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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:b745c63f-3271-44d3-8d6b-2b9a10b71951,g:1a88350f-b04c-4ce8-925c-c15188ca8708-->
<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.dynamicmaterials.com/role/Cover" xlink:type="simple" xlink:href="boom-20251231.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_71a1afec-6204-4faa-aea9-168253869367" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_DocumentInformationTable_71a1afec-6204-4faa-aea9-168253869367" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_cd39cdc5-d581-4a98-a06f-7c2256974c48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_71a1afec-6204-4faa-aea9-168253869367" xlink:to="loc_us-gaap_StatementClassOfStockAxis_cd39cdc5-d581-4a98-a06f-7c2256974c48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_cd39cdc5-d581-4a98-a06f-7c2256974c48_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_cd39cdc5-d581-4a98-a06f-7c2256974c48" xlink:to="loc_us-gaap_ClassOfStockDomain_cd39cdc5-d581-4a98-a06f-7c2256974c48_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_3ef41f45-d585-457d-8d71-8cf4916b6286" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_cd39cdc5-d581-4a98-a06f-7c2256974c48" xlink:to="loc_us-gaap_ClassOfStockDomain_3ef41f45-d585-457d-8d71-8cf4916b6286" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_45110206-977f-4435-b0a9-7098883d7a2a" 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_ClassOfStockDomain_3ef41f45-d585-457d-8d71-8cf4916b6286" xlink:to="loc_us-gaap_CommonStockMember_45110206-977f-4435-b0a9-7098883d7a2a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_StockPurchaseRightsMember_38c683a5-dab0-4dae-a39d-a3e84212bca6" xlink:href="boom-20251231.xsd#boom_StockPurchaseRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3ef41f45-d585-457d-8d71-8cf4916b6286" xlink:to="loc_boom_StockPurchaseRightsMember_38c683a5-dab0-4dae-a39d-a3e84212bca6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_69ff86b1-6b8c-4b44-8c2a-6587145ec9b9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_DocumentType_69ff86b1-6b8c-4b44-8c2a-6587145ec9b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAnnualReport_88fadb84-5e33-4088-92fd-69824561012d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAnnualReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_DocumentAnnualReport_88fadb84-5e33-4088-92fd-69824561012d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_041397f3-abb0-46e6-822c-3a82bbaf0ffd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_DocumentPeriodEndDate_041397f3-abb0-46e6-822c-3a82bbaf0ffd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_26db20d1-d997-451f-9511-b927365bd56d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_CurrentFiscalYearEndDate_26db20d1-d997-451f-9511-b927365bd56d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_c2496b59-6d68-45da-8d2a-35068781d546" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_DocumentTransitionReport_c2496b59-6d68-45da-8d2a-35068781d546" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_b2ca7361-4cd5-4db1-b65e-f6bad8da4392" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityFileNumber_b2ca7361-4cd5-4db1-b65e-f6bad8da4392" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_2a32d7f3-d8ff-41cc-9f3e-1401d5bb43f6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityRegistrantName_2a32d7f3-d8ff-41cc-9f3e-1401d5bb43f6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_22b6fe46-1093-4d81-b362-1a6b911b6e0c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityIncorporationStateCountryCode_22b6fe46-1093-4d81-b362-1a6b911b6e0c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_bd39d2c0-650c-4206-a924-8ea3411b4d63" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityTaxIdentificationNumber_bd39d2c0-650c-4206-a924-8ea3411b4d63" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_d39e8135-3450-4879-8c94-4d76c28c1d86" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityAddressAddressLine1_d39e8135-3450-4879-8c94-4d76c28c1d86" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_0f66ed40-2cac-4be3-94fb-37c547c9915a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityAddressAddressLine2_0f66ed40-2cac-4be3-94fb-37c547c9915a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_85689b59-dbf3-49f5-af25-212f87773eb7" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityAddressCityOrTown_85689b59-dbf3-49f5-af25-212f87773eb7" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_5d400dc9-6315-4bbe-9422-f476a3160bdd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityAddressStateOrProvince_5d400dc9-6315-4bbe-9422-f476a3160bdd" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_91f1a26f-87f1-4240-af89-da02f671c63d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityAddressPostalZipCode_91f1a26f-87f1-4240-af89-da02f671c63d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_d8d6f0e4-1f43-4fd7-9f73-38dc9b6c2e87" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_CityAreaCode_d8d6f0e4-1f43-4fd7-9f73-38dc9b6c2e87" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_d245d768-8026-4f1e-8b1b-53ba8907cb8e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_LocalPhoneNumber_d245d768-8026-4f1e-8b1b-53ba8907cb8e" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_3a4f4ed9-58d9-4519-97b7-5b9d1275381d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_Security12bTitle_3a4f4ed9-58d9-4519-97b7-5b9d1275381d" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_1c67b91d-8586-4464-993f-f42ef270a4fd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_TradingSymbol_1c67b91d-8586-4464-993f-f42ef270a4fd" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_NoTradingSymbolFlag