiesAvailableforsaleDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-7042-a1a9-e577b4474357" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-7b9c-83a7-96e710868782" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-7042-a1a9-e577b4474357" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-7b9c-83a7-96e710868782" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-7f0e-9626-6b4fc7f7eb43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-7b9c-83a7-96e710868782" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-7f0e-9626-6b4fc7f7eb43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-7f0e-9626-6b4fc7f7eb43_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-7f0e-9626-6b4fc7f7eb43" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-7f0e-9626-6b4fc7f7eb43_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-778b-8b40-cebdc3a42491" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-7f0e-9626-6b4fc7f7eb43" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-778b-8b40-cebdc3a42491" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_019cfbf6-499b-7c75-9cb9-dad3d08cf563" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-778b-8b40-cebdc3a42491" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_019cfbf6-499b-7c75-9cb9-dad3d08cf563" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CollateralizedMortgageObligationsIssuedByUSGovernmentSponsoredEnterprisesMember_019cfbf6-499b-7421-a1b6-1c4d1c00a824" xlink:href="bbt-20260331.xsd#bbt_CollateralizedMortgageObligationsIssuedByUSGovernmentSponsoredEnterprisesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-778b-8b40-cebdc3a42491" xlink:to="loc_bbt_CollateralizedMortgageObligationsIssuedByUSGovernmentSponsoredEnterprisesMember_019cfbf6-499b-7421-a1b6-1c4d1c00a824" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_019cfbf6-499b-73b8-9469-127e00906103" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-778b-8b40-cebdc3a42491" xlink:to="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_019cfbf6-499b-73b8-9469-127e00906103" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_019cfbf6-499b-7a92-9a15-4b2c0c20c83e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-778b-8b40-cebdc3a42491" xlink:to="loc_us-gaap_MunicipalBondsMember_019cfbf6-499b-7a92-9a15-4b2c0c20c83e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-499b-7a84-8319-804e362c48ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-778b-8b40-cebdc3a42491" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-499b-7a84-8319-804e362c48ec" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryBondSecuritiesMember_019cfbf6-499b-7c02-8574-08edf0186d72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasuryBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-778b-8b40-cebdc3a42491" xlink:to="loc_us-gaap_USTreasuryBondSecuritiesMember_019cfbf6-499b-7c02-8574-08edf0186d72" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019cfbf6-499b-7395-9887-5c22238f5548" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-778b-8b40-cebdc3a42491" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019cfbf6-499b-7395-9887-5c22238f5548" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019cfbf6-499b-75fd-94f0-1417a52b9743" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-7042-a1a9-e577b4474357" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestAfterAllowanceForCreditLoss_019cfbf6-499b-75fd-94f0-1417a52b9743" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019cfbf6-499b-7cea-926a-af5fad7551b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-7042-a1a9-e577b4474357" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019cfbf6-499b-7cea-926a-af5fad7551b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019cfbf6-499b-7bfa-98d8-bc039da5a515" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-7042-a1a9-e577b4474357" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019cfbf6-499b-7bfa-98d8-bc039da5a515" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cfbf6-499b-7f14-b8d6-3c710151da09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-7042-a1a9-e577b4474357" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cfbf6-499b-7f14-b8d6-3c710151da09" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/InvestmentSecuritiesNarrativeDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#InvestmentSecuritiesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/InvestmentSecuritiesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-7635-9805-6ddecb1a8a65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-7635-9805-6ddecb1a8a65" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralAxis_019cfbf6-499b-7871-b332-639bb9ba6a98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-7635-9805-6ddecb1a8a65" xlink:to="loc_us-gaap_CollateralAxis_019cfbf6-499b-7871-b332-639bb9ba6a98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralDomain_019cfbf6-499b-7871-b332-639bb9ba6a98_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CollateralAxis_019cfbf6-499b-7871-b332-639bb9ba6a98" xlink:to="loc_us-gaap_CollateralDomain_019cfbf6-499b-7871-b332-639bb9ba6a98_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralDomain_019cfbf6-499b-7d4e-8382-b6bbedd51b5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CollateralAxis_019cfbf6-499b-7871-b332-639bb9ba6a98" xlink:to="loc_us-gaap_CollateralDomain_019cfbf6-499b-7d4e-8382-b6bbedd51b5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralPledgedMember_019cfbf6-499b-730f-980d-cf3bd759c820" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralPledgedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollateralDomain_019cfbf6-499b-7d4e-8382-b6bbedd51b5a" xlink:to="loc_us-gaap_CollateralPledgedMember_019cfbf6-499b-730f-980d-cf3bd759c820" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-7717-a689-6704fa4901ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-7635-9805-6ddecb1a8a65" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-7717-a689-6704fa4901ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-7717-a689-6704fa4901ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-7717-a689-6704fa4901ea" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-7717-a689-6704fa4901ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-7717-a689-6704fa4901ea" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_USGovernmentSponsoredEnterprisesDebtSecuritiesExcludingSpecifiedSecuritiesMember_019cfbf6-499b-79b8-af1b-5a349fd1dbfa" xlink:href="bbt-20260331.xsd#bbt_USGovernmentSponsoredEnterprisesDebtSecuritiesExcludingSpecifiedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:to="loc_bbt_USGovernmentSponsoredEnterprisesDebtSecuritiesExcludingSpecifiedSecuritiesMember_019cfbf6-499b-79b8-af1b-5a349fd1dbfa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_019cfbf6-499b-7381-b872-1ab82a302c7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_019cfbf6-499b-7381-b872-1ab82a302c7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralizedMortgageObligationsMember_019cfbf6-499b-77c2-99b5-80ea0fccc69c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralizedMortgageObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:to="loc_us-gaap_CollateralizedMortgageObligationsMember_019cfbf6-499b-77c2-99b5-80ea0fccc69c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesMember_019cfbf6-499b-76d8-bd1d-b33a4e91c866" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:to="loc_us-gaap_MortgageBackedSecuritiesMember_019cfbf6-499b-76d8-bd1d-b33a4e91c866" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_019cfbf6-499b-76e7-a673-87ae44913e31" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:to="loc_us-gaap_MunicipalBondsMember_019cfbf6-499b-76e7-a673-87ae44913e31" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-499b-7b92-a177-78df7fbd5c19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-499b-7b92-a177-78df7fbd5c19" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019cfbf6-499b-7d25-8f20-7bb340be4b3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019cfbf6-499b-7d25-8f20-7bb340be4b3c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019cfbf6-499b-7bf7-88c6-511b43023e92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-723f-9726-d4f2a177a6a7" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019cfbf6-499b-7bf7-88c6-511b43023e92" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cfbf6-499b-7487-9b66-05721a646b4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cfbf6-499b-7487-9b66-05721a646b4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax_019cfbf6-499b-7e66-a250-2dbbc867b9e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax_019cfbf6-499b-7e66-a250-2dbbc867b9e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019cfbf6-499b-7ac2-b812-56a2d8bf1c26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019cfbf6-499b-7ac2-b812-56a2d8bf1c26" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DebtSecuritiesAvailableForSaleSecuritiesInUnrealizedLossPositionsAsPercentageOfAmortizedCostOfSecurities_019cfbf6-499b-77a3-b3de-3c9cb3ee0408" xlink:href="bbt-20260331.xsd#bbt_DebtSecuritiesAvailableForSaleSecuritiesInUnrealizedLossPositionsAsPercentageOfAmortizedCostOfSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_bbt_DebtSecuritiesAvailableForSaleSecuritiesInUnrealizedLossPositionsAsPercentageOfAmortizedCostOfSecurities_019cfbf6-499b-77a3-b3de-3c9cb3ee0408" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019cfbf6-499b-791b-9122-6c01d580dfc4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019cfbf6-499b-791b-9122-6c01d580dfc4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRestricted_019cfbf6-499b-7fb5-a339-5de271ff797a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleRestricted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRestricted_019cfbf6-499b-7fb5-a339-5de271ff797a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuritiesBorrowedCollateralObligationToReturnSecurities_019cfbf6-499b-7bb0-9285-7c4fcfaa4907" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuritiesBorrowedCollateralObligationToReturnSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_SecuritiesBorrowedCollateralObligationToReturnSecurities_019cfbf6-499b-7bb0-9285-7c4fcfaa4907" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss_019cfbf6-499b-733b-af39-dba00b6686f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss_019cfbf6-499b-733b-af39-dba00b6686f8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DebtSecuritiesAvailableForSaleNumberOfDaysLoansPastDuePlacedOnNonAccrualStatus_019cfbf6-499b-74b2-9d71-e0ff93c3beb3" xlink:href="bbt-20260331.xsd#bbt_DebtSecuritiesAvailableForSaleNumberOfDaysLoansPastDuePlacedOnNonAccrualStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_bbt_DebtSecuritiesAvailableForSaleNumberOfDaysLoansPastDuePlacedOnNonAccrualStatus_019cfbf6-499b-74b2-9d71-e0ff93c3beb3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DebtSecuritiesAvailableForSaleQualitativeDisclosureNumberOfPositions_019cfbf6-499b-76b6-9fa4-d3bc68418bf6" xlink:href="bbt-20260331.xsd#bbt_DebtSecuritiesAvailableForSaleQualitativeDisclosureNumberOfPositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_bbt_DebtSecuritiesAvailableForSaleQualitativeDisclosureNumberOfPositions_019cfbf6-499b-76b6-9fa4-d3bc68418bf6" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_019cfbf6-499b-7a35-9745-f217e4618395" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_019cfbf6-499b-7a35-9745-f217e4618395" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_019cfbf6-499b-7dbd-8b47-0467effed245" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_019cfbf6-499b-7dbd-8b47-0467effed245" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesRightToCallOrPrepayTheObligationsEstimatedFairValue_019cfbf6-499b-7e8f-a339-924d0c773f24" xlink:href="bbt-20260331.xsd#bbt_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesRightToCallOrPrepayTheObligationsEstimatedFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_bbt_CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesRightToCallOrPrepayTheObligationsEstimatedFairValue_019cfbf6-499b-7e8f-a339-924d0c773f24" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CallableSecuritiesDebtMaturitiesLessThanOneYearFairValue_019cfbf6-499b-76e1-83ab-233d9476274a" xlink:href="bbt-20260331.xsd#bbt_CallableSecuritiesDebtMaturitiesLessThanOneYearFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_bbt_CallableSecuritiesDebtMaturitiesLessThanOneYearFairValue_019cfbf6-499b-76e1-83ab-233d9476274a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CallableSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_019cfbf6-499b-772e-a3f2-329989b35425" xlink:href="bbt-20260331.xsd#bbt_CallableSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_bbt_CallableSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_019cfbf6-499b-772e-a3f2-329989b35425" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CallableSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019cfbf6-499b-72c2-90bc-6cfc4ec5d433" xlink:href="bbt-20260331.xsd#bbt_CallableSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_bbt_CallableSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019cfbf6-499b-72c2-90bc-6cfc4ec5d433" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CallableSecuritiesDebtMaturitiesAfterTenYearsFairValue_019cfbf6-499b-76e6-be45-ad6f826df5cb" xlink:href="bbt-20260331.xsd#bbt_CallableSecuritiesDebtMaturitiesAfterTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_019cfbf6-499b-7d17-a32c-8a4fb74245cd" xlink:to="loc_bbt_CallableSecuritiesDebtMaturitiesAfterTenYearsFairValue_019cfbf6-499b-76e6-be45-ad6f826df5cb" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/InvestmentSecuritiesScheduleofInvestmentSecuritiesinaContinuousUnrealizedLossPositionDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#InvestmentSecuritiesScheduleofInvestmentSecuritiesinaContinuousUnrealizedLossPositionDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/InvestmentSecuritiesScheduleofInvestmentSecuritiesinaContinuousUnrealizedLossPositionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-71d1-a03e-cdd08ff02e56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-781d-b7b5-336679bb0931" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-71d1-a03e-cdd08ff02e56" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-781d-b7b5-336679bb0931" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019cfbf6-499b-7aa4-a258-2e6b5860c3a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cfbf6-499b-781d-b7b5-336679bb0931" xlink:to="loc_us-gaap_InvestmentTypeAxis_019cfbf6-499b-7aa4-a258-2e6b5860c3a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-7aa4-a258-2e6b5860c3a2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019cfbf6-499b-7aa4-a258-2e6b5860c3a2" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-7aa4-a258-2e6b5860c3a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-762f-9784-3ea8aec289d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019cfbf6-499b-7aa4-a258-2e6b5860c3a2" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-762f-9784-3ea8aec289d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_019cfbf6-499b-7e19-b46d-379f79b7da5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-762f-9784-3ea8aec289d3" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_019cfbf6-499b-7e19-b46d-379f79b7da5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralizedMortgageObligationsMember_019cfbf6-499b-7bf0-9831-71eff9897425" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralizedMortgageObligationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-762f-9784-3ea8aec289d3" xlink:to="loc_us-gaap_CollateralizedMortgageObligationsMember_019cfbf6-499b-7bf0-9831-71eff9897425" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesMember_019cfbf6-499b-76bf-a480-02c60a90ed57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-762f-9784-3ea8aec289d3" xlink:to="loc_us-gaap_MortgageBackedSecuritiesMember_019cfbf6-499b-76bf-a480-02c60a90ed57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_019cfbf6-499b-7c09-9595-440040166a93" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-762f-9784-3ea8aec289d3" xlink:to="loc_us-gaap_MunicipalBondsMember_019cfbf6-499b-7c09-9595-440040166a93" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-499b-78e2-834f-da45604b048b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-762f-9784-3ea8aec289d3" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-499b-78e2-834f-da45604b048b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryBondSecuritiesMember_019cfbf6-499b-77ef-ab98-a137c3d8dc4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasuryBondSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019cfbf6-499b-762f-9784-3ea8aec289d3" xlink:to="loc_us-gaap_USTreasuryBondSecuritiesMember_019cfbf6-499b-77ef-ab98-a137c3d8dc4f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cfbf6-499b-74f7-a8f2-69fdeb4a9315" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-71d1-a03e-cdd08ff02e56" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cfbf6-499b-74f7-a8f2-69fdeb4a9315" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019cfbf6-499b-723f-8081-20cf2bef2961" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cfbf6-499b-74f7-a8f2-69fdeb4a9315" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_019cfbf6-499b-723f-8081-20cf2bef2961" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019cfbf6-499b-741c-bc6a-40c5cd389ba4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cfbf6-499b-74f7-a8f2-69fdeb4a9315" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019cfbf6-499b-741c-bc6a-40c5cd389ba4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019cfbf6-499b-74cf-a3db-35ec002e26d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cfbf6-499b-74f7-a8f2-69fdeb4a9315" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_019cfbf6-499b-74cf-a3db-35ec002e26d5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019cfbf6-499b-77cd-938a-35df4ea2cbe2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cfbf6-499b-74f7-a8f2-69fdeb4a9315" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019cfbf6-499b-77cd-938a-35df4ea2cbe2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019cfbf6-499b-703e-8fda-b9e5fff6cfb2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cfbf6-499b-74f7-a8f2-69fdeb4a9315" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_019cfbf6-499b-703e-8fda-b9e5fff6cfb2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019cfbf6-499b-71dc-a8e0-cbec45acd3dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLossAbstract_019cfbf6-499b-74f7-a8f2-69fdeb4a9315" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_019cfbf6-499b-71dc-a8e0-cbec45acd3dd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAbstract_019cfbf6-499b-7c75-8b0b-2c708a0b3b09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cfbf6-499b-71d1-a03e-cdd08ff02e56" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAbstract_019cfbf6-499b-7c75-8b0b-2c708a0b3b09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_019cfbf6-499b-7a6d-a33f-92e549bf585c" xlink:href="bbt-20260331.xsd#bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAbstract_019cfbf6-499b-7c75-8b0b-2c708a0b3b09" xlink:to="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue_019cfbf6-499b-7a6d-a33f-92e549bf585c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019cfbf6-499b-7176-8809-4e84022733b5" xlink:href="bbt-20260331.xsd#bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAbstract_019cfbf6-499b-7c75-8b0b-2c708a0b3b09" xlink:to="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_019cfbf6-499b-7176-8809-4e84022733b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_019cfbf6-499b-7538-b317-a2c6f6536f43" xlink:href="bbt-20260331.xsd#bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAbstract_019cfbf6-499b-7c75-8b0b-2c708a0b3b09" xlink:to="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue_019cfbf6-499b-7538-b317-a2c6f6536f43" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019cfbf6-499b-71f7-b960-be00d7f17762" xlink:href="bbt-20260331.xsd#bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAbstract_019cfbf6-499b-7c75-8b0b-2c708a0b3b09" xlink:to="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_019cfbf6-499b-71f7-b960-be00d7f17762" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_019cfbf6-499b-7b41-be35-53bbcd09a696" xlink:href="bbt-20260331.xsd#bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAbstract_019cfbf6-499b-7c75-8b0b-2c708a0b3b09" xlink:to="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue_019cfbf6-499b-7b41-be35-53bbcd09a696" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_019cfbf6-499b-7031-8864-6192c64410a6" xlink:href="bbt-20260331.xsd#bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleAndHeldToMaturityAbstract_019cfbf6-499b-7c75-8b0b-2c708a0b3b09" xlink:to="loc_bbt_AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss_019cfbf6-499b-7031-8864-6192c64410a6" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/LoansandLeasesScheduleofLoanandLeaseBalancesfortheOriginatedandAcquiredPortfoliosDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#LoansandLeasesScheduleofLoanandLeaseBalancesfortheOriginatedandAcquiredPortfoliosDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/LoansandLeasesScheduleofLoanandLeaseBalancesfortheOriginatedandAcquiredPortfoliosDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cfbf6-499b-74b0-9575-3946a259aeba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cfbf6-499b-797f-9a16-85833fb77410" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cfbf6-499b-74b0-9575-3946a259aeba" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cfbf6-499b-797f-9a16-85833fb77410" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-499b-77a9-b994-324750310d5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cfbf6-499b-797f-9a16-85833fb77410" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-499b-77a9-b994-324750310d5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-499b-77a9-b994-324750310d5d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-499b-77a9-b994-324750310d5d" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-499b-77a9-b994-324750310d5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-499b-7549-b4d2-d38af96aa9d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-499b-77a9-b994-324750310d5d" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-499b-7549-b4d2-d38af96aa9d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-499b-7335-968a-8857a8701492" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-499b-7549-b4d2-d38af96aa9d3" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-499b-7335-968a-8857a8701492" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-499b-7359-ba98-1c9b1239a7e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-499b-7549-b4d2-d38af96aa9d3" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-499b-7359-ba98-1c9b1239a7e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-499b-7eb9-a538-495a363f99d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-499b-7549-b4d2-d38af96aa9d3" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-499b-7eb9-a538-495a363f99d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-499b-7f6c-9a09-ebc59d48f672" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cfbf6-499b-797f-9a16-85833fb77410" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-499b-7f6c-9a09-ebc59d48f672" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-7f6c-9a09-ebc59d48f672_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-499b-7f6c-9a09-ebc59d48f672" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-7f6c-9a09-ebc59d48f672_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-499b-7f6c-9a09-ebc59d48f672" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialRealEstateMortgageMember_019cfbf6-499b-7c90-8132-1ccc95ea424a" xlink:href="bbt-20260331.xsd#bbt_CommercialRealEstateMortgageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:to="loc_bbt_CommercialRealEstateMortgageMember_019cfbf6-499b-7c90-8132-1ccc95ea424a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialRealEstateMultiFamilyReceivableMember_019cfbf6-499b-7a62-a527-18f64d912af2" xlink:href="bbt-20260331.xsd#bbt_CommercialRealEstateMultiFamilyReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:to="loc_bbt_CommercialRealEstateMultiFamilyReceivableMember_019cfbf6-499b-7a62-a527-18f64d912af2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionLoansMember_019cfbf6-499b-7b5e-a1ff-2cb6bfc9b29d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:to="loc_us-gaap_ConstructionLoansMember_019cfbf6-499b-7b5e-a1ff-2cb6bfc9b29d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialLoanMember_019cfbf6-499b-77eb-b918-c7dfd37b8abd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:to="loc_us-gaap_CommercialLoanMember_019cfbf6-499b-77eb-b918-c7dfd37b8abd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialLoansEquipmentFinancingLoansMember_019cfbf6-499b-7864-a5c0-2e3156636e1d" xlink:href="bbt-20260331.xsd#bbt_CommercialLoansEquipmentFinancingLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:to="loc_bbt_CommercialLoansEquipmentFinancingLoansMember_019cfbf6-499b-7864-a5c0-2e3156636e1d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageMember_019cfbf6-499b-7bcf-8bb1-d4f5661457e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialMortgageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:to="loc_us-gaap_ResidentialMortgageMember_019cfbf6-499b-7bcf-8bb1-d4f5661457e0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HomeEquityMember_019cfbf6-499b-7e8f-9c6a-11929b166539" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HomeEquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:to="loc_us-gaap_HomeEquityMember_019cfbf6-499b-7e8f-9c6a-11929b166539" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_OtherConsumerMember_019cfbf6-499b-73ae-a010-cbc5b1f8de65" xlink:href="bbt-20260331.xsd#bbt_OtherConsumerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-752e-9ca2-d9b4b790b2ec" xlink:to="loc_bbt_OtherConsumerMember_019cfbf6-499b-73ae-a010-cbc5b1f8de65" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-499b-79e4-9f8f-bd038bd219ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cfbf6-499b-74b0-9575-3946a259aeba" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-499b-79e4-9f8f-bd038bd219ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_WeightedAverageInterestRateFinancingReceivable_019cfbf6-499b-7e42-847d-a2d1b29f0520" xlink:href="bbt-20260331.xsd#bbt_WeightedAverageInterestRateFinancingReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cfbf6-499b-74b0-9575-3946a259aeba" xlink:to="loc_bbt_WeightedAverageInterestRateFinancingReceivable_019cfbf6-499b-7e42-847d-a2d1b29f0520" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/LoansandLeasesNarrativeDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#LoansandLeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/LoansandLeasesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cfbf6-499b-7137-9569-be37ab41b17b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cfbf6-499b-71b4-bf7c-df4cff6f0c3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cfbf6-499b-7137-9569-be37ab41b17b" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cfbf6-499b-71b4-bf7c-df4cff6f0c3a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-77ae-9d81-729311b980ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cfbf6-499b-71b4-bf7c-df4cff6f0c3a" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-77ae-9d81-729311b980ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-77ae-9d81-729311b980ac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-77ae-9d81-729311b980ac" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-77ae-9d81-729311b980ac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-70af-9f2c-02fdaf065380" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-499b-77ae-9d81-729311b980ac" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-70af-9f2c-02fdaf065380" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoansAndLeasesReceivableMember_019cfbf6-499b-7eb3-9fa7-3fe46780397f" xlink:href="bbt-20260331.xsd#bbt_LoansAndLeasesReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-499b-70af-9f2c-02fdaf065380" xlink:to="loc_bbt_LoansAndLeasesReceivableMember_019cfbf6-499b-7eb3-9fa7-3fe46780397f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusAxis_019cfbf6-499b-704c-80ac-a81d7ebda1fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PledgedStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cfbf6-499b-71b4-bf7c-df4cff6f0c3a" xlink:to="loc_us-gaap_PledgedStatusAxis_019cfbf6-499b-704c-80ac-a81d7ebda1fd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_019cfbf6-499b-704c-80ac-a81d7ebda1fd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PledgedStatusAxis_019cfbf6-499b-704c-80ac-a81d7ebda1fd" xlink:to="loc_us-gaap_PledgedStatusDomain_019cfbf6-499b-704c-80ac-a81d7ebda1fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PledgedStatusDomain_019cfbf6-499b-73c4-9caa-7c9f3f301af0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PledgedStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PledgedStatusAxis_019cfbf6-499b-704c-80ac-a81d7ebda1fd" xlink:to="loc_us-gaap_PledgedStatusDomain_019cfbf6-499b-73c4-9caa-7c9f3f301af0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetPledgedAsCollateralWithRightMember_019cfbf6-499b-73b8-990c-6cb81d340956" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetPledgedAsCollateralWithRightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PledgedStatusDomain_019cfbf6-499b-73c4-9caa-7c9f3f301af0" xlink:to="loc_us-gaap_AssetPledgedAsCollateralWithRightMember_019cfbf6-499b-73b8-990c-6cb81d340956" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-499b-7343-846a-c4ffd585a308" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019cfbf6-499b-71b4-bf7c-df4cff6f0c3a" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-499b-7343-846a-c4ffd585a308" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-7343-846a-c4ffd585a308_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-499b-7343-846a-c4ffd585a308" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-7343-846a-c4ffd585a308_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-7e6a-8e53-b3c0f251fa8b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-499b-7343-846a-c4ffd585a308" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-7e6a-8e53-b3c0f251fa8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FederalReserveBankBorrowingsMember_019cfbf6-499b-72f9-ab13-370510f96281" xlink:href="bbt-20260331.xsd#bbt_FederalReserveBankBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-499b-7e6a-8e53-b3c0f251fa8b" xlink:to="loc_bbt_FederalReserveBankBorrowingsMember_019cfbf6-499b-72f9-ab13-370510f96281" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss_019cfbf6-499b-75df-b21d-815e852261fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cfbf6-499b-7137-9569-be37ab41b17b" xlink:to="loc_us-gaap_FinancingReceivableAccruedInterestAfterAllowanceForCreditLoss_019cfbf6-499b-75df-b21d-815e852261fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount_019cfbf6-499b-78f5-9a05-3cec9009cf8a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cfbf6-499b-7137-9569-be37ab41b17b" xlink:to="loc_us-gaap_FinancingReceivableUnamortizedLoanCommitmentOriginationFeeAndPremiumDiscount_019cfbf6-499b-78f5-9a05-3cec9009cf8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-499b-7656-83a8-e99c12c00d14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019cfbf6-499b-7137-9569-be37ab41b17b" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-499b-7656-83a8-e99c12c00d14" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofChangesintheAllowanceforLoanandLeaseLossesDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#AllowanceforCreditLossesScheduleofChangesintheAllowanceforLoanandLeaseLossesDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofChangesintheAllowanceforLoanandLeaseLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cfbf6-4a63-719b-a286-3b6d93511b50" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-797a-b7f9-345d0bd29713" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cfbf6-4a63-719b-a286-3b6d93511b50" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-797a-b7f9-345d0bd29713" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7c7c-9685-6225c5bff9a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-797a-b7f9-345d0bd29713" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7c7c-9685-6225c5bff9a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7c7c-9685-6225c5bff9a5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7c7c-9685-6225c5bff9a5" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7c7c-9685-6225c5bff9a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7e92-9160-9b71fb93a105" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7c7c-9685-6225c5bff9a5" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7e92-9160-9b71fb93a105" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-4a63-7aca-adb7-d1f0564de1a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7e92-9160-9b71fb93a105" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-4a63-7aca-adb7-d1f0564de1a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-4a63-737e-86bc-bc6ffd6398d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7e92-9160-9b71fb93a105" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-4a63-737e-86bc-bc6ffd6398d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-4a63-7ecd-a736-ea5860bdd373" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7e92-9160-9b71fb93a105" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-4a63-7ecd-a736-ea5860bdd373" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019cfbf6-4a63-7833-8d7b-98d28154a203" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cfbf6-4a63-719b-a286-3b6d93511b50" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019cfbf6-4a63-7833-8d7b-98d28154a203" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cfbf6-4a63-76b9-ba7c-06da8fabb012" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019cfbf6-4a63-7833-8d7b-98d28154a203" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cfbf6-4a63-76b9-ba7c-06da8fabb012" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019cfbf6-4a63-77b1-af9c-9f3b8f5cfc29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019cfbf6-4a63-7833-8d7b-98d28154a203" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019cfbf6-4a63-77b1-af9c-9f3b8f5cfc29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery_019cfbf6-4a63-7f78-8db1-de550bbf396d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019cfbf6-4a63-7833-8d7b-98d28154a203" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery_019cfbf6-4a63-7f78-8db1-de550bbf396d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_019cfbf6-4a63-7dcd-8224-87a5993b98f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_019cfbf6-4a63-7833-8d7b-98d28154a203" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_019cfbf6-4a63-7dcd-8224-87a5993b98f1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cfbf6-4a63-7cb4-bb31-57c349e46b85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/AllowanceforCreditLossesNarrativeDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#AllowanceforCreditLossesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/AllowanceforCreditLossesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-719d-aa5f-ec938b2a1143" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-719d-aa5f-ec938b2a1143" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019d2b10-13ec-7f0e-99f3-bc46ad1a1121" 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_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-719d-aa5f-ec938b2a1143" xlink:to="loc_srt_RangeAxis_019d2b10-13ec-7f0e-99f3-bc46ad1a1121" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019d2b10-13ec-7f0e-99f3-bc46ad1a1121_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_019d2b10-13ec-7f0e-99f3-bc46ad1a1121" xlink:to="loc_srt_RangeMember_019d2b10-13ec-7f0e-99f3-bc46ad1a1121_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019d2b10-13ec-7fd0-9f48-db16b8e14767" 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_019d2b10-13ec-7f0e-99f3-bc46ad1a1121" xlink:to="loc_srt_RangeMember_019d2b10-13ec-7fd0-9f48-db16b8e14767" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019d2b10-13ec-7d64-9e9b-c24047919227" 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_019d2b10-13ec-7fd0-9f48-db16b8e14767" xlink:to="loc_srt_MinimumMember_019d2b10-13ec-7d64-9e9b-c24047919227" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019d2b10-13ec-706c-ad2a-d9b4e58976fb" 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_019d2b10-13ec-7fd0-9f48-db16b8e14767" xlink:to="loc_srt_MaximumMember_019d2b10-13ec-706c-ad2a-d9b4e58976fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentAxis_019d2b10-a9cf-760f-b33d-e7ab9b404da2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-719d-aa5f-ec938b2a1143" xlink:to="loc_us-gaap_InternalCreditAssessmentAxis_019d2b10-a9cf-760f-b33d-e7ab9b404da2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019d2b10-a9cf-760f-b33d-e7ab9b404da2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019d2b10-a9cf-760f-b33d-e7ab9b404da2" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019d2b10-a9cf-760f-b33d-e7ab9b404da2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019d2b10-a9cf-7207-be1e-13f880bcd635" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019d2b10-a9cf-760f-b33d-e7ab9b404da2" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019d2b10-a9cf-7207-be1e-13f880bcd635" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnlikelyToBeCollectedFinancingReceivableMember_019d2b10-a9cf-7f96-b37b-c4551fb74720" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnlikelyToBeCollectedFinancingReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019d2b10-a9cf-7207-be1e-13f880bcd635" xlink:to="loc_us-gaap_UnlikelyToBeCollectedFinancingReceivableMember_019d2b10-a9cf-7f96-b37b-c4551fb74720" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019de1ef-6fe5-7c6e-8db1-96155859df91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-719d-aa5f-ec938b2a1143" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019de1ef-6fe5-7c6e-8db1-96155859df91" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019de1ef-6fe5-7c6e-8db1-96155859df91_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019de1ef-6fe5-7c6e-8db1-96155859df91" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019de1ef-6fe5-7c6e-8db1-96155859df91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019de1ef-6fe5-752b-bee9-cb72b166b8a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019de1ef-6fe5-7c6e-8db1-96155859df91" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019de1ef-6fe5-752b-bee9-cb72b166b8a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_TotalMember_019de1ef-6fe5-7319-8e6d-be7914a9bb0b" xlink:href="bbt-20260331.xsd#bbt_TotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019de1ef-6fe5-752b-bee9-cb72b166b8a5" xlink:to="loc_bbt_TotalMember_019de1ef-6fe5-7319-8e6d-be7914a9bb0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffBalanceSheetCreditLossLiability_019d2b0f-b37b-7897-b19d-61462690b259" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffBalanceSheetCreditLossLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_us-gaap_OffBalanceSheetCreditLossLiability_019d2b0f-b37b-7897-b19d-61462690b259" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal_019d2b0f-b37b-7b2f-a2ba-729d0308d6d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_us-gaap_OffBalanceSheetCreditLossLiabilityCreditLossExpenseReversal_019d2b0f-b37b-7b2f-a2ba-729d0308d6d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_AllowanceForCreditLossStartOfRevisionPeriodFromForecastStartDate_019d2b10-13ec-792f-865b-626cf0c54899" xlink:href="bbt-20260331.xsd#bbt_AllowanceForCreditLossStartOfRevisionPeriodFromForecastStartDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_bbt_AllowanceForCreditLossStartOfRevisionPeriodFromForecastStartDate_019d2b10-13ec-792f-865b-626cf0c54899" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_AllowanceForCreditLossCompletionOfRevisionPeriodFromForecastStartDate_019d2b10-13ec-716e-bcc1-2a2d91f2cc8d" xlink:href="bbt-20260331.xsd#bbt_AllowanceForCreditLossCompletionOfRevisionPeriodFromForecastStartDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_bbt_AllowanceForCreditLossCompletionOfRevisionPeriodFromForecastStartDate_019d2b10-13ec-716e-bcc1-2a2d91f2cc8d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancingReceivableQualitativeAdjustmentsToModelsForCreditRiskNet_019d2b10-13ec-7c04-8d9c-8fdf0d9805cb" xlink:href="bbt-20260331.xsd#bbt_FinancingReceivableQualitativeAdjustmentsToModelsForCreditRiskNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_bbt_FinancingReceivableQualitativeAdjustmentsToModelsForCreditRiskNet_019d2b10-13ec-7c04-8d9c-8fdf0d9805cb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_GeneralAllowanceForLoanAndLeaseLosses_019d2b10-13ec-79c3-ba3c-bb38d40218de" xlink:href="bbt-20260331.xsd#bbt_GeneralAllowanceForLoanAndLeaseLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_bbt_GeneralAllowanceForLoanAndLeaseLosses_019d2b10-13ec-79c3-ba3c-bb38d40218de" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_SpecificAllowanceForLoanAndLeaseLosses_019ddf0a-2a09-7496-ad80-051318142121" xlink:href="bbt-20260331.xsd#bbt_SpecificAllowanceForLoanAndLeaseLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_bbt_SpecificAllowanceForLoanAndLeaseLosses_019ddf0a-2a09-7496-ad80-051318142121" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019d2b10-a9cf-719c-808e-550c6263c82e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019d2b10-a9cf-719c-808e-550c6263c82e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableNonaccrualInterestIncome_019d2b12-bd12-7627-9d3f-6767aa58b78e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableNonaccrualInterestIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019d2b0f-b37b-7d8e-a064-042c98f14b97" xlink:to="loc_us-gaap_FinancingReceivableNonaccrualInterestIncome_019d2b12-bd12-7627-9d3f-6767aa58b78e" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofProvisionsforCreditLossesDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#AllowanceforCreditLossesScheduleofProvisionsforCreditLossesDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofProvisionsforCreditLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cfbf6-4a63-7a49-9207-94fae7f272e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-70cb-85dc-0e416c49a4a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cfbf6-4a63-7a49-9207-94fae7f272e6" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-70cb-85dc-0e416c49a4a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7be0-b9a1-fc5a6a10ba6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-70cb-85dc-0e416c49a4a5" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7be0-b9a1-fc5a6a10ba6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7be0-b9a1-fc5a6a10ba6b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7be0-b9a1-fc5a6a10ba6b" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7be0-b9a1-fc5a6a10ba6b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-77cd-899e-33e1ba7c1891" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7be0-b9a1-fc5a6a10ba6b" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-77cd-899e-33e1ba7c1891" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-4a63-7d7b-8cb1-0c717d096dfc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-77cd-899e-33e1ba7c1891" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-4a63-7d7b-8cb1-0c717d096dfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-4a63-74d5-b93b-ce13bb4c70a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-77cd-899e-33e1ba7c1891" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-4a63-74d5-b93b-ce13bb4c70a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-4a63-7a85-9e55-e07c508b91cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-77cd-899e-33e1ba7c1891" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-4a63-7a85-9e55-e07c508b91cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7f95-b146-fb0277b683d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019cfbf6-4a63-70cb-85dc-0e416c49a4a5" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7f95-b146-fb0277b683d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7f95-b146-fb0277b683d6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7f95-b146-fb0277b683d6" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7f95-b146-fb0277b683d6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-76e3-9c68-e5565738a0d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7f95-b146-fb0277b683d6" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-76e3-9c68-e5565738a0d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnfundedLoanCommitmentMember_019cfbf6-4a63-7900-bed8-e35b2c46d472" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnfundedLoanCommitmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-76e3-9c68-e5565738a0d0" xlink:to="loc_us-gaap_UnfundedLoanCommitmentMember_019cfbf6-4a63-7900-bed8-e35b2c46d472" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableforsaleSecuritiesMember_019cfbf6-4a63-7434-82bc-70d8cca3ad34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableforsaleSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-76e3-9c68-e5565738a0d0" xlink:to="loc_us-gaap_AvailableforsaleSecuritiesMember_019cfbf6-4a63-7434-82bc-70d8cca3ad34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_019cfbf6-4a63-7179-bfaa-06a6c23e987f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cfbf6-4a63-7a49-9207-94fae7f272e6" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_019cfbf6-4a63-7179-bfaa-06a6c23e987f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForOtherCreditLosses_019cfbf6-4a63-7a6b-88b4-9eb53c6dbdab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForOtherCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cfbf6-4a63-7a49-9207-94fae7f272e6" xlink:to="loc_us-gaap_ProvisionForOtherCreditLosses_019cfbf6-4a63-7a6b-88b4-9eb53c6dbdab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_019cfbf6-4a63-7a86-9541-6aa5150269c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForLoanLeaseAndOtherLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019cfbf6-4a63-7a49-9207-94fae7f272e6" xlink:to="loc_us-gaap_ProvisionForLoanLeaseAndOtherLosses_019cfbf6-4a63-7a86-9541-6aa5150269c1" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/AllowanceforCreditLossesScheduleoftheRecordedInvestmentsbyCreditQualityIndicatorbyLoanClassDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#AllowanceforCreditLossesScheduleoftheRecordedInvestmentsbyCreditQualityIndicatorbyLoanClassDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/AllowanceforCreditLossesScheduleoftheRecordedInvestmentsbyCreditQualityIndicatorbyLoanClassDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cfbf6-4a63-7aa5-a984-5edabfbc6b0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cfbf6-4a63-7aa5-a984-5edabfbc6b0a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-75f3-a121-6efa5a327f42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cfbf6-4a63-7aa5-a984-5edabfbc6b0a" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-75f3-a121-6efa5a327f42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-75f3-a121-6efa5a327f42_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-75f3-a121-6efa5a327f42" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-75f3-a121-6efa5a327f42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-75f3-a121-6efa5a327f42" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialRealEstateMortgageMember_019cfbf6-4a63-7975-8c6e-f190c493cafb" xlink:href="bbt-20260331.xsd#bbt_CommercialRealEstateMortgageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:to="loc_bbt_CommercialRealEstateMortgageMember_019cfbf6-4a63-7975-8c6e-f190c493cafb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialRealEstateMultiFamilyReceivableMember_019cfbf6-4a63-79cd-8a0d-554a1316d3e9" xlink:href="bbt-20260331.xsd#bbt_CommercialRealEstateMultiFamilyReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:to="loc_bbt_CommercialRealEstateMultiFamilyReceivableMember_019cfbf6-4a63-79cd-8a0d-554a1316d3e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionLoansMember_019cfbf6-4a63-731c-ab40-94f3d5dca9e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:to="loc_us-gaap_ConstructionLoansMember_019cfbf6-4a63-731c-ab40-94f3d5dca9e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialLoanMember_019cfbf6-4a63-7382-b539-d235719fec9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:to="loc_us-gaap_CommercialLoanMember_019cfbf6-4a63-7382-b539-d235719fec9f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialLoansEquipmentFinancingLoansMember_019cfbf6-4a63-706f-93d9-9d6672df02a7" xlink:href="bbt-20260331.xsd#bbt_CommercialLoansEquipmentFinancingLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:to="loc_bbt_CommercialLoansEquipmentFinancingLoansMember_019cfbf6-4a63-706f-93d9-9d6672df02a7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageMember_019cfbf6-4a63-740b-a40a-b40ed820872e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialMortgageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:to="loc_us-gaap_ResidentialMortgageMember_019cfbf6-4a63-740b-a40a-b40ed820872e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HomeEquityMember_019cfbf6-4a63-7949-bd9a-a01961e38bed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HomeEquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:to="loc_us-gaap_HomeEquityMember_019cfbf6-4a63-7949-bd9a-a01961e38bed" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_OtherConsumerMember_019cfbf6-4a63-7846-8fda-d1fb37c37c5a" xlink:href="bbt-20260331.xsd#bbt_OtherConsumerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:to="loc_bbt_OtherConsumerMember_019cfbf6-4a63-7846-8fda-d1fb37c37c5a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_TotalMember_019cfbf6-4a63-7e07-bdd0-ad03537c7be7" xlink:href="bbt-20260331.xsd#bbt_TotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-72db-ba87-09f69359f520" xlink:to="loc_bbt_TotalMember_019cfbf6-4a63-7e07-bdd0-ad03537c7be7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentAxis_019cfbf6-4a63-7865-87f2-9c22b1ba6014" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cfbf6-4a63-7aa5-a984-5edabfbc6b0a" xlink:to="loc_us-gaap_InternalCreditAssessmentAxis_019cfbf6-4a63-7865-87f2-9c22b1ba6014" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019cfbf6-4a63-7865-87f2-9c22b1ba6014_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019cfbf6-4a63-7865-87f2-9c22b1ba6014" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019cfbf6-4a63-7865-87f2-9c22b1ba6014_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019cfbf6-4a63-7f31-a428-64874d8165bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019cfbf6-4a63-7865-87f2-9c22b1ba6014" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019cfbf6-4a63-7f31-a428-64874d8165bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PassMember_019cfbf6-4a63-7975-aae8-b5f29b990b22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PassMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019cfbf6-4a63-7f31-a428-64874d8165bb" xlink:to="loc_us-gaap_PassMember_019cfbf6-4a63-7975-aae8-b5f29b990b22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SpecialMentionMember_019cfbf6-4a63-7924-aa9b-9815822db53d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SpecialMentionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019cfbf6-4a63-7f31-a428-64874d8165bb" xlink:to="loc_us-gaap_SpecialMentionMember_019cfbf6-4a63-7924-aa9b-9815822db53d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubstandardMember_019cfbf6-4a63-7534-ae57-483fc5c852ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubstandardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019cfbf6-4a63-7f31-a428-64874d8165bb" xlink:to="loc_us-gaap_SubstandardMember_019cfbf6-4a63-7534-ae57-483fc5c852ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DoubtfulMember_019cfbf6-4a63-79d7-a522-8e70708ea14e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DoubtfulMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019cfbf6-4a63-7f31-a428-64874d8165bb" xlink:to="loc_us-gaap_DoubtfulMember_019cfbf6-4a63-79d7-a522-8e70708ea14e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancingReceivableInformationByCreditScoreAxis_019cfbf6-4a63-7ee0-8ac6-039b261a79d4" xlink:href="bbt-20260331.xsd#bbt_FinancingReceivableInformationByCreditScoreAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019cfbf6-4a63-7aa5-a984-5edabfbc6b0a" xlink:to="loc_bbt_FinancingReceivableInformationByCreditScoreAxis_019cfbf6-4a63-7ee0-8ac6-039b261a79d4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancingReceivableByCreditScoreDomain_019cfbf6-4a63-7ee0-8ac6-039b261a79d4_default" xlink:href="bbt-20260331.xsd#bbt_FinancingReceivableByCreditScoreDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_bbt_FinancingReceivableInformationByCreditScoreAxis_019cfbf6-4a63-7ee0-8ac6-039b261a79d4" xlink:to="loc_bbt_FinancingReceivableByCreditScoreDomain_019cfbf6-4a63-7ee0-8ac6-039b261a79d4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancingReceivableByCreditScoreDomain_019cfbf6-4a63-7201-9e22-70a806665489" xlink:href="bbt-20260331.xsd#bbt_FinancingReceivableByCreditScoreDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_bbt_FinancingReceivableInformationByCreditScoreAxis_019cfbf6-4a63-7ee0-8ac6-039b261a79d4" xlink:to="loc_bbt_FinancingReceivableByCreditScoreDomain_019cfbf6-4a63-7201-9e22-70a806665489" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CreditScoreGreaterThan700Member_019cfbf6-4a63-7b80-b880-aa992be0fed1" xlink:href="bbt-20260331.xsd#bbt_CreditScoreGreaterThan700Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_FinancingReceivableByCreditScoreDomain_019cfbf6-4a63-7201-9e22-70a806665489" xlink:to="loc_bbt_CreditScoreGreaterThan700Member_019cfbf6-4a63-7b80-b880-aa992be0fed1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CreditScore661To700Member_019cfbf6-4a63-7d34-bf92-edc610c0463c" xlink:href="bbt-20260331.xsd#bbt_CreditScore661To700Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_FinancingReceivableByCreditScoreDomain_019cfbf6-4a63-7201-9e22-70a806665489" xlink:to="loc_bbt_CreditScore661To700Member_019cfbf6-4a63-7d34-bf92-edc610c0463c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CreditScoreEqualToOrBelow660Member_019cfbf6-4a63-7d9b-bb5d-fb32a581819f" xlink:href="bbt-20260331.xsd#bbt_CreditScoreEqualToOrBelow660Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_FinancingReceivableByCreditScoreDomain_019cfbf6-4a63-7201-9e22-70a806665489" xlink:to="loc_bbt_CreditScoreEqualToOrBelow660Member_019cfbf6-4a63-7d9b-bb5d-fb32a581819f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CreditScoreDataNotAvailableMember_019cfbf6-4a63-78ec-ba6b-a9f546dd7005" xlink:href="bbt-20260331.xsd#bbt_CreditScoreDataNotAvailableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_FinancingReceivableByCreditScoreDomain_019cfbf6-4a63-7201-9e22-70a806665489" xlink:to="loc_bbt_CreditScoreDataNotAvailableMember_019cfbf6-4a63-78ec-ba6b-a9f546dd7005" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_019cfbf6-4a63-7a9d-bbaf-f65d594f9f79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_019cfbf6-4a63-7a9d-bbaf-f65d594f9f79" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_019cfbf6-4a63-7746-a4f3-3eeaf9bd42e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_019cfbf6-4a63-7746-a4f3-3eeaf9bd42e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_019cfbf6-4a63-71a6-8abf-2effd3bbc2a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_019cfbf6-4a63-71a6-8abf-2effd3bbc2a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_019cfbf6-4a63-7b7e-9806-4fa2ea54d926" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_019cfbf6-4a63-7b7e-9806-4fa2ea54d926" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_019cfbf6-4a63-7d5f-b7c4-d7a59c33de95" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_019cfbf6-4a63-7d5f-b7c4-d7a59c33de95" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_019cfbf6-4a63-71ec-9598-a7a352092447" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_019cfbf6-4a63-71ec-9598-a7a352092447" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolving_019cfbf6-4a63-7cd1-a3db-ecf0ede71748" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestRevolving"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolving_019cfbf6-4a63-7cd1-a3db-ecf0ede71748" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan_019cfbf6-4a63-74d4-998a-36a5fc18a485" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoan_019cfbf6-4a63-74d4-998a-36a5fc18a485" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-4a63-7d67-ba18-b8d78937995b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-4a63-7d67-ba18-b8d78937995b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019cfbf6-4a63-77e3-a4dd-d67307dd58e4" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff_019cfbf6-4a63-7f30-b5e7-82c64d027fde" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff_019cfbf6-4a63-7f30-b5e7-82c64d027fde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-7d74-9c54-5fca7d494402" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-7d74-9c54-5fca7d494402" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-7a8b-9676-eb36d1252ae5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-7a8b-9676-eb36d1252ae5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-715e-a2bf-9692531264d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-715e-a2bf-9692531264d3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-7e39-bd17-be55befc21ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-7e39-bd17-be55befc21ec" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-7955-bc3e-00b7de7321c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff_019cfbf6-4a63-7955-bc3e-00b7de7321c5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff_019cfbf6-4a63-7faa-b13c-e5a7a1720518" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingWriteoff_019cfbf6-4a63-7faa-b13c-e5a7a1720518" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff_019cfbf6-4a63-7e3f-aae0-46dcfc64eb61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff_019cfbf6-4a63-7e3f-aae0-46dcfc64eb61" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019cfbf6-4a63-7deb-89e8-0911296dbcee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_019cfbf6-4a63-7160-9e8c-60c966b38e3a" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019cfbf6-4a63-7deb-89e8-0911296dbcee" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofInformationRegardingtheAgingofPastDueLoansbyLoanClassDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#AllowanceforCreditLossesScheduleofInformationRegardingtheAgingofPastDueLoansbyLoanClassDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofInformationRegardingtheAgingofPastDueLoansbyLoanClassDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cfbf6-4a63-7701-b953-765beba94c40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cfbf6-4a63-71e7-8023-aca1105a7ef6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cfbf6-4a63-7701-b953-765beba94c40" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cfbf6-4a63-71e7-8023-aca1105a7ef6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cfbf6-4a63-7e94-b1bb-172f6f238076" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cfbf6-4a63-71e7-8023-aca1105a7ef6" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cfbf6-4a63-7e94-b1bb-172f6f238076" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-7e94-b1bb-172f6f238076_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cfbf6-4a63-7e94-b1bb-172f6f238076" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-7e94-b1bb-172f6f238076_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-7c25-8d1d-c48e2d2fafb2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cfbf6-4a63-7e94-b1bb-172f6f238076" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-7c25-8d1d-c48e2d2fafb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetPastDueMember_019cfbf6-4a63-7b11-9de5-e2b3d76733db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialAssetPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-7c25-8d1d-c48e2d2fafb2" xlink:to="loc_us-gaap_FinancialAssetPastDueMember_019cfbf6-4a63-7b11-9de5-e2b3d76733db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancingReceivables31to60DaysPastDueMember_019cfbf6-4a63-7847-a94f-2a99c31bdfd8" xlink:href="bbt-20260331.xsd#bbt_FinancingReceivables31to60DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_019cfbf6-4a63-7b11-9de5-e2b3d76733db" xlink:to="loc_bbt_FinancingReceivables31to60DaysPastDueMember_019cfbf6-4a63-7847-a94f-2a99c31bdfd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancingReceivables61to90DaysPastDueMember_019cfbf6-4a63-7351-8189-827f03280c14" xlink:href="bbt-20260331.xsd#bbt_FinancingReceivables61to90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_019cfbf6-4a63-7b11-9de5-e2b3d76733db" xlink:to="loc_bbt_FinancingReceivables61to90DaysPastDueMember_019cfbf6-4a63-7351-8189-827f03280c14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancingReceivablesGreaterthan90DaysPastDueMember_019cfbf6-4a63-7b0d-9d67-31919e780053" xlink:href="bbt-20260331.xsd#bbt_FinancingReceivablesGreaterthan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialAssetPastDueMember_019cfbf6-4a63-7b11-9de5-e2b3d76733db" xlink:to="loc_bbt_FinancingReceivablesGreaterthan90DaysPastDueMember_019cfbf6-4a63-7b0d-9d67-31919e780053" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetNotPastDueMember_019cfbf6-4a63-7d92-8712-0ab54c389175" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialAssetNotPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-7c25-8d1d-c48e2d2fafb2" xlink:to="loc_us-gaap_FinancialAssetNotPastDueMember_019cfbf6-4a63-7d92-8712-0ab54c389175" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7958-9ce1-979b46e21650" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cfbf6-4a63-71e7-8023-aca1105a7ef6" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7958-9ce1-979b46e21650" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7958-9ce1-979b46e21650_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7958-9ce1-979b46e21650" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7958-9ce1-979b46e21650_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7333-996a-a9285c7d6fed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-7958-9ce1-979b46e21650" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7333-996a-a9285c7d6fed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-4a63-7942-b999-697948bff93a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7333-996a-a9285c7d6fed" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-4a63-7942-b999-697948bff93a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-4a63-79ec-897b-d100860ee93b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7333-996a-a9285c7d6fed" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-4a63-79ec-897b-d100860ee93b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-4a63-71fa-a281-b0919c1bdf55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7333-996a-a9285c7d6fed" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-4a63-71fa-a281-b0919c1bdf55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7b19-82ff-36ffc23d32d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_019cfbf6-4a63-71e7-8023-aca1105a7ef6" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7b19-82ff-36ffc23d32d7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7b19-82ff-36ffc23d32d7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7b19-82ff-36ffc23d32d7" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7b19-82ff-36ffc23d32d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7b19-82ff-36ffc23d32d7" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialRealEstateMortgageMember_019cfbf6-4a63-7e18-b9e8-aaf77a0a67d2" xlink:href="bbt-20260331.xsd#bbt_CommercialRealEstateMortgageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:to="loc_bbt_CommercialRealEstateMortgageMember_019cfbf6-4a63-7e18-b9e8-aaf77a0a67d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialRealEstateMultiFamilyReceivableMember_019cfbf6-4a63-76cf-b34a-b0e23c78fb1e" xlink:href="bbt-20260331.xsd#bbt_CommercialRealEstateMultiFamilyReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:to="loc_bbt_CommercialRealEstateMultiFamilyReceivableMember_019cfbf6-4a63-76cf-b34a-b0e23c78fb1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionLoansMember_019cfbf6-4a63-7c2b-9292-b998cf343cbe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:to="loc_us-gaap_ConstructionLoansMember_019cfbf6-4a63-7c2b-9292-b998cf343cbe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialLoanMember_019cfbf6-4a63-721c-8893-598bc327ea0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:to="loc_us-gaap_CommercialLoanMember