_1d717b9c-a57d-4213-a1a0-16f425d4a25b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_NoTradingSymbolFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_NoTradingSymbolFlag_1d717b9c-a57d-4213-a1a0-16f425d4a25b" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_2187f391-1837-4d28-a119-b5d38a09f703" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_SecurityExchangeName_2187f391-1837-4d28-a119-b5d38a09f703" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_f418c77a-82dc-49af-9130-21b0ae3f8a10" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_f418c77a-82dc-49af-9130-21b0ae3f8a10" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers_df29f276-753e-425d-a2aa-3549f6c203d0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityVoluntaryFilers_df29f276-753e-425d-a2aa-3549f6c203d0" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_2c31d59a-05de-4241-b456-67ea2486d6f5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityCurrentReportingStatus_2c31d59a-05de-4241-b456-67ea2486d6f5" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_6371008b-2c26-4cb9-a334-0dfa51a0ce33" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityInteractiveDataCurrent_6371008b-2c26-4cb9-a334-0dfa51a0ce33" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_1fa32055-6a5a-47cd-8ce7-269a1204e234" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityFilerCategory_1fa32055-6a5a-47cd-8ce7-269a1204e234" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_aecabbdc-0cc9-49db-aaed-fa598de48537" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntitySmallBusiness_aecabbdc-0cc9-49db-aaed-fa598de48537" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_03484993-35b1-4498-9c67-284e82ee6f8f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityEmergingGrowthCompany_03484993-35b1-4498-9c67-284e82ee6f8f" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_IcfrAuditorAttestationFlag_97e41e9f-acc6-4825-9f0e-bd1e955d59e5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_IcfrAuditorAttestationFlag_97e41e9f-acc6-4825-9f0e-bd1e955d59e5" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFinStmtErrorCorrectionFlag_38d83f41-d214-46e2-a7f1-0423d16df460" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_DocumentFinStmtErrorCorrectionFlag_38d83f41-d214-46e2-a7f1-0423d16df460" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_4c11be39-8bff-4054-bd8d-7900c34a72c0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityShellCompany_4c11be39-8bff-4054-bd8d-7900c34a72c0" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityPublicFloat_5cea4e95-bfb6-48f1-baa7-553c4e6a4562" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityPublicFloat"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityPublicFloat_5cea4e95-bfb6-48f1-baa7-553c4e6a4562" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_98d17a94-73f8-40d6-a5f2-2048ef637c4b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_98d17a94-73f8-40d6-a5f2-2048ef637c4b" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentsIncorporatedByReferenceTextBlock_611cd8ba-1e95-426e-81cf-07f680302aab" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentsIncorporatedByReferenceTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_DocumentsIncorporatedByReferenceTextBlock_611cd8ba-1e95-426e-81cf-07f680302aab" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_26dcb5ec-7ac6-4bdb-8630-c6a9f2521e03" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_EntityCentralIndexKey_26dcb5ec-7ac6-4bdb-8630-c6a9f2521e03" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_fb41cef6-1fbb-4cfb-888e-ad280fd1f48a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_DocumentFiscalYearFocus_fb41cef6-1fbb-4cfb-888e-ad280fd1f48a" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_490e19c0-b73d-4a82-ad56-31751e70fccb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_DocumentFiscalPeriodFocus_490e19c0-b73d-4a82-ad56-31751e70fccb" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_39a92b70-5a6b-411c-b05e-04592b062c4f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_e373c145-c060-4c9b-9e2e-00a333f4107c" xlink:to="loc_dei_AmendmentFlag_39a92b70-5a6b-411c-b05e-04592b062c4f" xlink:type="arc" order="36"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYANDREDEEMABLENONCONTROLLINGINTEREST" xlink:type="simple" xlink:href="boom-20251231.xsd#CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYANDREDEEMABLENONCONTROLLINGINTEREST"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYANDREDEEMABLENONCONTROLLINGINTEREST" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_cbb78abb-57af-4c1f-8b88-42a356ea015d" 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_439da862-a9dc-4281-8ec9-32be8b0f4afc" 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_cbb78abb-57af-4c1f-8b88-42a356ea015d" xlink:to="loc_us-gaap_StatementTable_439da862-a9dc-4281-8ec9-32be8b0f4afc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_d8e07379-afd7-4f18-b5ef-c543afdfc15a" 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_439da862-a9dc-4281-8ec9-32be8b0f4afc" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_d8e07379-afd7-4f18-b5ef-c543afdfc15a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_d8e07379-afd7-4f18-b5ef-c543afdfc15a_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_d8e07379-afd7-4f18-b5ef-c543afdfc15a" xlink:to="loc_us-gaap_EquityComponentDomain_d8e07379-afd7-4f18-b5ef-c543afdfc15a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_4a7ba605-cc95-48a9-925e-00349d8baba9" 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_d8e07379-afd7-4f18-b5ef-c543afdfc15a" xlink:to="loc_us-gaap_EquityComponentDomain_4a7ba605-cc95-48a9-925e-00349d8baba9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_6f2c6ce8-5427-4f37-ad6c-3b9f5835303c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_4a7ba605-cc95-48a9-925e-00349d8baba9" xlink:to="loc_us-gaap_ParentMember_6f2c6ce8-5427-4f37-ad6c-3b9f5835303c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_494627e0-56e0-409a-9ded-a6dc882a7685" 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_ParentMember_6f2c6ce8-5427-4f37-ad6c-3b9f5835303c" xlink:to="loc_us-gaap_CommonStockMember_494627e0-56e0-409a-9ded-a6dc882a7685" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_3d69a068-d56d-42ea-894b-5a6d240aa428" 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_ParentMember_6f2c6ce8-5427-4f37-ad6c-3b9f5835303c" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_3d69a068-d56d-42ea-894b-5a6d240aa428" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_25c6e791-210b-4287-b329-fce3303b8155" 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_ParentMember_6f2c6ce8-5427-4f37-ad6c-3b9f5835303c" xlink:to="loc_us-gaap_RetainedEarningsMember_25c6e791-210b-4287-b329-fce3303b8155" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_826850bc-c6cf-4446-a2af-5fe1f89ac7d4" 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_ParentMember_6f2c6ce8-5427-4f37-ad6c-3b9f5835303c" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_826850bc-c6cf-4446-a2af-5fe1f89ac7d4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_1765373e-fab6-4f31-af8f-53581ade8663" 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_ParentMember_6f2c6ce8-5427-4f37-ad6c-3b9f5835303c" xlink:to="loc_us-gaap_TreasuryStockCommonMember_1765373e-fab6-4f31-af8f-53581ade8663" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" 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_cbb78abb-57af-4c1f-8b88-42a356ea015d" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_c7bdbd31-2725-4d02-97c7-3673464faa5c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_c7bdbd31-2725-4d02-97c7-3673464faa5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_85ccc7b0-39ec-47ca-b041-c381d906d4b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_TreasuryStockCommonShares_85ccc7b0-39ec-47ca-b041-c381d906d4b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_c85e59a6-6549-4ac6-8e4f-90f6f43d9678" 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_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_StockholdersEquity_c85e59a6-6549-4ac6-8e4f-90f6f43d9678" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_00deaab1-58ab-4829-9203-b10cf4e1e370" 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_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_NetIncomeLoss_00deaab1-58ab-4829-9203-b10cf4e1e370" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_76d9eacd-791d-44ea-8abf-dedac643ccbf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax_76d9eacd-791d-44ea-8abf-dedac643ccbf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_4f882be1-c99c-4725-9e5c-bc4f802eb0cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_4f882be1-c99c-4725-9e5c-bc4f802eb0cf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_07f627e3-b8dd-4dbb-8205-d1c60d1ab2ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_07f627e3-b8dd-4dbb-8205-d1c60d1ab2ad" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_410de857-3172-487e-ac96-73fe3a69310d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_410de857-3172-487e-ac96-73fe3a69310d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCash_324d329f-5cb1-405e-8e02-2cf81e1e76ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_DividendsCash_324d329f-5cb1-405e-8e02-2cf81e1e76ee" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestChangeInRedemptionValue_cfdaa896-693d-4424-8cfb-2124705b9d01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestChangeInRedemptionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_MinorityInterestChangeInRedemptionValue_cfdaa896-693d-4424-8cfb-2124705b9d01" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_a19b0284-e531-4ef4-9354-baa3a4c69895" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_a19b0284-e531-4ef4-9354-baa3a4c69895" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_ba6ce6b4-b47d-41ec-bcfa-3d977e371e5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_1ee6c2a6-5c97-4675-a79b-eccea5e71e30" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_ba6ce6b4-b47d-41ec-bcfa-3d977e371e5a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_584a0a4e-1415-4fb2-86d3-5b4dced67f5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_eb47c983-c4d6-44a5-98ce-cbf4a7103c2a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_90d306e0-235d-46d8-8a3f-4a8d7297bbfe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_56670dc9-b97e-4aad-9645-011b0c1a1cd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_cbb78abb-57af-4c1f-8b88-42a356ea015d" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_56670dc9-b97e-4aad-9645-011b0c1a1cd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_3edc7ca5-532b-48b7-8e29-9813d25a396b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_56670dc9-b97e-4aad-9645-011b0c1a1cd6" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_3edc7ca5-532b-48b7-8e29-9813d25a396b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityNetIncome_49f78438-67c5-475e-8056-0bc7c0393334" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityNetIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_56670dc9-b97e-4aad-9645-011b0c1a1cd6" xlink:to="loc_us-gaap_TemporaryEquityNetIncome_49f78438-67c5-475e-8056-0bc7c0393334" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_f25b84a2-ae4a-4cab-a27a-426bb7c956e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_908600d8-6560-4eef-b6f4-a8459e9df456" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_56670dc9-b97e-4aad-9645-011b0c1a1cd6" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_908600d8-6560-4eef-b6f4-a8459e9df456" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestChangeInRedemptionValue_5925a3e8-79aa-4f85-967b-047becc563db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestChangeInRedemptionValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests_b36fa11a-ab93-4fb2-8112-fd33b9fae039" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/ORGANIZATIONANDBUSINESSDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#ORGANIZATIONANDBUSINESSDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/ORGANIZATIONANDBUSINESSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019bfd65-c25c-7036-8cd4-b9ca4c95d314" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019bfd62-989a-7423-9f1b-5b484d0d01e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019bfd65-c25c-7036-8cd4-b9ca4c95d314" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019bfd62-989a-7423-9f1b-5b484d0d01e4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019bfd65-c25c-70d5-9418-692a020c4d09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019bfd62-989a-7423-9f1b-5b484d0d01e4" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019bfd65-c25c-70d5-9418-692a020c4d09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019bfd65-c25c-70d5-9418-692a020c4d09_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019bfd65-c25c-70d5-9418-692a020c4d09" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019bfd65-c25c-70d5-9418-692a020c4d09_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019bfd65-c25c-78c9-aaa5-0a99e8dbe13d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019bfd65-c25c-70d5-9418-692a020c4d09" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019bfd65-c25c-78c9-aaa5-0a99e8dbe13d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsMember_019bfd65-c25c-737d-9721-098c7268834d" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019bfd65-c25c-78c9-aaa5-0a99e8dbe13d" xlink:to="loc_boom_ArcadiaProductsMember_019bfd65-c25c-737d-9721-098c7268834d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019bfd65-c25c-72c0-895a-bd66b7fc9d3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019bfd65-c25c-7036-8cd4-b9ca4c95d314" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019bfd65-c25c-72c0-895a-bd66b7fc9d3e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019bfd65-c25c-7061-9aca-72c5342500f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019bfd65-c25c-7036-8cd4-b9ca4c95d314" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019bfd65-c25c-7061-9aca-72c5342500f6" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#SIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a77d566-c280-487f-bf82-39fd9e311e85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a77d566-c280-487f-bf82-39fd9e311e85" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019c3420-9ee1-7edc-a48c-fe4a998cce5f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a77d566-c280-487f-bf82-39fd9e311e85" xlink:to="loc_srt_OwnershipAxis_019c3420-9ee1-7edc-a48c-fe4a998cce5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019c3420-9ee1-7edc-a48c-fe4a998cce5f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019c3420-9ee1-7edc-a48c-fe4a998cce5f" xlink:to="loc_srt_OwnershipDomain_019c3420-9ee1-7edc-a48c-fe4a998cce5f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019c3420-9ee1-74bd-95b1-f328f803db4f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019c3420-9ee1-7edc-a48c-fe4a998cce5f" xlink:to="loc_srt_OwnershipDomain_019c3420-9ee1-74bd-95b1-f328f803db4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsLLCMember_019c3420-9ee1-7e4f-a6cb-8aa7f24f040c" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019c3420-9ee1-74bd-95b1-f328f803db4f" xlink:to="loc_boom_ArcadiaProductsLLCMember_019c3420-9ee1-7e4f-a6cb-8aa7f24f040c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019c3420-e5b8-7625-8d86-616f134a76b3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a77d566-c280-487f-bf82-39fd9e311e85" xlink:to="loc_srt_CounterpartyNameAxis_019c3420-e5b8-7625-8d86-616f134a76b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c3420-e5b8-7625-8d86-616f134a76b3_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019c3420-e5b8-7625-8d86-616f134a76b3" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c3420-e5b8-7625-8d86-616f134a76b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c3420-e5b8-74fb-bcab-6f7af2132804" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019c3420-e5b8-7625-8d86-616f134a76b3" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c3420-e5b8-74fb-bcab-6f7af2132804" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RedeemableNoncontrollingInterestHolderMember_019c3420-e5b8-797b-8e9b-456309eafdf3" xlink:href="boom-20251231.xsd#boom_RedeemableNoncontrollingInterestHolderMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019c3420-e5b8-74fb-bcab-6f7af2132804" xlink:to="loc_boom_RedeemableNoncontrollingInterestHolderMember_019c3420-e5b8-797b-8e9b-456309eafdf3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c3421-37be-72a6-8983-e37a3332404d" 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_ScheduleOfSegmentReportingInformationBySegmentTable_7a77d566-c280-487f-bf82-39fd9e311e85" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019c3421-37be-72a6-8983-e37a3332404d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c3421-37be-72a6-8983-e37a3332404d_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_019c3421-37be-72a6-8983-e37a3332404d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c3421-37be-72a6-8983-e37a3332404d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c3421-37be-7a99-a2b8-604f88d1bf58" 