_019cfbf6-4a63-721c-8893-598bc327ea0a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialLoansEquipmentFinancingLoansMember_019cfbf6-4a63-75ff-9707-db8909ada878" xlink:href="bbt-20260331.xsd#bbt_CommercialLoansEquipmentFinancingLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:to="loc_bbt_CommercialLoansEquipmentFinancingLoansMember_019cfbf6-4a63-75ff-9707-db8909ada878" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageMember_019cfbf6-4a63-757a-9ce0-a2616537c21f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialMortgageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:to="loc_us-gaap_ResidentialMortgageMember_019cfbf6-4a63-757a-9ce0-a2616537c21f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HomeEquityMember_019cfbf6-4a63-7f9a-8b91-28ec7a475d8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HomeEquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:to="loc_us-gaap_HomeEquityMember_019cfbf6-4a63-7f9a-8b91-28ec7a475d8d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_OtherConsumerMember_019cfbf6-4a63-7ec4-8e1d-8acd1951a1c0" xlink:href="bbt-20260331.xsd#bbt_OtherConsumerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-73a7-9552-98883dda0c38" xlink:to="loc_bbt_OtherConsumerMember_019cfbf6-4a63-7ec4-8e1d-8acd1951a1c0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-4a63-76e6-8a68-063fa5829def" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cfbf6-4a63-7701-b953-765beba94c40" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-4a63-76e6-8a68-063fa5829def" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing_019cfbf6-4a63-7a44-827c-79dfdbfb53a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cfbf6-4a63-7701-b953-765beba94c40" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterest90DaysOrMorePastDueStillAccruing_019cfbf6-4a63-7a44-827c-79dfdbfb53a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_019cfbf6-4a63-7602-a267-5b7b3bf95534" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cfbf6-4a63-7701-b953-765beba94c40" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_019cfbf6-4a63-7602-a267-5b7b3bf95534" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance_019cfbf6-4a63-7e1e-b64d-1c44ade70836" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_019cfbf6-4a63-7701-b953-765beba94c40" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrualNoAllowance_019cfbf6-4a63-7e1e-b64d-1c44ade70836" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/AllowanceforCreditLossesScheduleoftheImpairedandNonImpairedLoansandLeasesByLoanandLeasesClassDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#AllowanceforCreditLossesScheduleoftheImpairedandNonImpairedLoansandLeasesByLoanandLeasesClassDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/AllowanceforCreditLossesScheduleoftheImpairedandNonImpairedLoansandLeasesByLoanandLeasesClassDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableImpairedLineItems_019cfbf6-4a63-70c3-a549-f0abffddc4e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableImpairedLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_019cfbf6-4a63-7b74-bb34-1a0f355bb33c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfImpairedFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_019cfbf6-4a63-70c3-a549-f0abffddc4e7" xlink:to="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_019cfbf6-4a63-7b74-bb34-1a0f355bb33c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-74e6-8488-8cf3f95affe8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfImpairedFinancingReceivableTable_019cfbf6-4a63-7b74-bb34-1a0f355bb33c" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-74e6-8488-8cf3f95affe8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-74e6-8488-8cf3f95affe8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-74e6-8488-8cf3f95affe8" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-74e6-8488-8cf3f95affe8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7aec-9fa7-a8e2feb11a3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_019cfbf6-4a63-74e6-8488-8cf3f95affe8" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7aec-9fa7-a8e2feb11a3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-4a63-73c8-9005-44c83f615da0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstatePortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7aec-9fa7-a8e2feb11a3c" xlink:to="loc_us-gaap_CommercialRealEstatePortfolioSegmentMember_019cfbf6-4a63-73c8-9005-44c83f615da0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-4a63-7e59-9074-3a0315cfde57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7aec-9fa7-a8e2feb11a3c" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_019cfbf6-4a63-7e59-9074-3a0315cfde57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-4a63-7037-9503-8d80df3cae6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsumerPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_019cfbf6-4a63-7aec-9fa7-a8e2feb11a3c" xlink:to="loc_us-gaap_ConsumerPortfolioSegmentMember_019cfbf6-4a63-7037-9503-8d80df3cae6b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_019cfbf6-4a63-741e-b86f-199a64229614" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_019cfbf6-4a63-70c3-a549-f0abffddc4e7" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1_019cfbf6-4a63-741e-b86f-199a64229614" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_019cfbf6-4a63-769c-93fe-b3aa612f2e8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_019cfbf6-4a63-70c3-a549-f0abffddc4e7" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment_019cfbf6-4a63-769c-93fe-b3aa612f2e8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cfbf6-4a63-7b09-9d7e-42f723283ae0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_019cfbf6-4a63-70c3-a549-f0abffddc4e7" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019cfbf6-4a63-7b09-9d7e-42f723283ae0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_019cfbf6-4a63-7f4b-929b-b4d42a946e2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_019cfbf6-4a63-70c3-a549-f0abffddc4e7" xlink:to="loc_us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment_019cfbf6-4a63-7f4b-929b-b4d42a946e2f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_019cfbf6-4a63-7584-b109-6264e84e8275" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_019cfbf6-4a63-70c3-a549-f0abffddc4e7" xlink:to="loc_us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment_019cfbf6-4a63-7584-b109-6264e84e8275" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-4a63-7b90-ba7c-b43e70bed75d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableImpairedLineItems_019cfbf6-4a63-70c3-a549-f0abffddc4e7" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019cfbf6-4a63-7b90-ba7c-b43e70bed75d" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofAmortizedCostBasisofLoanModificationsMadetoBorrowersExperiencingFinancialDifficultyDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#AllowanceforCreditLossesScheduleofAmortizedCostBasisofLoanModificationsMadetoBorrowersExperiencingFinancialDifficultyDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofAmortizedCostBasisofLoanModificationsMadetoBorrowersExperiencingFinancialDifficultyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7465-9daa-5c0e4567db11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModificationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cfbf6-4a63-76ec-87cf-44eaecb87fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7465-9daa-5c0e4567db11" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cfbf6-4a63-76ec-87cf-44eaecb87fd3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-776f-9033-a76bf51719e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cfbf6-4a63-76ec-87cf-44eaecb87fd3" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-776f-9033-a76bf51719e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-776f-9033-a76bf51719e5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-776f-9033-a76bf51719e5" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-776f-9033-a76bf51719e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7d63-bfef-21a7c9eecfbc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-776f-9033-a76bf51719e5" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7d63-bfef-21a7c9eecfbc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialRealEstateRelationshipMember_019ddc10-0c0b-73a7-b0a3-b00ee47deb93" xlink:href="bbt-20260331.xsd#bbt_CommercialRealEstateRelationshipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7d63-bfef-21a7c9eecfbc" xlink:to="loc_bbt_CommercialRealEstateRelationshipMember_019ddc10-0c0b-73a7-b0a3-b00ee47deb93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialAndIndustrialRelationshipsMember_019cfbf6-4a63-7236-8a50-ba3b3a9fc6e6" xlink:href="bbt-20260331.xsd#bbt_CommercialAndIndustrialRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7d63-bfef-21a7c9eecfbc" xlink:to="loc_bbt_CommercialAndIndustrialRelationshipsMember_019cfbf6-4a63-7236-8a50-ba3b3a9fc6e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialLoansEquipmentFinancingLoansMember_019ddc11-bb98-726b-808b-7bd9257d4ddf" xlink:href="bbt-20260331.xsd#bbt_CommercialLoansEquipmentFinancingLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7d63-bfef-21a7c9eecfbc" xlink:to="loc_bbt_CommercialLoansEquipmentFinancingLoansMember_019ddc11-bb98-726b-808b-7bd9257d4ddf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanRestructuringModificationAxis_019cfbf6-4a63-71b6-8367-7133e9c85e3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoanRestructuringModificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cfbf6-4a63-76ec-87cf-44eaecb87fd3" xlink:to="loc_us-gaap_LoanRestructuringModificationAxis_019cfbf6-4a63-71b6-8367-7133e9c85e3e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanRestructuringModificationDomain_019cfbf6-4a63-71b6-8367-7133e9c85e3e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoanRestructuringModificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LoanRestructuringModificationAxis_019cfbf6-4a63-71b6-8367-7133e9c85e3e" xlink:to="loc_us-gaap_LoanRestructuringModificationDomain_019cfbf6-4a63-71b6-8367-7133e9c85e3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanRestructuringModificationDomain_019cfbf6-4a63-7ef3-b4ce-dc14aa842616" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoanRestructuringModificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LoanRestructuringModificationAxis_019cfbf6-4a63-71b6-8367-7133e9c85e3e" xlink:to="loc_us-gaap_LoanRestructuringModificationDomain_019cfbf6-4a63-7ef3-b4ce-dc14aa842616" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExtendedMaturityMember_019cfbf6-4a63-7f6a-adc0-af9e6b069fad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ExtendedMaturityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cfbf6-4a63-7ef3-b4ce-dc14aa842616" xlink:to="loc_us-gaap_ExtendedMaturityMember_019cfbf6-4a63-7f6a-adc0-af9e6b069fad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentDeferralMember_019ddf11-ad49-7e4a-8b27-2554730062d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentDeferralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cfbf6-4a63-7ef3-b4ce-dc14aa842616" xlink:to="loc_us-gaap_PaymentDeferralMember_019ddf11-ad49-7e4a-8b27-2554730062d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CombinationMaturityExtensionAndSignificantPaymentDelaysMember_019cfbf6-4a63-7607-9614-9526933853ef" xlink:href="bbt-20260331.xsd#bbt_CombinationMaturityExtensionAndSignificantPaymentDelaysMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cfbf6-4a63-7ef3-b4ce-dc14aa842616" xlink:to="loc_bbt_CombinationMaturityExtensionAndSignificantPaymentDelaysMember_019cfbf6-4a63-7607-9614-9526933853ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CombinationPaymentDeferralAndInterestRateReductionMember_019ddc15-187a-7a5b-b3d3-b674d04b24b1" xlink:href="bbt-20260331.xsd#bbt_CombinationPaymentDeferralAndInterestRateReductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanRestructuringModificationDomain_019cfbf6-4a63-7ef3-b4ce-dc14aa842616" xlink:to="loc_bbt_CombinationPaymentDeferralAndInterestRateReductionMember_019ddc15-187a-7a5b-b3d3-b674d04b24b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanModifiedAxis_019cfbf6-4a63-75bb-81c8-1cc9093c4d2c" xlink:href="bbt-20260331.xsd#bbt_LoanModifiedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cfbf6-4a63-76ec-87cf-44eaecb87fd3" xlink:to="loc_bbt_LoanModifiedAxis_019cfbf6-4a63-75bb-81c8-1cc9093c4d2c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanModifiedDomain_019cfbf6-4a63-75bb-81c8-1cc9093c4d2c_default" xlink:href="bbt-20260331.xsd#bbt_LoanModifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_bbt_LoanModifiedAxis_019cfbf6-4a63-75bb-81c8-1cc9093c4d2c" xlink:to="loc_bbt_LoanModifiedDomain_019cfbf6-4a63-75bb-81c8-1cc9093c4d2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanModifiedDomain_019cfbf6-4a63-7d17-8cae-ca8d804d7bdd" xlink:href="bbt-20260331.xsd#bbt_LoanModifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_bbt_LoanModifiedAxis_019cfbf6-4a63-75bb-81c8-1cc9093c4d2c" xlink:to="loc_bbt_LoanModifiedDomain_019cfbf6-4a63-7d17-8cae-ca8d804d7bdd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanTrancheOneMember_019cfbf6-4a63-79a6-9277-e26eb659909b" xlink:href="bbt-20260331.xsd#bbt_LoanTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanModifiedDomain_019cfbf6-4a63-7d17-8cae-ca8d804d7bdd" xlink:to="loc_bbt_LoanTrancheOneMember_019cfbf6-4a63-79a6-9277-e26eb659909b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanTrancheTwoMember_019cfbf6-4a63-7c0d-891f-ae42ead023a6" xlink:href="bbt-20260331.xsd#bbt_LoanTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanModifiedDomain_019cfbf6-4a63-7d17-8cae-ca8d804d7bdd" xlink:to="loc_bbt_LoanTrancheTwoMember_019cfbf6-4a63-7c0d-891f-ae42ead023a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancingReceivableNumberOfLoansModified_019cfbf6-4a63-7a60-a6fd-3bcf0825c2c0" xlink:href="bbt-20260331.xsd#bbt_FinancingReceivableNumberOfLoansModified"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7465-9daa-5c0e4567db11" xlink:to="loc_bbt_FinancingReceivableNumberOfLoansModified_019cfbf6-4a63-7a60-a6fd-3bcf0825c2c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod_019cfbf6-4a63-7ba6-9198-de858b59494e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7465-9daa-5c0e4567db11" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod_019cfbf6-4a63-7ba6-9198-de858b59494e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent_019cfbf6-4a63-7152-bc38-7aafdd57bc9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7465-9daa-5c0e4567db11" xlink:to="loc_us-gaap_FinancingReceivableModificationToTotalFinancingReceivablesExcludingAccruedInterestPercent_019cfbf6-4a63-7152-bc38-7aafdd57bc9a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification_019cfbf6-4a63-729e-80fe-72841e095dfc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7465-9daa-5c0e4567db11" xlink:to="loc_us-gaap_FinancingReceivableModifiedWeightedAverageTermIncreaseFromModification_019cfbf6-4a63-729e-80fe-72841e095dfc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification_019e00af-33ca-7ba0-bc30-30e783278062" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7465-9daa-5c0e4567db11" xlink:to="loc_us-gaap_FinancingReceivableModifiedWeightedAverageInterestRateDecreaseFromModification_019e00af-33ca-7ba0-bc30-30e783278062" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModifiedPaymentDeferralPeriod_019e028e-baf2-7b71-b963-bd6d314bbda5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModifiedPaymentDeferralPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7465-9daa-5c0e4567db11" xlink:to="loc_us-gaap_FinancingReceivableModifiedPaymentDeferralPeriod_019e028e-baf2-7b71-b963-bd6d314bbda5" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofAgingAnalysisofLoanModificationsMadetoBorrowersExperiencingFinancialDifficultyDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#AllowanceforCreditLossesScheduleofAgingAnalysisofLoanModificationsMadetoBorrowersExperiencingFinancialDifficultyDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/AllowanceforCreditLossesScheduleofAgingAnalysisofLoanModificationsMadetoBorrowersExperiencingFinancialDifficultyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7d72-bb58-fe660e3e5349" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableModificationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cfbf6-4a63-7d29-b332-79b94e52e420" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7d72-bb58-fe660e3e5349" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cfbf6-4a63-7d29-b332-79b94e52e420" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7544-9625-7ded47519b2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cfbf6-4a63-7d29-b332-79b94e52e420" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7544-9625-7ded47519b2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7544-9625-7ded47519b2f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7544-9625-7ded47519b2f" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7544-9625-7ded47519b2f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7bcf-8303-55f3a0519c6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019cfbf6-4a63-7544-9625-7ded47519b2f" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7bcf-8303-55f3a0519c6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommercialAndIndustrialRelationshipsMember_019cfbf6-4a63-758e-b6e9-9920b04bd741" xlink:href="bbt-20260331.xsd#bbt_CommercialAndIndustrialRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019cfbf6-4a63-7bcf-8303-55f3a0519c6c" xlink:to="loc_bbt_CommercialAndIndustrialRelationshipsMember_019cfbf6-4a63-758e-b6e9-9920b04bd741" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cfbf6-4a63-7191-9595-80c1f29a3040" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableTroubledDebtRestructuringsTable_019cfbf6-4a63-7d29-b332-79b94e52e420" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cfbf6-4a63-7191-9595-80c1f29a3040" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-7191-9595-80c1f29a3040_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cfbf6-4a63-7191-9595-80c1f29a3040" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-7191-9595-80c1f29a3040_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-79e1-b793-cdadd8511136" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019cfbf6-4a63-7191-9595-80c1f29a3040" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-79e1-b793-cdadd8511136" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetNotPastDueMember_019cfbf6-4a63-76aa-a374-ee10f61a356a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialAssetNotPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-79e1-b793-cdadd8511136" xlink:to="loc_us-gaap_FinancialAssetNotPastDueMember_019cfbf6-4a63-76aa-a374-ee10f61a356a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancialAsset30To60DaysPastDueMember_019cfbf6-4a63-7c29-82da-6cceed974e92" xlink:href="bbt-20260331.xsd#bbt_FinancialAsset30To60DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-79e1-b793-cdadd8511136" xlink:to="loc_bbt_FinancialAsset30To60DaysPastDueMember_019cfbf6-4a63-7c29-82da-6cceed974e92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FinancialAsset61To90DaysPastDueMember_019cfbf6-4a63-7828-896e-fd89491029fd" xlink:href="bbt-20260331.xsd#bbt_FinancialAsset61To90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-79e1-b793-cdadd8511136" xlink:to="loc_bbt_FinancialAsset61To90DaysPastDueMember_019cfbf6-4a63-7828-896e-fd89491029fd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_019cfbf6-4a63-71e9-aaf4-69db49922ac3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019cfbf6-4a63-79e1-b793-cdadd8511136" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_019cfbf6-4a63-71e9-aaf4-69db49922ac3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod_019cfbf6-4a63-7bcf-bf99-aa44926cfc2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableModificationsLineItems_019cfbf6-4a63-7d72-bb58-fe660e3e5349" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestModifiedPeriod_019cfbf6-4a63-7bcf-bf99-aa44926cfc2d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/GoodwillandOtherIntangibleAssetsScheduleofGoodwillandOtherIntangibleAssetsDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#GoodwillandOtherIntangibleAssetsScheduleofGoodwillandOtherIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/GoodwillandOtherIntangibleAssetsScheduleofGoodwillandOtherIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cfbf6-4a63-7203-99f4-e61d5161aea9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cfbf6-4a63-7eae-ba1a-371d1ba2d496" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cfbf6-4a63-7203-99f4-e61d5161aea9" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cfbf6-4a63-7eae-ba1a-371d1ba2d496" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cfbf6-4a63-7df7-9986-dee67e90d68f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cfbf6-4a63-7eae-ba1a-371d1ba2d496" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cfbf6-4a63-7df7-9986-dee67e90d68f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cfbf6-4a63-7df7-9986-dee67e90d68f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cfbf6-4a63-7df7-9986-dee67e90d68f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cfbf6-4a63-7df7-9986-dee67e90d68f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cfbf6-4a63-79e7-a013-17996f87f348" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cfbf6-4a63-7df7-9986-dee67e90d68f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cfbf6-4a63-79e7-a013-17996f87f348" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CoreDepositsMember_019cfbf6-4a63-7131-a90d-6838376add95" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CoreDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cfbf6-4a63-79e7-a013-17996f87f348" xlink:to="loc_us-gaap_CoreDepositsMember_019cfbf6-4a63-7131-a90d-6838376add95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019d6673-8bba-740e-8894-7ec4484cac92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cfbf6-4a63-79e7-a013-17996f87f348" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019d6673-8bba-740e-8894-7ec4484cac92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_019cfbf6-4a63-7e0a-845a-e906e3e08ce7" 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_FiniteLivedIntangibleAssetsLineItems_019cfbf6-4a63-7203-99f4-e61d5161aea9" xlink:to="loc_us-gaap_GoodwillRollForward_019cfbf6-4a63-7e0a-845a-e906e3e08ce7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019cfbf6-4a63-7256-bbe1-5cad786e3e3d" 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_019cfbf6-4a63-7e0a-845a-e906e3e08ce7" xlink:to="loc_us-gaap_Goodwill_019cfbf6-4a63-7256-bbe1-5cad786e3e3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_019cfbf6-4a63-7cd3-af18-b23b37fba1df" 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_019cfbf6-4a63-7e0a-845a-e906e3e08ce7" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_019cfbf6-4a63-7cd3-af18-b23b37fba1df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019cfbf6-4a63-7fc6-a2a2-533b3ca85c7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cfbf6-4a63-70ed-8229-68eed0b89e43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cfbf6-4a63-7203-99f4-e61d5161aea9" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019cfbf6-4a63-70ed-8229-68eed0b89e43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_019cfbf6-4a63-78db-b3ee-9ea389fa5d0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cfbf6-4a63-7203-99f4-e61d5161aea9" xlink:to="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_019cfbf6-4a63-78db-b3ee-9ea389fa5d0e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#AccumulatedOtherComprehensiveIncomeLossDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/AccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019cfbf6-4a63-793b-906e-e14dc4394600" 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_019cfbf6-4a63-7a35-a27c-f69b914eec05" 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_019cfbf6-4a63-793b-906e-e14dc4394600" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019cfbf6-4a63-7a35-a27c-f69b914eec05" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cfbf6-4a63-7f3a-803d-bb1a704eccf0" 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_019cfbf6-4a63-7a35-a27c-f69b914eec05" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cfbf6-4a63-7f3a-803d-bb1a704eccf0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cfbf6-4a63-7f3a-803d-bb1a704eccf0_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_019cfbf6-4a63-7f3a-803d-bb1a704eccf0" xlink:to="loc_us-gaap_EquityComponentDomain_019cfbf6-4a63-7f3a-803d-bb1a704eccf0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cfbf6-4a63-7878-a562-2ed935348dc2" 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_019cfbf6-4a63-7f3a-803d-bb1a704eccf0" xlink:to="loc_us-gaap_EquityComponentDomain_019cfbf6-4a63-7878-a562-2ed935348dc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cfbf6-4a63-7016-a366-fc8bdc8956bd" 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_019cfbf6-4a63-7878-a562-2ed935348dc2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cfbf6-4a63-7016-a366-fc8bdc8956bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_019cfbf6-4a63-785d-9579-1d1424e5f475" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cfbf6-4a63-7016-a366-fc8bdc8956bd" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_019cfbf6-4a63-785d-9579-1d1424e5f475" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_019cfbf6-4a63-7e7a-aa76-3c12b464606f" 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_AccumulatedOtherComprehensiveIncomeMember_019cfbf6-4a63-7016-a366-fc8bdc8956bd" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_019cfbf6-4a63-7e7a-aa76-3c12b464606f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_019cfbf6-4a63-7a27-bb89-e184e86f17da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cfbf6-4a63-7016-a366-fc8bdc8956bd" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_019cfbf6-4a63-7a27-bb89-e184e86f17da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019cfbf6-4a63-7d96-961c-6c7ee04d1fe6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019cfbf6-4a63-793b-906e-e14dc4394600" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019cfbf6-4a63-7d96-961c-6c7ee04d1fe6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cfbf6-4a63-7949-800e-ca328d8cff03" 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_AOCIAttributableToParentNetOfTaxRollForward_019cfbf6-4a63-7d96-961c-6c7ee04d1fe6" xlink:to="loc_us-gaap_StockholdersEquity_019cfbf6-4a63-7949-800e-ca328d8cff03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_019cfbf6-4a63-75f1-b388-12bbf6592fe3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019cfbf6-4a63-7d96-961c-6c7ee04d1fe6" xlink:to="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_019cfbf6-4a63-75f1-b388-12bbf6592fe3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_019d3f92-4cf5-7065-aa7b-390b824ab272" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019cfbf6-4a63-7d96-961c-6c7ee04d1fe6" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_019d3f92-4cf5-7065-aa7b-390b824ab272" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cfbf6-4a63-7330-94b0-453666bc83b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/DerivativesandHedgingActivitiesScheduleofHedgedForecastedTransactionAffectsEarningsDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#DerivativesandHedgingActivitiesScheduleofHedgedForecastedTransactionAffectsEarningsDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/DerivativesandHedgingActivitiesScheduleofHedgedForecastedTransactionAffectsEarningsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cfbf6-4a63-73ef-a54c-61234665f704" 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_019cfbf6-4a63-7049-92d2-d90d45e6b648" 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_019cfbf6-4a63-73ef-a54c-61234665f704" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cfbf6-4a63-7049-92d2-d90d45e6b648" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cfbf6-4a63-727f-9491-282dd574e1e4" 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_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cfbf6-4a63-7049-92d2-d90d45e6b648" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cfbf6-4a63-727f-9491-282dd574e1e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-727f-9491-282dd574e1e4_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_019cfbf6-4a63-727f-9491-282dd574e1e4" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-727f-9491-282dd574e1e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7d38-9b3c-b21e5d373f35" 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_019cfbf6-4a63-727f-9491-282dd574e1e4" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7d38-9b3c-b21e5d373f35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019cfbf6-4a63-735e-9977-ac49afa28c45" 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_019cfbf6-4a63-7d38-9b3c-b21e5d373f35" xlink:to="loc_us-gaap_InterestRateSwapMember_019cfbf6-4a63-735e-9977-ac49afa28c45" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019cfbf6-4a63-73ed-93df-d1c703348677" 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_DerivativeInstrumentsGainLossLineItems_019cfbf6-4a63-73ef-a54c-61234665f704" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019cfbf6-4a63-73ed-93df-d1c703348677" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAverageRemainingMaturity1_019cfbf6-4a63-7e1d-8434-0d0069761628" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAverageRemainingMaturity1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cfbf6-4a63-73ef-a54c-61234665f704" xlink:to="loc_us-gaap_DerivativeAverageRemainingMaturity1_019cfbf6-4a63-7e1d-8434-0d0069761628" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeSwaptionInterestRate_019cfbf6-4a63-7bd1-ad50-01bb0c297b75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeSwaptionInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cfbf6-4a63-73ef-a54c-61234665f704" xlink:to="loc_us-gaap_DerivativeSwaptionInterestRate_019cfbf6-4a63-7bd1-ad50-01bb0c297b75" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAverageSwaptionInterestRate_019cfbf6-4a63-7103-9d03-2ec88878e5b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAverageSwaptionInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cfbf6-4a63-73ef-a54c-61234665f704" xlink:to="loc_us-gaap_DerivativeAverageSwaptionInterestRate_019cfbf6-4a63-7103-9d03-2ec88878e5b2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_019cfbf6-4a63-77bf-a67b-f883250c8cf0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cfbf6-4a63-73ef-a54c-61234665f704" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_019cfbf6-4a63-77bf-a67b-f883250c8cf0" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/DerivativesandHedgingActivitiesScheduleofCustomerRelatedDerivativePositionsDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#DerivativesandHedgingActivitiesScheduleofCustomerRelatedDerivativePositionsDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/DerivativesandHedgingActivitiesScheduleofCustomerRelatedDerivativePositionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019cfbf6-4a63-7058-9152-a5196ba27cb9" 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_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cfbf6-4a63-7e7e-8c4a-8c958c52ceb1" 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_DerivativeLineItems_019cfbf6-4a63-7058-9152-a5196ba27cb9" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cfbf6-4a63-7e7e-8c4a-8c958c52ceb1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019cfbf6-4a63-7a7b-a09b-0a04fa830cac" 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_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cfbf6-4a63-7e7e-8c4a-8c958c52ceb1" xlink:to="loc_us-gaap_HedgingDesignationAxis_019cfbf6-4a63-7a7b-a09b-0a04fa830cac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cfbf6-4a63-7a7b-a09b-0a04fa830cac_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_019cfbf6-4a63-7a7b-a09b-0a04fa830cac" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cfbf6-4a63-7a7b-a09b-0a04fa830cac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cfbf6-4a63-7c32-b82c-a557ed1011b4" 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_019cfbf6-4a63-7a7b-a09b-0a04fa830cac" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cfbf6-4a63-7c32-b82c-a557ed1011b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019cfbf6-4a63-77f9-862d-5909f40dcac0" 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_019cfbf6-4a63-7c32-b82c-a557ed1011b4" xlink:to="loc_us-gaap_NondesignatedMember_019cfbf6-4a63-77f9-862d-5909f40dcac0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cfbf6-4a63-7b15-a45c-0c2a96bbb3cf" 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_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cfbf6-4a63-7e7e-8c4a-8c958c52ceb1" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cfbf6-4a63-7b15-a45c-0c2a96bbb3cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7b15-a45c-0c2a96bbb3cf_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_019cfbf6-4a63-7b15-a45c-0c2a96bbb3cf" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7b15-a45c-0c2a96bbb3cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7acf-b21f-5c7e2238f7df" 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_019cfbf6-4a63-7b15-a45c-0c2a96bbb3cf" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7acf-b21f-5c7e2238f7df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanLevelDerivativeReceiveFixedPayVariableMember_019cfbf6-4a63-724d-b355-3d1b91f391f5" xlink:href="bbt-20260331.xsd#bbt_LoanLevelDerivativeReceiveFixedPayVariableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7acf-b21f-5c7e2238f7df" xlink:to="loc_bbt_LoanLevelDerivativeReceiveFixedPayVariableMember_019cfbf6-4a63-724d-b355-3d1b91f391f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanLevelDerivativePayFixedReceiveVariableMember_019cfbf6-4a63-725c-bf7b-1fade445b47f" xlink:href="bbt-20260331.xsd#bbt_LoanLevelDerivativePayFixedReceiveVariableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7acf-b21f-5c7e2238f7df" xlink:to="loc_bbt_LoanLevelDerivativePayFixedReceiveVariableMember_019cfbf6-4a63-725c-bf7b-1fade445b47f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_RiskParticipationoutAgreementMember_019cfbf6-4a63-7787-a807-0f252a47f77e" xlink:href="bbt-20260331.xsd#bbt_RiskParticipationoutAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7acf-b21f-5c7e2238f7df" xlink:to="loc_bbt_RiskParticipationoutAgreementMember_019cfbf6-4a63-7787-a807-0f252a47f77e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_RiskParticipationinAgreementMember_019cfbf6-4a63-7451-b0cb-7c36ac9027a2" xlink:href="bbt-20260331.xsd#bbt_RiskParticipationinAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7acf-b21f-5c7e2238f7df" xlink:to="loc_bbt_RiskParticipationinAgreementMember_019cfbf6-4a63-7451-b0cb-7c36ac9027a2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019cfbf6-4a63-7c11-942e-37a0044976d7" 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_019cfbf6-4a63-7acf-b21f-5c7e2238f7df" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019cfbf6-4a63-7c11-942e-37a0044976d7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionAxis_019cfbf6-4a63-7e9b-ad8e-e67961316559" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cfbf6-4a63-7e7e-8c4a-8c958c52ceb1" xlink:to="loc_us-gaap_PositionAxis_019cfbf6-4a63-7e9b-ad8e-e67961316559" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019cfbf6-4a63-7e9b-ad8e-e67961316559_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PositionAxis_019cfbf6-4a63-7e9b-ad8e-e67961316559" xlink:to="loc_us-gaap_PositionDomain_019cfbf6-4a63-7e9b-ad8e-e67961316559_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019cfbf6-4a63-771c-b13c-cef2b98d6b53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PositionAxis_019cfbf6-4a63-7e9b-ad8e-e67961316559" xlink:to="loc_us-gaap_PositionDomain_019cfbf6-4a63-771c-b13c-cef2b98d6b53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongMember_019cfbf6-4a63-7de6-b19d-f8a398329f2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019cfbf6-4a63-771c-b13c-cef2b98d6b53" xlink:to="loc_us-gaap_LongMember_019cfbf6-4a63-7de6-b19d-f8a398329f2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortMember_019cfbf6-4a63-79b8-9144-bf1d53caf1e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019cfbf6-4a63-771c-b13c-cef2b98d6b53" xlink:to="loc_us-gaap_ShortMember_019cfbf6-4a63-79b8-9144-bf1d53caf1e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfInterestRateDerivativesHeld_019cfbf6-4a63-7d6b-a30a-20fddf46a5e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfInterestRateDerivativesHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cfbf6-4a63-7058-9152-a5196ba27cb9" xlink:to="loc_us-gaap_NumberOfInterestRateDerivativesHeld_019cfbf6-4a63-7d6b-a30a-20fddf46a5e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DerivativeNotionalAmountMaturingInNextTwelveMonths_019cfbf6-4a63-7ad1-846e-fd5181c1c880" xlink:href="bbt-20260331.xsd#bbt_DerivativeNotionalAmountMaturingInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cfbf6-4a63-7058-9152-a5196ba27cb9" xlink:to="loc_bbt_DerivativeNotionalAmountMaturingInNextTwelveMonths_019cfbf6-4a63-7ad1-846e-fd5181c1c880" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DerivativeNotionalAmountMaturingInTwoYears_019cfbf6-4a63-7add-b6ac-5a4cffb83bdd" xlink:href="bbt-20260331.xsd#bbt_DerivativeNotionalAmountMaturingInTwoYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cfbf6-4a63-7058-9152-a5196ba27cb9" xlink:to="loc_bbt_DerivativeNotionalAmountMaturingInTwoYears_019cfbf6-4a63-7add-b6ac-5a4cffb83bdd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DerivativeNotionalAmountMaturingInThreeYears_019cfbf6-4a63-7f76-872d-1a5928afe8d7" xlink:href="bbt-20260331.xsd#bbt_DerivativeNotionalAmountMaturingInThreeYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cfbf6-4a63-7058-9152-a5196ba27cb9" xlink:to="loc_bbt_DerivativeNotionalAmountMaturingInThreeYears_019cfbf6-4a63-7f76-872d-1a5928afe8d7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DerivativeNotionalAmountMaturingInFourYears_019cfbf6-4a63-7f89-b9c7-47cfa96e9c7e" xlink:href="bbt-20260331.xsd#bbt_DerivativeNotionalAmountMaturingInFourYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cfbf6-4a63-7058-9152-a5196ba27cb9" xlink:to="loc_bbt_DerivativeNotionalAmountMaturingInFourYears_019cfbf6-4a63-7f89-b9c7-47cfa96e9c7e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DerivativeNotionalAmountMaturingAfterFourYears_019cfbf6-4a63-7908-9434-69b5a43d8c4b" xlink:href="bbt-20260331.xsd#bbt_DerivativeNotionalAmountMaturingAfterFourYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cfbf6-4a63-7058-9152-a5196ba27cb9" xlink:to="loc_bbt_DerivativeNotionalAmountMaturingAfterFourYears_019cfbf6-4a63-7908-9434-69b5a43d8c4b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019cfbf6-4a63-7510-8e8d-eeca5c73f238" 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_019cfbf6-4a63-7058-9152-a5196ba27cb9" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019cfbf6-4a63-7510-8e8d-eeca5c73f238" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_019cfbf6-4a63-7078-bbdf-21cb5812e819" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cfbf6-4a63-7058-9152-a5196ba27cb9" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_019cfbf6-4a63-7078-bbdf-21cb5812e819" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/DerivativesandHedgingActivitiesScheduleofOffsettingDerivativesandAmountsSubjecttoMasterNettingAgreementsNotOffsetintheAuditedConsolidatedBalanceSheetDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#DerivativesandHedgingActivitiesScheduleofOffsettingDerivativesandAmountsSubjecttoMasterNettingAgreementsNotOffsetintheAuditedConsolidatedBalanceSheetDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/DerivativesandHedgingActivitiesScheduleofOffsettingDerivativesandAmountsSubjecttoMasterNettingAgreementsNotOffsetintheAuditedConsolidatedBalanceSheetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019cfbf6-4a63-7ade-9444-c3b421eb2fd1" 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_019cfbf6-4a63-758e-8bfb-c562fab5ee17" 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_019cfbf6-4a63-7ade-9444-c3b421eb2fd1" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cfbf6-4a63-758e-8bfb-c562fab5ee17" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019cfbf6-4a63-75cc-b784-3fe4da412131" 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_019cfbf6-4a63-758e-8bfb-c562fab5ee17" xlink:to="loc_us-gaap_HedgingDesignationAxis_019cfbf6-4a63-75cc-b784-3fe4da412131" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cfbf6-4a63-75cc-b784-3fe4da412131_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_019cfbf6-4a63-75cc-b784-3fe4da412131" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cfbf6-4a63-75cc-b784-3fe4da412131_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cfbf6-4a63-7cc4-9504-b05f493d34e8" 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_019cfbf6-4a63-75cc-b784-3fe4da412131" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cfbf6-4a63-7cc4-9504-b05f493d34e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019cfbf6-4a63-709c-824a-6a1ec4bcaa2a" 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_019cfbf6-4a63-7cc4-9504-b05f493d34e8" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019cfbf6-4a63-709c-824a-6a1ec4bcaa2a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019cfbf6-4a63-7461-978b-7dfeb341b079" 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_019cfbf6-4a63-7cc4-9504-b05f493d34e8" xlink:to="loc_us-gaap_NondesignatedMember_019cfbf6-4a63-7461-978b-7dfeb341b079" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cfbf6-4a63-7314-8f74-96a65d762878" 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_019cfbf6-4a63-758e-8bfb-c562fab5ee17" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cfbf6-4a63-7314-8f74-96a65d762878" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7314-8f74-96a65d762878_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_019cfbf6-4a63-7314-8f74-96a65d762878" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7314-8f74-96a65d762878_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7ab6-9ad9-db15ad931c78" 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_019cfbf6-4a63-7314-8f74-96a65d762878" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7ab6-9ad9-db15ad931c78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019cfbf6-4a63-7bdb-89b3-c6debfc68771" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7ab6-9ad9-db15ad931c78" xlink:to="loc_us-gaap_InterestRateContractMember_019cfbf6-4a63-7bdb-89b3-c6debfc68771" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanLevelDerivativeMember_019cfbf6-4a63-720d-961f-e944fc796422" xlink:href="bbt-20260331.xsd#bbt_LoanLevelDerivativeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7ab6-9ad9-db15ad931c78" xlink:to="loc_bbt_LoanLevelDerivativeMember_019cfbf6-4a63-720d-961f-e944fc796422" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_RiskParticipationoutAgreementMember_019cfbf6-4a63-77ab-a3ee-63328cc586eb" xlink:href="bbt-20260331.xsd#bbt_RiskParticipationoutAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7ab6-9ad9-db15ad931c78" xlink:to="loc_bbt_RiskParticipationoutAgreementMember_019cfbf6-4a63-77ab-a3ee-63328cc586eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_RiskParticipationinAgreementMember_019cfbf6-4a63-75a1-8af5-5a706c680776" xlink:href="bbt-20260331.xsd#bbt_RiskParticipationinAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7ab6-9ad9-db15ad931c78" xlink:to="loc_bbt_RiskParticipationinAgreementMember_019cfbf6-4a63-75a1-8af5-5a706c680776" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019cfbf6-4a63-76b7-b1dc-1fe9555e53bb" 