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_019c3421-37be-72a6-8983-e37a3332404d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019c3421-37be-7a99-a2b8-604f88d1bf58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019c3421-37be-741d-926b-6b4862845e7f" 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_019c3421-37be-7a99-a2b8-604f88d1bf58" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019c3421-37be-741d-926b-6b4862845e7f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_019c3421-37be-7e44-869f-4b96b4bec252" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a77d566-c280-487f-bf82-39fd9e311e85" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_019c3421-37be-7e44-869f-4b96b4bec252" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_019c3421-37be-7e44-869f-4b96b4bec252_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_019c3421-37be-7e44-869f-4b96b4bec252" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_019c3421-37be-7e44-869f-4b96b4bec252_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_019c3421-37be-78bb-83ac-1d9aebd57690" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_019c3421-37be-7e44-869f-4b96b4bec252" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_019c3421-37be-78bb-83ac-1d9aebd57690" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractTerminationMember_019c3421-37be-7571-a025-25f38d2ea8de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractTerminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_019c3421-37be-78bb-83ac-1d9aebd57690" xlink:to="loc_us-gaap_ContractTerminationMember_019c3421-37be-7571-a025-25f38d2ea8de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_AssetImpairmentMember_019c3421-37be-7b07-a894-238c3d50482f" xlink:href="boom-20251231.xsd#boom_AssetImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_019c3421-37be-78bb-83ac-1d9aebd57690" xlink:to="loc_boom_AssetImpairmentMember_019c3421-37be-7b07-a894-238c3d50482f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c3421-37be-7445-8e9d-f6cb19ce5a52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a77d566-c280-487f-bf82-39fd9e311e85" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c3421-37be-7445-8e9d-f6cb19ce5a52" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c3421-37be-7445-8e9d-f6cb19ce5a52_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c3421-37be-7445-8e9d-f6cb19ce5a52" xlink:to="loc_us-gaap_SegmentDomain_019c3421-37be-7445-8e9d-f6cb19ce5a52_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c3421-37be-7e67-bbb4-a2ab9947ba40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c3421-37be-7445-8e9d-f6cb19ce5a52" xlink:to="loc_us-gaap_SegmentDomain_019c3421-37be-7e67-bbb4-a2ab9947ba40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_NobelCladSegmentMember_019c3421-37be-7adf-9c2a-be2225a8fb01" xlink:href="boom-20251231.xsd#boom_NobelCladSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c3421-37be-7e67-bbb4-a2ab9947ba40" xlink:to="loc_boom_NobelCladSegmentMember_019c3421-37be-7adf-9c2a-be2225a8fb01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DynaEnergeticsSegmentMember_019c3421-37be-76a8-80e2-18725dbbbf28" xlink:href="boom-20251231.xsd#boom_DynaEnergeticsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c3421-37be-7e67-bbb4-a2ab9947ba40" xlink:to="loc_boom_DynaEnergeticsSegmentMember_019c3421-37be-76a8-80e2-18725dbbbf28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019c3421-37be-74ce-94eb-d3877b952a93" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a77d566-c280-487f-bf82-39fd9e311e85" xlink:to="loc_srt_ConsolidationItemsAxis_019c3421-37be-74ce-94eb-d3877b952a93" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c3421-37be-74ce-94eb-d3877b952a93_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019c3421-37be-74ce-94eb-d3877b952a93" xlink:to="loc_srt_ConsolidationItemsDomain_019c3421-37be-74ce-94eb-d3877b952a93_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c3421-37be-7e84-9501-6a09d5f952e5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019c3421-37be-74ce-94eb-d3877b952a93" xlink:to="loc_srt_ConsolidationItemsDomain_019c3421-37be-7e84-9501-6a09d5f952e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019c3421-37be-7465-ba80-9106dea8fd40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c3421-37be-7e84-9501-6a09d5f952e5" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019c3421-37be-7465-ba80-9106dea8fd40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c342a-509a-73bd-aebf-282db1d6e47f" 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_ScheduleOfSegmentReportingInformationBySegmentTable_7a77d566-c280-487f-bf82-39fd9e311e85" xlink:to="loc_srt_RangeAxis_019c342a-509a-73bd-aebf-282db1d6e47f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c342a-509a-73bd-aebf-282db1d6e47f_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_019c342a-509a-73bd-aebf-282db1d6e47f" xlink:to="loc_srt_RangeMember_019c342a-509a-73bd-aebf-282db1d6e47f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c342a-509a-77d5-bab1-54ed138b1eda" 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_019c342a-509a-73bd-aebf-282db1d6e47f" xlink:to="loc_srt_RangeMember_019c342a-509a-77d5-bab1-54ed138b1eda" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c342a-509a-7d3c-8db7-d2dbe22cfe9e" 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_019c342a-509a-77d5-bab1-54ed138b1eda" xlink:to="loc_srt_MinimumMember_019c342a-509a-7d3c-8db7-d2dbe22cfe9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c342a-509a-7602-8a7a-69327818483c" 