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_019cfbf6-4a63-7ab6-9ad9-db15ad931c78" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019cfbf6-4a63-76b7-b1dc-1fe9555e53bb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019cfbf6-4a63-7999-a704-b34f9f14c10b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingDerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cfbf6-4a63-7ade-9444-c3b421eb2fd1" xlink:to="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019cfbf6-4a63-7999-a704-b34f9f14c10b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cfbf6-4a63-759e-96cb-25c015dabe4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019cfbf6-4a63-7999-a704-b34f9f14c10b" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cfbf6-4a63-759e-96cb-25c015dabe4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019cfbf6-4a63-7d04-bdeb-1a3fee0af6f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019cfbf6-4a63-7999-a704-b34f9f14c10b" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019cfbf6-4a63-7d04-bdeb-1a3fee0af6f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019cfbf6-4a63-78a3-8aa0-25b286064e21" 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_OffsettingDerivativeAssetsAbstract_019cfbf6-4a63-7999-a704-b34f9f14c10b" xlink:to="loc_us-gaap_DerivativeAssets_019cfbf6-4a63-78a3-8aa0-25b286064e21" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction_019cfbf6-4a63-7b48-a277-12588ee2612d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019cfbf6-4a63-7999-a704-b34f9f14c10b" xlink:to="loc_us-gaap_DerivativeAssetNotOffsetPolicyElectionDeduction_019cfbf6-4a63-7b48-a277-12588ee2612d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCollateralObligationToReturnCash_019cfbf6-4a63-7454-998a-9e2befd99951" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeCollateralObligationToReturnCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019cfbf6-4a63-7999-a704-b34f9f14c10b" xlink:to="loc_us-gaap_DerivativeCollateralObligationToReturnCash_019cfbf6-4a63-7454-998a-9e2befd99951" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_019cfbf6-4a63-7934-8d92-bcd5489203c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019cfbf6-4a63-7999-a704-b34f9f14c10b" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_019cfbf6-4a63-7934-8d92-bcd5489203c6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019cfbf6-4a63-70b8-a8d2-10b933519ea8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingDerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cfbf6-4a63-7ade-9444-c3b421eb2fd1" xlink:to="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019cfbf6-4a63-70b8-a8d2-10b933519ea8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cfbf6-4a63-76ce-b7d5-20d794c0661f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019cfbf6-4a63-70b8-a8d2-10b933519ea8" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cfbf6-4a63-76ce-b7d5-20d794c0661f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019cfbf6-4a63-7cc1-858f-5191dc7ca029" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityFairValueGrossAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019cfbf6-4a63-70b8-a8d2-10b933519ea8" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019cfbf6-4a63-7cc1-858f-5191dc7ca029" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019cfbf6-4a63-742e-9d52-2df2bd7c3c76" 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_OffsettingDerivativeLiabilitiesAbstract_019cfbf6-4a63-70b8-a8d2-10b933519ea8" xlink:to="loc_us-gaap_DerivativeLiabilities_019cfbf6-4a63-742e-9d52-2df2bd7c3c76" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction_019cfbf6-4a63-784c-8d45-3d309511a427" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019cfbf6-4a63-70b8-a8d2-10b933519ea8" xlink:to="loc_us-gaap_DerivativeLiabilityNotOffsetPolicyElectionDeduction_019cfbf6-4a63-784c-8d45-3d309511a427" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeCollateralRightToReclaimCash_019cfbf6-4a63-7290-85ae-dbe3babb33f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeCollateralRightToReclaimCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019cfbf6-4a63-70b8-a8d2-10b933519ea8" xlink:to="loc_us-gaap_DerivativeCollateralRightToReclaimCash_019cfbf6-4a63-7290-85ae-dbe3babb33f1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral_019cfbf6-4a63-7006-8805-83f98c1114d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019cfbf6-4a63-70b8-a8d2-10b933519ea8" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral_019cfbf6-4a63-7006-8805-83f98c1114d6" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/StockBasedCompensationDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#StockBasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/StockBasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cfbf6-4a63-71cb-a9a9-e7c46707b709" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cfbf6-4a63-73f3-b17f-d29263428b07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cfbf6-4a63-71cb-a9a9-e7c46707b709" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cfbf6-4a63-73f3-b17f-d29263428b07" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019cfbf6-4a63-78a9-b66f-0ab64d3e899a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cfbf6-4a63-73f3-b17f-d29263428b07" xlink:to="loc_us-gaap_AwardTypeAxis_019cfbf6-4a63-78a9-b66f-0ab64d3e899a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cfbf6-4a63-78a9-b66f-0ab64d3e899a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019cfbf6-4a63-78a9-b66f-0ab64d3e899a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cfbf6-4a63-78a9-b66f-0ab64d3e899a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cfbf6-4a63-775b-b06d-71f11bd0b145" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019cfbf6-4a63-78a9-b66f-0ab64d3e899a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cfbf6-4a63-775b-b06d-71f11bd0b145" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_TimebasedAwardsMember_019cfbf6-4a63-76c7-a66c-6bd3531b92ca" xlink:href="bbt-20260331.xsd#bbt_TimebasedAwardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019cfbf6-4a63-775b-b06d-71f11bd0b145" xlink:to="loc_bbt_TimebasedAwardsMember_019cfbf6-4a63-76c7-a66c-6bd3531b92ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusAxis_019cfbf6-4a63-7d14-a11f-c628f2561a59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GranteeStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cfbf6-4a63-73f3-b17f-d29263428b07" xlink:to="loc_us-gaap_GranteeStatusAxis_019cfbf6-4a63-7d14-a11f-c628f2561a59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_019cfbf6-4a63-7d14-a11f-c628f2561a59_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GranteeStatusAxis_019cfbf6-4a63-7d14-a11f-c628f2561a59" xlink:to="loc_us-gaap_GranteeStatusDomain_019cfbf6-4a63-7d14-a11f-c628f2561a59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_019cfbf6-4a63-7106-b359-32e1c44412d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GranteeStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GranteeStatusAxis_019cfbf6-4a63-7d14-a11f-c628f2561a59" xlink:to="loc_us-gaap_GranteeStatusDomain_019cfbf6-4a63-7106-b359-32e1c44412d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedPaymentArrangementEmployeeMember_019cfbf6-4a63-7b7c-80ae-191ced04e8ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedPaymentArrangementEmployeeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_019cfbf6-4a63-7106-b359-32e1c44412d1" xlink:to="loc_us-gaap_ShareBasedPaymentArrangementEmployeeMember_019cfbf6-4a63-7b7c-80ae-191ced04e8ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019d668b-befb-74f5-8b22-ba7daa4ac38c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019cfbf6-4a63-73f3-b17f-d29263428b07" xlink:to="loc_us-gaap_VestingAxis_019d668b-befb-74f5-8b22-ba7daa4ac38c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019d668b-befb-74f5-8b22-ba7daa4ac38c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019d668b-befb-74f5-8b22-ba7daa4ac38c" xlink:to="loc_us-gaap_VestingDomain_019d668b-befb-74f5-8b22-ba7daa4ac38c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019d668b-befb-782d-9306-9ef820933fe1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019d668b-befb-74f5-8b22-ba7daa4ac38c" xlink:to="loc_us-gaap_VestingDomain_019d668b-befb-782d-9306-9ef820933fe1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019d668b-befb-73d8-8b06-58cf68949d32" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019d668b-befb-782d-9306-9ef820933fe1" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019d668b-befb-73d8-8b06-58cf68949d32" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019d668b-befb-7ef0-827d-9a8614aa0614" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019d668b-befb-782d-9306-9ef820933fe1" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019d668b-befb-7ef0-827d-9a8614aa0614" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfActivePlans_019cfbf6-4a63-7a10-9c81-2064005e6d0c" xlink:href="bbt-20260331.xsd#bbt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfActivePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cfbf6-4a63-71cb-a9a9-e7c46707b709" xlink:to="loc_bbt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfActivePlans_019cfbf6-4a63-7a10-9c81-2064005e6d0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019cfbf6-4a63-75f3-90c4-ab552031b4e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cfbf6-4a63-71cb-a9a9-e7c46707b709" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019cfbf6-4a63-75f3-90c4-ab552031b4e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019d668b-befb-7a64-ad5e-a640c37e5369" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cfbf6-4a63-71cb-a9a9-e7c46707b709" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019d668b-befb-7a64-ad5e-a640c37e5369" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_019cfbf6-4a63-7721-9f22-a3c740ac6dad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cfbf6-4a63-71cb-a9a9-e7c46707b709" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_019cfbf6-4a63-7721-9f22-a3c740ac6dad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019cfbf6-4a63-7e96-af31-2c1159ba3058" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019cfbf6-4a63-71cb-a9a9-e7c46707b709" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019cfbf6-4a63-7e96-af31-2c1159ba3058" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#FairValueofFinancialInstrumentsScheduleofFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofFairValueAssetsandLiabilitiesMeasuredonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cfbf6-4a63-7e06-83ff-f1b8363cc5a0" 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_019cfbf6-4a63-7392-a779-44833838fc24" 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_019cfbf6-4a63-7e06-83ff-f1b8363cc5a0" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cfbf6-4a63-7392-a779-44833838fc24" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-73ee-ba3a-41738ddfc063" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cfbf6-4a63-7392-a779-44833838fc24" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-73ee-ba3a-41738ddfc063" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-73ee-ba3a-41738ddfc063_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-73ee-ba3a-41738ddfc063" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-73ee-ba3a-41738ddfc063_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7673-af05-ad8520f6c3e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-73ee-ba3a-41738ddfc063" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7673-af05-ad8520f6c3e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_019cfbf6-4a63-7ea9-8ea0-74143e6b77e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7673-af05-ad8520f6c3e5" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_019cfbf6-4a63-7ea9-8ea0-74143e6b77e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CollateralizedMortgageObligationsIssuedByUSGovernmentSponsoredEnterprisesMember_019cfbf6-4a63-7939-a0c8-8097edab7013" xlink:href="bbt-20260331.xsd#bbt_CollateralizedMortgageObligationsIssuedByUSGovernmentSponsoredEnterprisesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7673-af05-ad8520f6c3e5" xlink:to="loc_bbt_CollateralizedMortgageObligationsIssuedByUSGovernmentSponsoredEnterprisesMember_019cfbf6-4a63-7939-a0c8-8097edab7013" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_019cfbf6-4a63-7451-9ac1-610865cd4f06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7673-af05-ad8520f6c3e5" xlink:to="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_019cfbf6-4a63-7451-9ac1-610865cd4f06" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_019cfbf6-4a63-7e5b-be88-8d8c06c1a593" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7673-af05-ad8520f6c3e5" xlink:to="loc_us-gaap_MunicipalBondsMember_019cfbf6-4a63-7e5b-be88-8d8c06c1a593" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-4a63-7bf5-ad12-5692c72be9b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7673-af05-ad8520f6c3e5" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-4a63-7bf5-ad12-5692c72be9b5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_019cfbf6-4a63-7041-870c-20688ff52296" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7673-af05-ad8520f6c3e5" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_019cfbf6-4a63-7041-870c-20688ff52296" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019cfbf6-4a63-7ae8-b931-77c2fa65ea31" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7673-af05-ad8520f6c3e5" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_019cfbf6-4a63-7ae8-b931-77c2fa65ea31" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7cf3-b7bb-c26b3dddd399" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cfbf6-4a63-7392-a779-44833838fc24" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7cf3-b7bb-c26b3dddd399" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7cf3-b7bb-c26b3dddd399_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7cf3-b7bb-c26b3dddd399" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7cf3-b7bb-c26b3dddd399_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7b8d-8abc-b77621095da7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7cf3-b7bb-c26b3dddd399" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7b8d-8abc-b77621095da7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_019cfbf6-4a63-7243-a7ed-3b6348d2ffc6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7b8d-8abc-b77621095da7" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_019cfbf6-4a63-7243-a7ed-3b6348d2ffc6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-7b58-beab-cb78a8d8eff1" 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_019cfbf6-4a63-7392-a779-44833838fc24" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-7b58-beab-cb78a8d8eff1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7b58-beab-cb78a8d8eff1_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_019cfbf6-4a63-7b58-beab-cb78a8d8eff1" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7b58-beab-cb78a8d8eff1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-73be-b266-67704903d391" 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_019cfbf6-4a63-7b58-beab-cb78a8d8eff1" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-73be-b266-67704903d391" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019cfbf6-4a63-7b49-97e1-f1d476b68dee" 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_019cfbf6-4a63-73be-b266-67704903d391" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019cfbf6-4a63-7b49-97e1-f1d476b68dee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019cfbf6-4a63-7149-8a98-3e2088ed4bc3" 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_019cfbf6-4a63-73be-b266-67704903d391" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019cfbf6-4a63-7149-8a98-3e2088ed4bc3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-7e1a-9a5b-9d8646ead265" 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_019cfbf6-4a63-73be-b266-67704903d391" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-7e1a-9a5b-9d8646ead265" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019daccb-cb5c-7caf-9a1c-d55301b3f26d" 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_019cfbf6-4a63-7392-a779-44833838fc24" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019daccb-cb5c-7caf-9a1c-d55301b3f26d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019daccb-cb5c-7caf-9a1c-d55301b3f26d_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_019daccb-cb5c-7caf-9a1c-d55301b3f26d" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019daccb-cb5c-7caf-9a1c-d55301b3f26d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019daccb-cb5c-7291-a511-f0e36c54fed1" 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_019daccb-cb5c-7caf-9a1c-d55301b3f26d" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019daccb-cb5c-7291-a511-f0e36c54fed1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019cfbf6-4a63-7afa-a2bf-55e19ba5c89e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019daccb-cb5c-7291-a511-f0e36c54fed1" xlink:to="loc_us-gaap_InterestRateContractMember_019cfbf6-4a63-7afa-a2bf-55e19ba5c89e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanLevelDerivativeMember_019cfbf6-4a63-7e3f-b9f9-8415fb55258a" xlink:href="bbt-20260331.xsd#bbt_LoanLevelDerivativeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019daccb-cb5c-7291-a511-f0e36c54fed1" xlink:to="loc_bbt_LoanLevelDerivativeMember_019cfbf6-4a63-7e3f-b9f9-8415fb55258a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_RiskParticipationoutAgreementMember_019cfbf6-4a63-7c46-892b-e80a244fcae3" xlink:href="bbt-20260331.xsd#bbt_RiskParticipationoutAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019daccb-cb5c-7291-a511-f0e36c54fed1" xlink:to="loc_bbt_RiskParticipationoutAgreementMember_019cfbf6-4a63-7c46-892b-e80a244fcae3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019cfbf6-4a63-72ff-a653-2966cb4d8443" 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_019daccb-cb5c-7291-a511-f0e36c54fed1" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019cfbf6-4a63-72ff-a653-2966cb4d8443" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_RiskParticipationinAgreementMember_019cfbf6-4a63-711c-9a88-fe9b3c67d681" xlink:href="bbt-20260331.xsd#bbt_RiskParticipationinAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019daccb-cb5c-7291-a511-f0e36c54fed1" xlink:to="loc_bbt_RiskParticipationinAgreementMember_019cfbf6-4a63-711c-9a88-fe9b3c67d681" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cfbf6-4a63-7a97-8223-47d3bb756dcf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cfbf6-4a63-7e06-83ff-f1b8363cc5a0" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cfbf6-4a63-7a97-8223-47d3bb756dcf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cfbf6-4a63-772b-86c4-e656c9ab69c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cfbf6-4a63-7a97-8223-47d3bb756dcf" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cfbf6-4a63-772b-86c4-e656c9ab69c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cfbf6-4a63-7077-a009-54417c3e6f5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_019cfbf6-4a63-7a97-8223-47d3bb756dcf" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cfbf6-4a63-7077-a009-54417c3e6f5a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019cfbf6-4a63-7b8e-9d18-7f95e4f453d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cfbf6-4a63-7e06-83ff-f1b8363cc5a0" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019cfbf6-4a63-7b8e-9d18-7f95e4f453d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cfbf6-4a63-7b9b-923f-f0ffe0ebf2c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_019cfbf6-4a63-7b8e-9d18-7f95e4f453d2" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cfbf6-4a63-7b9b-923f-f0ffe0ebf2c8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofQuantitativeInformationAboutSignificantUnobservableInputsLevel3forAssetsMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#FairValueofFinancialInstrumentsScheduleofQuantitativeInformationAboutSignificantUnobservableInputsLevel3forAssetsMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofQuantitativeInformationAboutSignificantUnobservableInputsLevel3forAssetsMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cfbf6-4a63-7891-ac04-88e46541798d" 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_019cfbf6-4a63-7a6a-8c6d-f55ca50394ac" 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_019cfbf6-4a63-7891-ac04-88e46541798d" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7a6a-8c6d-f55ca50394ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-7c3b-9dc1-03317fa0ccb3" 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7a6a-8c6d-f55ca50394ac" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-7c3b-9dc1-03317fa0ccb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7c3b-9dc1-03317fa0ccb3_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_019cfbf6-4a63-7c3b-9dc1-03317fa0ccb3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7c3b-9dc1-03317fa0ccb3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7a15-bd1d-0c68dcc306da" 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_019cfbf6-4a63-7c3b-9dc1-03317fa0ccb3" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7a15-bd1d-0c68dcc306da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-7434-a4c8-e31d47f82b71" 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_019cfbf6-4a63-7a15-bd1d-0c68dcc306da" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-7434-a4c8-e31d47f82b71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cfbf6-4a63-747a-914b-9dc74fa5e945" 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7a6a-8c6d-f55ca50394ac" xlink:to="loc_srt_RangeAxis_019cfbf6-4a63-747a-914b-9dc74fa5e945" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cfbf6-4a63-747a-914b-9dc74fa5e945_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_019cfbf6-4a63-747a-914b-9dc74fa5e945" xlink:to="loc_srt_RangeMember_019cfbf6-4a63-747a-914b-9dc74fa5e945_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cfbf6-4a63-713b-8726-0dd1c22042e3" 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_019cfbf6-4a63-747a-914b-9dc74fa5e945" xlink:to="loc_srt_RangeMember_019cfbf6-4a63-713b-8726-0dd1c22042e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cfbf6-4a63-77a6-87aa-ac7abb7a80ad" 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_019cfbf6-4a63-713b-8726-0dd1c22042e3" xlink:to="loc_srt_MinimumMember_019cfbf6-4a63-77a6-87aa-ac7abb7a80ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cfbf6-4a63-755b-a5d3-2fa46f9d32b4" 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_019cfbf6-4a63-713b-8726-0dd1c22042e3" xlink:to="loc_srt_MaximumMember_019cfbf6-4a63-755b-a5d3-2fa46f9d32b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_019cfbf6-4a63-7405-bc7e-9a8c09cdac68" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cfbf6-4a63-713b-8726-0dd1c22042e3" xlink:to="loc_srt_WeightedAverageMember_019cfbf6-4a63-7405-bc7e-9a8c09cdac68" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_019cfbf6-4a63-79ac-b32b-82adc2f009fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7a6a-8c6d-f55ca50394ac" xlink:to="loc_us-gaap_ValuationTechniqueAxis_019cfbf6-4a63-79ac-b32b-82adc2f009fe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-79ac-b32b-82adc2f009fe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019cfbf6-4a63-79ac-b32b-82adc2f009fe" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-79ac-b32b-82adc2f009fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-7552-8076-35aea221c9a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019cfbf6-4a63-79ac-b32b-82adc2f009fe" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-7552-8076-35aea221c9a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019cfbf6-4a63-7f90-b8cd-3f54293d1a21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-7552-8076-35aea221c9a3" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019cfbf6-4a63-7f90-b8cd-3f54293d1a21" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketApproachValuationTechniqueMember_019cfbf6-4a63-72b2-bb2b-37045a1dde68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketApproachValuationTechniqueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-7552-8076-35aea221c9a3" xlink:to="loc_us-gaap_MarketApproachValuationTechniqueMember_019cfbf6-4a63-72b2-bb2b-37045a1dde68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019cfbf6-4a63-7163-9a11-22de0c2f4c69" 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_019cfbf6-4a63-7a6a-8c6d-f55ca50394ac" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019cfbf6-4a63-7163-9a11-22de0c2f4c69" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019cfbf6-4a63-7163-9a11-22de0c2f4c69_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_019cfbf6-4a63-7163-9a11-22de0c2f4c69" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019cfbf6-4a63-7163-9a11-22de0c2f4c69_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019cfbf6-4a63-773c-b7f7-196ca3a304d1" 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_019cfbf6-4a63-7163-9a11-22de0c2f4c69" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019cfbf6-4a63-773c-b7f7-196ca3a304d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_019cfbf6-4a63-74ab-8b61-572a88100a0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019cfbf6-4a63-773c-b7f7-196ca3a304d1" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_019cfbf6-4a63-74ab-8b61-572a88100a0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-7a7c-80fb-ac3e5959b6c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7a6a-8c6d-f55ca50394ac" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-7a7c-80fb-ac3e5959b6c4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7a7c-80fb-ac3e5959b6c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-7a7c-80fb-ac3e5959b6c4" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7a7c-80fb-ac3e5959b6c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7df6-87fe-2b4feb079838" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-7a7c-80fb-ac3e5959b6c4" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7df6-87fe-2b4feb079838" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_019cfbf6-4a63-7702-9f7a-f9dfb2bd77c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7df6-87fe-2b4feb079838" xlink:to="loc_us-gaap_MunicipalBondsMember_019cfbf6-4a63-7702-9f7a-f9dfb2bd77c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-4a63-7e7f-aec1-6935a7cd1979" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-7df6-87fe-2b4feb079838" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-4a63-7e7f-aec1-6935a7cd1979" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cfbf6-4a63-7a1b-898d-8e96edb1bc01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cfbf6-4a63-7891-ac04-88e46541798d" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_019cfbf6-4a63-7a1b-898d-8e96edb1bc01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput_019cfbf6-4a63-7c33-9756-370699167875" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cfbf6-4a63-7891-ac04-88e46541798d" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput_019cfbf6-4a63-7c33-9756-370699167875" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofFairValueAssetsMeasuredonRecurringBasisUnobservableInputReconciliationDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#FairValueofFinancialInstrumentsScheduleofFairValueAssetsMeasuredonRecurringBasisUnobservableInputReconciliationDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofFairValueAssetsMeasuredonRecurringBasisUnobservableInputReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cfbf6-4a63-7b25-ba6e-5118bddb5cf9" 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_019cfbf6-4a63-7393-b4ac-a65ff6376a3d" 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_019cfbf6-4a63-7b25-ba6e-5118bddb5cf9" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cfbf6-4a63-7393-b4ac-a65ff6376a3d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_019cfbf6-4a63-70d9-8d5b-ab0bb37d7553" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cfbf6-4a63-7393-b4ac-a65ff6376a3d" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_019cfbf6-4a63-70d9-8d5b-ab0bb37d7553" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019cfbf6-4a63-70d9-8d5b-ab0bb37d7553_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019cfbf6-4a63-70d9-8d5b-ab0bb37d7553" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019cfbf6-4a63-70d9-8d5b-ab0bb37d7553_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019cfbf6-4a63-7711-a783-115b806fa2aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019cfbf6-4a63-70d9-8d5b-ab0bb37d7553" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019cfbf6-4a63-7711-a783-115b806fa2aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MunicipalBondsMember_019cfbf6-4a63-79fa-8d2a-315d34827859" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MunicipalBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019cfbf6-4a63-7711-a783-115b806fa2aa" xlink:to="loc_us-gaap_MunicipalBondsMember_019cfbf6-4a63-79fa-8d2a-315d34827859" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-4a63-7e4d-b508-f47dad0c9986" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019cfbf6-4a63-7711-a783-115b806fa2aa" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cfbf6-4a63-7e4d-b508-f47dad0c9986" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cfbf6-4a63-7684-ba10-badbb9eac29e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cfbf6-4a63-7b25-ba6e-5118bddb5cf9" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cfbf6-4a63-7684-ba10-badbb9eac29e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019cfbf6-4a63-7762-b2af-89cca49ef2f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cfbf6-4a63-7684-ba10-badbb9eac29e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019cfbf6-4a63-7762-b2af-89cca49ef2f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_019cfbf6-4a63-7b93-8fa8-8fc3ecd07627" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cfbf6-4a63-7684-ba10-badbb9eac29e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_019cfbf6-4a63-7b93-8fa8-8fc3ecd07627" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_019cfbf6-4a63-7230-bc2d-20604e6d322f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cfbf6-4a63-7684-ba10-badbb9eac29e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_019cfbf6-4a63-7230-bc2d-20604e6d322f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_019cfbf6-4a63-7412-9da1-03d33d5932bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cfbf6-4a63-7684-ba10-badbb9eac29e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3_019cfbf6-4a63-7412-9da1-03d33d5932bc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_019cfbf6-4a63-7d97-b75b-cdfd17752776" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cfbf6-4a63-7684-ba10-badbb9eac29e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3_019cfbf6-4a63-7d97-b75b-cdfd17752776" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_019cfbf6-4a63-7330-8187-c0694d823371" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cfbf6-4a63-7684-ba10-badbb9eac29e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_019cfbf6-4a63-7330-8187-c0694d823371" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_019cfbf6-4a63-770b-8863-fb7ce05b72f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_019cfbf6-4a63-7684-ba10-badbb9eac29e" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_019cfbf6-4a63-770b-8863-fb7ce05b72f0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_019cfbf6-4a63-70dd-b6ff-b22094e8441b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringandNonRecurringBasisDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#FairValueofFinancialInstrumentsScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringandNonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofAssetsandLiabilitiesMeasuredatFairValueonaRecurringandNonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cfbf6-4a63-74d3-b2c2-a9483528360c" 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_019cfbf6-4a63-7b06-800f-caf43bfade4b" 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_019cfbf6-4a63-74d3-b2c2-a9483528360c" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cfbf6-4a63-7b06-800f-caf43bfade4b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-767e-9248-c09a52b61f27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cfbf6-4a63-7b06-800f-caf43bfade4b" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-767e-9248-c09a52b61f27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-767e-9248-c09a52b61f27_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-767e-9248-c09a52b61f27" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-767e-9248-c09a52b61f27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-742f-b043-861f5bebf088" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-767e-9248-c09a52b61f27" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-742f-b043-861f5bebf088" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CollateralDependentImpairedLoansMember_019cfbf6-4a63-7e97-926f-572712198caa" xlink:href="bbt-20260331.xsd#bbt_CollateralDependentImpairedLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-742f-b043-861f5bebf088" xlink:to="loc_bbt_CollateralDependentImpairedLoansMember_019cfbf6-4a63-7e97-926f-572712198caa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_RepossessedVehiclesAndEquipmentMember_019cfbf6-4a63-7e26-b929-51236f69b3fe" xlink:href="bbt-20260331.xsd#bbt_RepossessedVehiclesAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-742f-b043-861f5bebf088" xlink:to="loc_bbt_RepossessedVehiclesAndEquipmentMember_019cfbf6-4a63-7e26-b929-51236f69b3fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7696-beae-6168d896c8e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cfbf6-4a63-7b06-800f-caf43bfade4b" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7696-beae-6168d896c8e7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7696-beae-6168d896c8e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7696-beae-6168d896c8e7" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7696-beae-6168d896c8e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7487-918b-fc72d15e377f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7696-beae-6168d896c8e7" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7487-918b-fc72d15e377f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsNonrecurringMember_019cfbf6-4a63-7683-a5f0-4f28ffd9f2fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsNonrecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7487-918b-fc72d15e377f" xlink:to="loc_us-gaap_FairValueMeasurementsNonrecurringMember_019cfbf6-4a63-7683-a5f0-4f28ffd9f2fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-7e40-930b-e58b99a99ff2" 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_019cfbf6-4a63-7b06-800f-caf43bfade4b" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-7e40-930b-e58b99a99ff2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7e40-930b-e58b99a99ff2_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_019cfbf6-4a63-7e40-930b-e58b99a99ff2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7e40-930b-e58b99a99ff2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7d38-a7e3-91187b5cdbd2" 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_019cfbf6-4a63-7e40-930b-e58b99a99ff2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7d38-a7e3-91187b5cdbd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019cfbf6-4a63-7ec2-a27e-9c112bd1daee" 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_019cfbf6-4a63-7d38-a7e3-91187b5cdbd2" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019cfbf6-4a63-7ec2-a27e-9c112bd1daee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019cfbf6-4a63-7c39-a35b-daacd5355207" 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_019cfbf6-4a63-7d38-a7e3-91187b5cdbd2" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019cfbf6-4a63-7c39-a35b-daacd5355207" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-7566-9f60-8c4cc4d02189" 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_019cfbf6-4a63-7d38-a7e3-91187b5cdbd2" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-7566-9f60-8c4cc4d02189" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019cfbf6-4a63-7198-bc82-0122ebc44da8" 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cfbf6-4a63-74d3-b2c2-a9483528360c" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019cfbf6-4a63-7198-bc82-0122ebc44da8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofQuantitativeInformationforLevel3AssetsMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#FairValueofFinancialInstrumentsScheduleofQuantitativeInformationforLevel3AssetsMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleofQuantitativeInformationforLevel3AssetsMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cfbf6-4a63-7b1d-b542-33a21941127b" 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_019cfbf6-4a63-7c33-abd6-a512af67cd35" 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_019cfbf6-4a63-7b1d-b542-33a21941127b" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7c33-abd6-a512af67cd35" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-71fb-bb6d-0678067aa1ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7c33-abd6-a512af67cd35" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-71fb-bb6d-0678067aa1ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-71fb-bb6d-0678067aa1ff_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-71fb-bb6d-0678067aa1ff" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-71fb-bb6d-0678067aa1ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-74c4-b3d9-d8274d986c79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cfbf6-4a63-71fb-bb6d-0678067aa1ff" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-74c4-b3d9-d8274d986c79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_ImpairedLoansMember_019cfbf6-4a63-7e58-b3fb-b785b8d728ad" xlink:href="bbt-20260331.xsd#bbt_ImpairedLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-74c4-b3d9-d8274d986c79" xlink:to="loc_bbt_ImpairedLoansMember_019cfbf6-4a63-7e58-b3fb-b785b8d728ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_OtherRealEstateOwnedMember_019cfbf6-4a63-7011-aa85-67d51bc79acb" xlink:href="bbt-20260331.xsd#bbt_OtherRealEstateOwnedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cfbf6-4a63-74c4-b3d9-d8274d986c79" xlink:to="loc_bbt_OtherRealEstateOwnedMember_019cfbf6-4a63-7011-aa85-67d51bc79acb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-73c6-b515-52213fe4251b" 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7c33-abd6-a512af67cd35" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-73c6-b515-52213fe4251b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-73c6-b515-52213fe4251b_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_019cfbf6-4a63-73c6-b515-52213fe4251b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-73c6-b515-52213fe4251b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-75f7-892b-c5efc97a5f55" 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_019cfbf6-4a63-73c6-b515-52213fe4251b" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-75f7-892b-c5efc97a5f55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-744a-b1c3-f7297dc02755" 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_019cfbf6-4a63-75f7-892b-c5efc97a5f55" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-744a-b1c3-f7297dc02755" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7a40-9026-638366c9be15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7c33-abd6-a512af67cd35" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7a40-9026-638366c9be15" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7a40-9026-638366c9be15_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7a40-9026-638366c9be15" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-7a40-9026-638366c9be15_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-74ed-b897-39948bd86674" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cfbf6-4a63-7a40-9026-638366c9be15" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-74ed-b897-39948bd86674" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_019cfbf6-4a63-7f58-8427-f351569a424d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cfbf6-4a63-74ed-b897-39948bd86674" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_019cfbf6-4a63-7f58-8427-f351569a424d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_019cfbf6-4a63-7071-95bb-4e6feb1977fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7c33-abd6-a512af67cd35" xlink:to="loc_us-gaap_ValuationTechniqueAxis_019cfbf6-4a63-7071-95bb-4e6feb1977fd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-7071-95bb-4e6feb1977fd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019cfbf6-4a63-7071-95bb-4e6feb1977fd" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-7071-95bb-4e6feb1977fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-7fdc-b99b-6efd687ff5ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019cfbf6-4a63-7071-95bb-4e6feb1977fd" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-7fdc-b99b-6efd687ff5ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketApproachValuationTechniqueMember_019cfbf6-4a63-7977-a4e4-ea472b316ded" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketApproachValuationTechniqueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019cfbf6-4a63-7fdc-b99b-6efd687ff5ae" xlink:to="loc_us-gaap_MarketApproachValuationTechniqueMember_019cfbf6-4a63-7977-a4e4-ea472b316ded" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_DiscountforCoststoSellMember_019cfbf6-4a63-7cdd-a18c-643211d295c5" xlink:href="bbt-20260331.xsd#bbt_DiscountforCoststoSellMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketApproachValuationTechniqueMember_019cfbf6-4a63-7977-a4e4-ea472b316ded" xlink:to="loc_bbt_DiscountforCoststoSellMember_019cfbf6-4a63-7cdd-a18c-643211d295c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_AppraisalAdjustmentsMember_019cfbf6-4a63-7ed3-8d59-6d1707787d21" xlink:href="bbt-20260331.xsd#bbt_AppraisalAdjustmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketApproachValuationTechniqueMember_019cfbf6-4a63-7977-a4e4-ea472b316ded" xlink:to="loc_bbt_AppraisalAdjustmentsMember_019cfbf6-4a63-7ed3-8d59-6d1707787d21" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cfbf6-4a63-7eeb-8b05-d26d55aa95d9" 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cfbf6-4a63-7c33-abd6-a512af67cd35" xlink:to="loc_srt_RangeAxis_019cfbf6-4a63-7eeb-8b05-d26d55aa95d9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cfbf6-4a63-7eeb-8b05-d26d55aa95d9_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_019cfbf6-4a63-7eeb-8b05-d26d55aa95d9" xlink:to="loc_srt_RangeMember_019cfbf6-4a63-7eeb-8b05-d26d55aa95d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cfbf6-4a63-7b51-8295-7a848876f8a1" 