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_019c342a-509a-77d5-bab1-54ed138b1eda" xlink:to="loc_srt_MaximumMember_019c342a-509a-7602-8a7a-69327818483c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_AccountsReceivableCreditLossExpenseReversalNet_0efcc224-d581-4ae3-8130-b762b8d7fcd4" xlink:href="boom-20251231.xsd#boom_AccountsReceivableCreditLossExpenseReversalNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_boom_AccountsReceivableCreditLossExpenseReversalNet_0efcc224-d581-4ae3-8130-b762b8d7fcd4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_1114b2ab-d8f7-4f7f-8e36-dc10f795968a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_1114b2ab-d8f7-4f7f-8e36-dc10f795968a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCash_8f3f0f9a-a666-4478-a77f-ec9cb833d9d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_DividendsCash_8f3f0f9a-a666-4478-a77f-ec9cb833d9d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RedeemableNoncontrollingInterestCashPaymentsForRepurchasePercentage_019c339a-5097-7c7f-8665-870cc0f9a663" xlink:href="boom-20251231.xsd#boom_RedeemableNoncontrollingInterestCashPaymentsForRepurchasePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_boom_RedeemableNoncontrollingInterestCashPaymentsForRepurchasePercentage_019c339a-5097-7c7f-8665-870cc0f9a663" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RedeemableNoncontrollingInterestPreferredStockPercentage_019c339a-5097-7326-8f0a-2c1b3f45a133" xlink:href="boom-20251231.xsd#boom_RedeemableNoncontrollingInterestPreferredStockPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_boom_RedeemableNoncontrollingInterestPreferredStockPercentage_019c339a-5097-7326-8f0a-2c1b3f45a133" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RedeemableNoncontrollingInterestWeightedAverageTradingPriceTrailingPeriod_019c47b9-5c1d-7b15-b03a-c37f56a295cc" xlink:href="boom-20251231.xsd#boom_RedeemableNoncontrollingInterestWeightedAverageTradingPriceTrailingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_boom_RedeemableNoncontrollingInterestWeightedAverageTradingPriceTrailingPeriod_019c47b9-5c1d-7b15-b03a-c37f56a295cc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RedeemableNoncontrollingInterestDividendRatePercentage_019c4758-0530-7f74-997a-4bc54a5df013" xlink:href="boom-20251231.xsd#boom_RedeemableNoncontrollingInterestDividendRatePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_boom_RedeemableNoncontrollingInterestDividendRatePercentage_019c4758-0530-7f74-997a-4bc54a5df013" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_019c47b7-f8d4-7132-8ecb-e50caa8dbe9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_ConvertiblePreferredStockSharesIssuedUponConversion_019c47b7-f8d4-7132-8ecb-e50caa8dbe9c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_a2ecc1a2-1d36-4710-8223-1f2d0cd452e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_a2ecc1a2-1d36-4710-8223-1f2d0cd452e9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndNotesReceivableNet_07e72b06-7107-405f-a9c1-a6a399c1d9bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsAndNotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_AccountsAndNotesReceivableNet_07e72b06-7107-405f-a9c1-a6a399c1d9bb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RevenueFromContractWithCustomerPaymentTermsPeriod_aafb7dbf-be7e-487f-ac07-75228dcb77bf" xlink:href="boom-20251231.xsd#boom_RevenueFromContractWithCustomerPaymentTermsPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_boom_RevenueFromContractWithCustomerPaymentTermsPeriod_aafb7dbf-be7e-487f-ac07-75228dcb77bf" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_4725898c-46e5-414e-98e4-08b0e6cf716d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_4725898c-46e5-414e-98e4-08b0e6cf716d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_8bf2f09a-9dbb-4f13-9725-3b044da8d67c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_8bf2f09a-9dbb-4f13-9725-3b044da8d67c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_ae95584b-ee22-4fd3-9b5d-ae7f2b0be48d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_NumberOfReportableSegments_ae95584b-ee22-4fd3-9b5d-ae7f2b0be48d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_019b089f-d64d-782e-a3b0-8153080f7ad9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostsAndAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_019b089f-d64d-782e-a3b0-8153080f7ad9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ProceedsFromGovernmentAssistanceReimbursementsOfPropertyPlantAndEquipment_019bc5a5-3381-7767-be2a-7092ef16f020" xlink:href="boom-20251231.xsd#boom_ProceedsFromGovernmentAssistanceReimbursementsOfPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_06d9175b-8003-4b62-89ca-f75460355d67" xlink:to="loc_boom_ProceedsFromGovernmentAssistanceReimbursementsOfPropertyPlantAndEquipment_019bc5a5-3381-7767-be2a-7092ef16f020" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESRollforwardofAllowanceforDoubtfulAccountsDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#SIGNIFICANTACCOUNTINGPOLICIESRollforwardofAllowanceforDoubtfulAccountsDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESRollforwardofAllowanceforDoubtfulAccountsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_8232127c-9c07-4e67-9a38-5acf845cd5fe" 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_953e0b00-242b-4706-b931-84265da35f42" 