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_019cfbf6-4a63-7eeb-8b05-d26d55aa95d9" xlink:to="loc_srt_RangeMember_019cfbf6-4a63-7b51-8295-7a848876f8a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cfbf6-4a63-7702-bd0d-76b38b034ae8" 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_019cfbf6-4a63-7b51-8295-7a848876f8a1" xlink:to="loc_srt_MinimumMember_019cfbf6-4a63-7702-bd0d-76b38b034ae8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cfbf6-4a63-7d3d-8206-22334be4f8db" 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_019cfbf6-4a63-7b51-8295-7a848876f8a1" xlink:to="loc_srt_MaximumMember_019cfbf6-4a63-7d3d-8206-22334be4f8db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019cfbf6-4a63-723e-b23c-7a3c1b6abc66" 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cfbf6-4a63-7b1d-b542-33a21941127b" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019cfbf6-4a63-723e-b23c-7a3c1b6abc66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_FairValueInputsBasisSpread_019cfbf6-4a63-7e2b-89c4-6a2d30ce75e0" xlink:href="bbt-20260331.xsd#bbt_FairValueInputsBasisSpread"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cfbf6-4a63-7b1d-b542-33a21941127b" xlink:to="loc_bbt_FairValueInputsBasisSpread_019cfbf6-4a63-7e2b-89c4-6a2d30ce75e0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleoftheCarryingValuesandEstimatedFairValuesDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#FairValueofFinancialInstrumentsScheduleoftheCarryingValuesandEstimatedFairValuesDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/FairValueofFinancialInstrumentsScheduleoftheCarryingValuesandEstimatedFairValuesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cfbf6-4a63-79f5-8870-89ceb71b839e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019cfbf6-4a63-7a01-984a-e90e7993fcd2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cfbf6-4a63-79f5-8870-89ceb71b839e" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019cfbf6-4a63-7a01-984a-e90e7993fcd2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019cfbf6-4a63-792a-a8cc-7c0a8fb62461" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019cfbf6-4a63-7a01-984a-e90e7993fcd2" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019cfbf6-4a63-792a-a8cc-7c0a8fb62461" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cfbf6-4a63-792a-a8cc-7c0a8fb62461_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cfbf6-4a63-792a-a8cc-7c0a8fb62461" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cfbf6-4a63-792a-a8cc-7c0a8fb62461_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cfbf6-4a63-7d6e-9fdb-9bb7bbba4446" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cfbf6-4a63-792a-a8cc-7c0a8fb62461" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cfbf6-4a63-7d6e-9fdb-9bb7bbba4446" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cfbf6-4a63-7476-8dfc-6f76d2fbe3a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cfbf6-4a63-7d6e-9fdb-9bb7bbba4446" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cfbf6-4a63-7476-8dfc-6f76d2fbe3a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cfbf6-4a63-7d45-b403-46e9ffa21a86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cfbf6-4a63-7476-8dfc-6f76d2fbe3a5" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cfbf6-4a63-7d45-b403-46e9ffa21a86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019cfbf6-4a63-70e7-986b-6408a4ad9d55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cfbf6-4a63-7476-8dfc-6f76d2fbe3a5" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019cfbf6-4a63-70e7-986b-6408a4ad9d55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-7583-b462-8ba9fc7833ed" 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_FairValueByBalanceSheetGroupingTable_019cfbf6-4a63-7a01-984a-e90e7993fcd2" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cfbf6-4a63-7583-b462-8ba9fc7833ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7583-b462-8ba9fc7833ed_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_019cfbf6-4a63-7583-b462-8ba9fc7833ed" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7583-b462-8ba9fc7833ed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7433-93c6-e1f367f31ff6" 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_019cfbf6-4a63-7583-b462-8ba9fc7833ed" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cfbf6-4a63-7433-93c6-e1f367f31ff6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019cfbf6-4a63-7d4a-bfb0-bdfebe46d488" 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_019cfbf6-4a63-7433-93c6-e1f367f31ff6" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019cfbf6-4a63-7d4a-bfb0-bdfebe46d488" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019cfbf6-4a63-74d7-8d8f-54f5f8696cd5" 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_019cfbf6-4a63-7433-93c6-e1f367f31ff6" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019cfbf6-4a63-74d7-8d8f-54f5f8696cd5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-7f0a-bcbc-82f789d96aca" 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_019cfbf6-4a63-7433-93c6-e1f367f31ff6" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cfbf6-4a63-7f0a-bcbc-82f789d96aca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_019cfbf6-4a63-72b9-8e84-c4639d6c84be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cfbf6-4a63-79f5-8870-89ceb71b839e" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_019cfbf6-4a63-72b9-8e84-c4639d6c84be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019cfbf6-4a63-7872-a059-954f0bd4f555" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_019cfbf6-4a63-72b9-8e84-c4639d6c84be" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019cfbf6-4a63-7872-a059-954f0bd4f555" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_019cfbf6-4a63-76bc-9020-efa266b69387" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cfbf6-4a63-79f5-8870-89ceb71b839e" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_019cfbf6-4a63-76bc-9020-efa266b69387" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimeDeposits_019cfbf6-4a63-79ac-93b1-0757d17f9a89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TimeDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_019cfbf6-4a63-76bc-9020-efa266b69387" xlink:to="loc_us-gaap_TimeDeposits_019cfbf6-4a63-79ac-93b1-0757d17f9a89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherBorrowings_019cfbf6-4a63-700e-87fb-352f2b55ef6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_019cfbf6-4a63-76bc-9020-efa266b69387" xlink:to="loc_us-gaap_OtherBorrowings_019cfbf6-4a63-700e-87fb-352f2b55ef6e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/CommitmentsandContingenciesScheduleofFinancialInstrumentswithOffBalanceSheetRiskDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#CommitmentsandContingenciesScheduleofFinancialInstrumentswithOffBalanceSheetRiskDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/CommitmentsandContingenciesScheduleofFinancialInstrumentswithOffBalanceSheetRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanCommitmentsLineItems_019cfbf6-4a63-7ce1-b747-bbf220f74c45" xlink:href="bbt-20260331.xsd#bbt_LoanCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_ScheduleOfLoanCommitmentsTable_019cfbf6-4a63-78f2-bbb8-c0a4cbe2ee19" xlink:href="bbt-20260331.xsd#bbt_ScheduleOfLoanCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_bbt_LoanCommitmentsLineItems_019cfbf6-4a63-7ce1-b747-bbf220f74c45" xlink:to="loc_bbt_ScheduleOfLoanCommitmentsTable_019cfbf6-4a63-78f2-bbb8-c0a4cbe2ee19" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanCommitmentsByNatureOfCommitmentsAxis_019cfbf6-4a63-7102-9b4a-7789d6352c01" xlink:href="bbt-20260331.xsd#bbt_LoanCommitmentsByNatureOfCommitmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_bbt_ScheduleOfLoanCommitmentsTable_019cfbf6-4a63-78f2-bbb8-c0a4cbe2ee19" xlink:to="loc_bbt_LoanCommitmentsByNatureOfCommitmentsAxis_019cfbf6-4a63-7102-9b4a-7789d6352c01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanCommitmentsNatureDomain_019cfbf6-4a63-7102-9b4a-7789d6352c01_default" xlink:href="bbt-20260331.xsd#bbt_LoanCommitmentsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_bbt_LoanCommitmentsByNatureOfCommitmentsAxis_019cfbf6-4a63-7102-9b4a-7789d6352c01" xlink:to="loc_bbt_LoanCommitmentsNatureDomain_019cfbf6-4a63-7102-9b4a-7789d6352c01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanCommitmentsNatureDomain_019cfbf6-4a63-75d0-b39b-d25187460792" xlink:href="bbt-20260331.xsd#bbt_LoanCommitmentsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_bbt_LoanCommitmentsByNatureOfCommitmentsAxis_019cfbf6-4a63-7102-9b4a-7789d6352c01" xlink:to="loc_bbt_LoanCommitmentsNatureDomain_019cfbf6-4a63-75d0-b39b-d25187460792" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialRealEstateMember_019cfbf6-4a63-707d-95a1-5032a42bb426" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialRealEstateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanCommitmentsNatureDomain_019cfbf6-4a63-75d0-b39b-d25187460792" xlink:to="loc_us-gaap_CommercialRealEstateMember_019cfbf6-4a63-707d-95a1-5032a42bb426" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialLoanMember_019cfbf6-4a63-7f20-860f-797f5025bea2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanCommitmentsNatureDomain_019cfbf6-4a63-75d0-b39b-d25187460792" xlink:to="loc_us-gaap_CommercialLoanMember_019cfbf6-4a63-7f20-860f-797f5025bea2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageMember_019cfbf6-4a63-787e-bdd6-273d69fcf9e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResidentialMortgageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanCommitmentsNatureDomain_019cfbf6-4a63-75d0-b39b-d25187460792" xlink:to="loc_us-gaap_ResidentialMortgageMember_019cfbf6-4a63-787e-bdd6-273d69fcf9e3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HomeEquityLoanMember_019cfbf6-4a63-7cd9-8fb4-9cccc607fd41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HomeEquityLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanCommitmentsNatureDomain_019cfbf6-4a63-75d0-b39b-d25187460792" xlink:to="loc_us-gaap_HomeEquityLoanMember_019cfbf6-4a63-7cd9-8fb4-9cccc607fd41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cfbf6-4a63-78e5-9cd7-cac9ad22a28b" 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_bbt_ScheduleOfLoanCommitmentsTable_019cfbf6-4a63-78f2-bbb8-c0a4cbe2ee19" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cfbf6-4a63-78e5-9cd7-cac9ad22a28b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-78e5-9cd7-cac9ad22a28b_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_019cfbf6-4a63-78e5-9cd7-cac9ad22a28b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-78e5-9cd7-cac9ad22a28b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7d5a-ada5-ef405c5f29e0" 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_019cfbf6-4a63-78e5-9cd7-cac9ad22a28b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7d5a-ada5-ef405c5f29e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019cfbf6-4a63-717b-9f9a-e291a740c463" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7d5a-ada5-ef405c5f29e0" xlink:to="loc_us-gaap_InterestRateContractMember_019cfbf6-4a63-717b-9f9a-e291a740c463" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanLevelDerivativeReceiveFixedPayVariableMember_019cfbf6-4a63-7964-ac56-6e3eb0e1a3ef" xlink:href="bbt-20260331.xsd#bbt_LoanLevelDerivativeReceiveFixedPayVariableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7d5a-ada5-ef405c5f29e0" xlink:to="loc_bbt_LoanLevelDerivativeReceiveFixedPayVariableMember_019cfbf6-4a63-7964-ac56-6e3eb0e1a3ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LoanLevelDerivativePayFixedReceiveVariableMember_019cfbf6-4a63-7623-a835-973aeb47a86b" xlink:href="bbt-20260331.xsd#bbt_LoanLevelDerivativePayFixedReceiveVariableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7d5a-ada5-ef405c5f29e0" xlink:to="loc_bbt_LoanLevelDerivativePayFixedReceiveVariableMember_019cfbf6-4a63-7623-a835-973aeb47a86b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_RiskParticipationoutAgreementMember_019cfbf6-4a63-770d-99a3-940c43e87078" xlink:href="bbt-20260331.xsd#bbt_RiskParticipationoutAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7d5a-ada5-ef405c5f29e0" xlink:to="loc_bbt_RiskParticipationoutAgreementMember_019cfbf6-4a63-770d-99a3-940c43e87078" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_RiskParticipationinAgreementMember_019cfbf6-4a63-7bf3-966a-da5484a9299f" xlink:href="bbt-20260331.xsd#bbt_RiskParticipationinAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cfbf6-4a63-7d5a-ada5-ef405c5f29e0" xlink:to="loc_bbt_RiskParticipationinAgreementMember_019cfbf6-4a63-7bf3-966a-da5484a9299f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019cfbf6-4a63-78c8-b4d6-4e6b902281a8" 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_019cfbf6-4a63-7d5a-ada5-ef405c5f29e0" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019cfbf6-4a63-78c8-b4d6-4e6b902281a8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionAxis_019cfbf6-4a63-789b-bee6-a135ae716517" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_bbt_ScheduleOfLoanCommitmentsTable_019cfbf6-4a63-78f2-bbb8-c0a4cbe2ee19" xlink:to="loc_us-gaap_PositionAxis_019cfbf6-4a63-789b-bee6-a135ae716517" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019cfbf6-4a63-789b-bee6-a135ae716517_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PositionAxis_019cfbf6-4a63-789b-bee6-a135ae716517" xlink:to="loc_us-gaap_PositionDomain_019cfbf6-4a63-789b-bee6-a135ae716517_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019cfbf6-4a63-7f04-a00d-65f1638cd3f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PositionAxis_019cfbf6-4a63-789b-bee6-a135ae716517" xlink:to="loc_us-gaap_PositionDomain_019cfbf6-4a63-7f04-a00d-65f1638cd3f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongMember_019cfbf6-4a63-7ad0-b845-beaf2fca2da5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019cfbf6-4a63-7f04-a00d-65f1638cd3f6" xlink:to="loc_us-gaap_LongMember_019cfbf6-4a63-7ad0-b845-beaf2fca2da5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortMember_019cfbf6-4a63-732f-9d02-e6e7963e8ad7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019cfbf6-4a63-7f04-a00d-65f1638cd3f6" xlink:to="loc_us-gaap_ShortMember_019cfbf6-4a63-732f-9d02-e6e7963e8ad7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommitmentsToOriginateLoansAndLeases_019cfbf6-4a63-7f10-a7cb-222663e3f9f1" xlink:href="bbt-20260331.xsd#bbt_CommitmentsToOriginateLoansAndLeases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanCommitmentsLineItems_019cfbf6-4a63-7ce1-b747-bbf220f74c45" xlink:to="loc_bbt_CommitmentsToOriginateLoansAndLeases_019cfbf6-4a63-7f10-a7cb-222663e3f9f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_CommitmentsToUnadvancedPortionOfLoans_019cfbf6-4a63-7d1d-a8c3-0d62d9f7802b" xlink:href="bbt-20260331.xsd#bbt_CommitmentsToUnadvancedPortionOfLoans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanCommitmentsLineItems_019cfbf6-4a63-7ce1-b747-bbf220f74c45" xlink:to="loc_bbt_CommitmentsToUnadvancedPortionOfLoans_019cfbf6-4a63-7d1d-a8c3-0d62d9f7802b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7424-9cae-8f280bdf2c6e" xlink:href="bbt-20260331.xsd#bbt_LineOfCreditFacilityRemainingBorrowingCapacityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanCommitmentsLineItems_019cfbf6-4a63-7ce1-b747-bbf220f74c45" xlink:to="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7424-9cae-8f280bdf2c6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityForEquity_019cfbf6-4a63-70db-b526-6fca7043a71f" xlink:href="bbt-20260331.xsd#bbt_LineOfCreditFacilityRemainingBorrowingCapacityForEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7424-9cae-8f280bdf2c6e" xlink:to="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityForEquity_019cfbf6-4a63-70db-b526-6fca7043a71f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityForOther_019cfbf6-4a63-7017-9415-fe1e86ef7194" xlink:href="bbt-20260331.xsd#bbt_LineOfCreditFacilityRemainingBorrowingCapacityForOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7424-9cae-8f280bdf2c6e" xlink:to="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityForOther_019cfbf6-4a63-7017-9415-fe1e86ef7194" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityForOtherCommercial_019cfbf6-4a63-7df5-b194-fc6bd6a332e4" xlink:href="bbt-20260331.xsd#bbt_LineOfCreditFacilityRemainingBorrowingCapacityForOtherCommercial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7424-9cae-8f280bdf2c6e" xlink:to="loc_bbt_LineOfCreditFacilityRemainingBorrowingCapacityForOtherCommercial_019cfbf6-4a63-7df5-b194-fc6bd6a332e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7cb3-bb46-4ad69680f65f" xlink:href="bbt-20260331.xsd#bbt_LetterOfCreditFacilityRemainingBorrowingCapacityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LoanCommitmentsLineItems_019cfbf6-4a63-7ce1-b747-bbf220f74c45" xlink:to="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7cb3-bb46-4ad69680f65f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityForFinancialStandbyLettersOfCredit_019cfbf6-4a63-7228-8645-cbdcfaae9625" xlink:href="bbt-20260331.xsd#bbt_LetterOfCreditFacilityRemainingBorrowingCapacityForFinancialStandbyLettersOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7cb3-bb46-4ad69680f65f" xlink:to="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityForFinancialStandbyLettersOfCredit_019cfbf6-4a63-7228-8645-cbdcfaae9625" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityForPerformanceStandbyLettersOfCredit_019cfbf6-4a63-7569-9a52-0006e76cacd1" xlink:href="bbt-20260331.xsd#bbt_LetterOfCreditFacilityRemainingBorrowingCapacityForPerformanceStandbyLettersOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7cb3-bb46-4ad69680f65f" xlink:to="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityForPerformanceStandbyLettersOfCredit_019cfbf6-4a63-7569-9a52-0006e76cacd1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityForCommercialLettersOfCredit_019cfbf6-4a63-72ea-a02e-f247021330c3" xlink:href="bbt-20260331.xsd#bbt_LetterOfCreditFacilityRemainingBorrowingCapacityForCommercialLettersOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityAbstract_019cfbf6-4a63-7cb3-bb46-4ad69680f65f" xlink:to="loc_bbt_LetterOfCreditFacilityRemainingBorrowingCapacityForCommercialLettersOfCredit_019cfbf6-4a63-72ea-a02e-f247021330c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019cfbf6-4a63-78bf-9783-ea9f701a61bd" 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_bbt_LoanCommitmentsLineItems_019cfbf6-4a63-7ce1-b747-bbf220f74c45" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019cfbf6-4a63-78bf-9783-ea9f701a61bd" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.bbt.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="simple" xlink:href="bbt-20260331.xsd#CommitmentsandContingenciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.bbt.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cfbf6-4a63-70a5-905d-b7b411359824" 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_019cfbf6-4a63-7c1d-8514-664cdc9d82cf" 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_019cfbf6-4a63-70a5-905d-b7b411359824" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019cfbf6-4a63-7c1d-8514-664cdc9d82cf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cfbf6-4a63-71ae-b92f-3f79143fe3f3" 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_019cfbf6-4a63-7c1d-8514-664cdc9d82cf" xlink:to="loc_srt_RangeAxis_019cfbf6-4a63-71ae-b92f-3f79143fe3f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cfbf6-4a63-71ae-b92f-3f79143fe3f3_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_019cfbf6-4a63-71ae-b92f-3f79143fe3f3" xlink:to="loc_srt_RangeMember_019cfbf6-4a63-71ae-b92f-3f79143fe3f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cfbf6-4a63-7c92-a612-4c3dc339bc97" 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_019cfbf6-4a63-71ae-b92f-3f79143fe3f3" xlink:to="loc_srt_RangeMember_019cfbf6-4a63-7c92-a612-4c3dc339bc97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cfbf6-4a63-75b4-bd10-1401288c29b6" 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_019cfbf6-4a63-7c92-a612-4c3dc339bc97" xlink:to="loc_srt_MinimumMember_019cfbf6-4a63-75b4-bd10-1401288c29b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cfbf6-4a63-733b-87cf-af3ea822246b" 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_019cfbf6-4a63-7c92-a612-4c3dc339bc97" xlink:to="loc_srt_MaximumMember_019cfbf6-4a63-733b-87cf-af3ea822246b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019cfbf6-4a63-7a1c-8795-3a57091700b1" 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_019cfbf6-4a63-70a5-905d-b7b411359824" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019cfbf6-4a63-7a1c-8795-3a57091700b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealEstateTaxExpense_019cfbf6-4a63-7307-883c-bf500a501e79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealEstateTaxExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cfbf6-4a63-70a5-905d-b7b411359824" xlink:to="loc_us-gaap_RealEstateTaxExpense_019cfbf6-4a63-7307-883c-bf500a501e79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_019cfbf6-4a63-7432-b76d-81bb8a5bc908" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cfbf6-4a63-70a5-905d-b7b411359824" xlink:to="loc_us-gaap_LeaseCost_019cfbf6-4a63-7432-b76d-81bb8a5bc908" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_bbt_LesseeOperatingLeaseLiabilityAmount_019cfbf6-4a63-7c37-ab44-258cc2ff7a78" xlink:href="bbt-20260331.xsd#bbt_LesseeOperatingLeaseLiabilityAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019cfbf6-4a63-70a5-905d-b7b411359824" xlink:to="loc_bbt_LesseeOperatingLeaseLiabilityAmount_019cfbf6-4a63-7c37-ab44-258cc2ff7a78" xlink:type="arc" order="3"/>
  </link:definitionLink>
</link:linkbase>