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_8232127c-9c07-4e67-9a38-5acf845cd5fe" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_953e0b00-242b-4706-b931-84265da35f42" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_75c36429-480f-4600-85c3-258f6b5e8653" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_953e0b00-242b-4706-b931-84265da35f42" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_75c36429-480f-4600-85c3-258f6b5e8653" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_75c36429-480f-4600-85c3-258f6b5e8653_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_75c36429-480f-4600-85c3-258f6b5e8653" xlink:to="loc_us-gaap_SegmentDomain_75c36429-480f-4600-85c3-258f6b5e8653_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_d9b107c3-0e36-497e-9d2d-07a8bb2b8d54" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_75c36429-480f-4600-85c3-258f6b5e8653" xlink:to="loc_us-gaap_SegmentDomain_d9b107c3-0e36-497e-9d2d-07a8bb2b8d54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsSegmentMember_3d33172f-fee5-4557-96cc-1daa87639623" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_d9b107c3-0e36-497e-9d2d-07a8bb2b8d54" xlink:to="loc_boom_ArcadiaProductsSegmentMember_3d33172f-fee5-4557-96cc-1daa87639623" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DynaEnergeticsSegmentMember_005423d6-5dc3-4a9f-9135-b7166deeeff2" xlink:href="boom-20251231.xsd#boom_DynaEnergeticsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_d9b107c3-0e36-497e-9d2d-07a8bb2b8d54" xlink:to="loc_boom_DynaEnergeticsSegmentMember_005423d6-5dc3-4a9f-9135-b7166deeeff2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_NobelCladSegmentMember_34010a0e-7396-438b-88d3-0224e6533507" xlink:href="boom-20251231.xsd#boom_NobelCladSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_d9b107c3-0e36-497e-9d2d-07a8bb2b8d54" xlink:to="loc_boom_NobelCladSegmentMember_34010a0e-7396-438b-88d3-0224e6533507" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_1b406a64-afe2-49d0-aac5-a978c55c0fad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_8232127c-9c07-4e67-9a38-5acf845cd5fe" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_1b406a64-afe2-49d0-aac5-a978c55c0fad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_fef2457d-bb30-4b38-b77a-2bd781234bb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_1b406a64-afe2-49d0-aac5-a978c55c0fad" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_fef2457d-bb30-4b38-b77a-2bd781234bb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_5be2c408-38d4-4812-bc90-37a98801f580" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_1b406a64-afe2-49d0-aac5-a978c55c0fad" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_5be2c408-38d4-4812-bc90-37a98801f580" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_95758f65-a076-4d26-9897-3e3650f93301" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_1b406a64-afe2-49d0-aac5-a978c55c0fad" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs_95758f65-a076-4d26-9897-3e3650f93301" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_6c8d71ea-6dfa-47da-8420-63defe31bf48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_1b406a64-afe2-49d0-aac5-a978c55c0fad" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRecoveries_6c8d71ea-6dfa-47da-8420-63defe31bf48" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_AccountsReceivableAllowanceForCreditLossGainLossOnForeignCurrency_19f53d27-9ccd-4193-9d12-df8f6264f438" xlink:href="boom-20251231.xsd#boom_AccountsReceivableAllowanceForCreditLossGainLossOnForeignCurrency"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableRollforward_1b406a64-afe2-49d0-aac5-a978c55c0fad" xlink:to="loc_boom_AccountsReceivableAllowanceForCreditLossGainLossOnForeignCurrency_19f53d27-9ccd-4193-9d12-df8f6264f438" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_05f922e0-ebbe-4450-a607-d94189659541" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#SIGNIFICANTACCOUNTINGPOLICIESPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESPropertyPlantandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_17ac3cd3-dcc0-4458-9309-33969fe79067" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_a0e16e74-6e3d-4312-a3ee-451356cfe65e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_17ac3cd3-dcc0-4458-9309-33969fe79067" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_a0e16e74-6e3d-4312-a3ee-451356cfe65e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b6265134-b45b-4898-97c4-eb048d8c9079" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_a0e16e74-6e3d-4312-a3ee-451356cfe65e" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b6265134-b45b-4898-97c4-eb048d8c9079" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b6265134-b45b-4898-97c4-eb048d8c9079_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b6265134-b45b-4898-97c4-eb048d8c9079" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b6265134-b45b-4898-97c4-eb048d8c9079_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e1211547-de61-424e-aa84-d44fa5c684c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b6265134-b45b-4898-97c4-eb048d8c9079" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e1211547-de61-424e-aa84-d44fa5c684c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_3be66d3e-8228-40e3-9a9d-d614701249d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e1211547-de61-424e-aa84-d44fa5c684c3" xlink:to="loc_us-gaap_LandMember_3be66d3e-8228-40e3-9a9d-d614701249d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_ce984a1d-afcf-4c69-befc-86436bc060ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e1211547-de61-424e-aa84-d44fa5c684c3" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_ce984a1d-afcf-4c69-befc-86436bc060ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ToolsDiesAndMoldsMember_5e274925-0be1-4042-adbf-d80c7fcc5f29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ToolsDiesAndMoldsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e1211547-de61-424e-aa84-d44fa5c684c3" xlink:to="loc_us-gaap_ToolsDiesAndMoldsMember_5e274925-0be1-4042-adbf-d80c7fcc5f29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_FurnitureFixturesAndComputerEquipmentMember_e866b81f-9f1f-488a-b7a5-554efcfea59f" xlink:href="boom-20251231.xsd#boom_FurnitureFixturesAndComputerEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e1211547-de61-424e-aa84-d44fa5c684c3" xlink:to="loc_boom_FurnitureFixturesAndComputerEquipmentMember_e866b81f-9f1f-488a-b7a5-554efcfea59f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_4fa351a0-e0fb-4433-a6ce-8d213a6b89fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentOtherTypesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e1211547-de61-424e-aa84-d44fa5c684c3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_4fa351a0-e0fb-4433-a6ce-8d213a6b89fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_f32b9ef5-f191-4dcc-97f8-17d05d9dc521" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_e1211547-de61-424e-aa84-d44fa5c684c3" xlink:to="loc_us-gaap_ConstructionInProgressMember_f32b9ef5-f191-4dcc-97f8-17d05d9dc521" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_15b69608-04a5-4192-bf45-e44c1473db4e" 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_ScheduleOfPropertyPlantAndEquipmentTable_a0e16e74-6e3d-4312-a3ee-451356cfe65e" xlink:to="loc_srt_RangeAxis_15b69608-04a5-4192-bf45-e44c1473db4e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_15b69608-04a5-4192-bf45-e44c1473db4e_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_15b69608-04a5-4192-bf45-e44c1473db4e" xlink:to="loc_srt_RangeMember_15b69608-04a5-4192-bf45-e44c1473db4e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_07157e61-841b-48bd-b4ce-e22a025b3b44" 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_15b69608-04a5-4192-bf45-e44c1473db4e" xlink:to="loc_srt_RangeMember_07157e61-841b-48bd-b4ce-e22a025b3b44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a5ce75fd-ad56-4055-bd03-c0f130f6cf6f" 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_07157e61-841b-48bd-b4ce-e22a025b3b44" xlink:to="loc_srt_MinimumMember_a5ce75fd-ad56-4055-bd03-c0f130f6cf6f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a452dbd0-fead-4709-8b54-80330213fd21" 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_07157e61-841b-48bd-b4ce-e22a025b3b44" xlink:to="loc_srt_MaximumMember_a452dbd0-fead-4709-8b54-80330213fd21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_d56d69bd-44d6-4d71-acda-668c6eb207c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_17ac3cd3-dcc0-4458-9309-33969fe79067" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_d56d69bd-44d6-4d71-acda-668c6eb207c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_245f1868-ddd2-4182-9939-a53569467f3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_17ac3cd3-dcc0-4458-9309-33969fe79067" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_245f1868-ddd2-4182-9939-a53569467f3e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESContractLiabilitiesDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#SIGNIFICANTACCOUNTINGPOLICIESContractLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESContractLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_boom_RevenueInitialApplicationsOfPeriodCumulativeEffectTransitionsLineItems_4c3250a2-f47e-4318-829f-b073a17f9cb2" xlink:href="boom-20251231.xsd#boom_RevenueInitialApplicationsOfPeriodCumulativeEffectTransitionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ba630123-205d-444a-887e-d9c910239546" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_boom_RevenueInitialApplicationsOfPeriodCumulativeEffectTransitionsLineItems_4c3250a2-f47e-4318-829f-b073a17f9cb2" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ba630123-205d-444a-887e-d9c910239546" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_439cf444-34cc-4f80-9d5d-3f98b5057570" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_ba630123-205d-444a-887e-d9c910239546" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_439cf444-34cc-4f80-9d5d-3f98b5057570" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_439cf444-34cc-4f80-9d5d-3f98b5057570_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_439cf444-34cc-4f80-9d5d-3f98b5057570" xlink:to="loc_us-gaap_SegmentDomain_439cf444-34cc-4f80-9d5d-3f98b5057570_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_b942abdc-f681-4739-83f8-373a0c22d80e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_439cf444-34cc-4f80-9d5d-3f98b5057570" xlink:to="loc_us-gaap_SegmentDomain_b942abdc-f681-4739-83f8-373a0c22d80e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsSegmentMember_287a1154-f79d-4141-aa82-f9cdfd354cda" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_b942abdc-f681-4739-83f8-373a0c22d80e" xlink:to="loc_boom_ArcadiaProductsSegmentMember_287a1154-f79d-4141-aa82-f9cdfd354cda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DynaEnergeticsSegmentMember_3c8b9683-f18f-4c04-9ea4-c7cbf5947710" xlink:href="boom-20251231.xsd#boom_DynaEnergeticsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_b942abdc-f681-4739-83f8-373a0c22d80e" xlink:to="loc_boom_DynaEnergeticsSegmentMember_3c8b9683-f18f-4c04-9ea4-c7cbf5947710" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_NobelCladSegmentMember_ad9f599b-071c-4205-9db2-f63b3b7729a5" xlink:href="boom-20251231.xsd#boom_NobelCladSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_b942abdc-f681-4739-83f8-373a0c22d80e" xlink:to="loc_boom_NobelCladSegmentMember_ad9f599b-071c-4205-9db2-f63b3b7729a5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_e5542acc-f257-4b61-839a-4aac746c1a94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_RevenueInitialApplicationsOfPeriodCumulativeEffectTransitionsLineItems_4c3250a2-f47e-4318-829f-b073a17f9cb2" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_e5542acc-f257-4b61-839a-4aac746c1a94" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESRestructuringCostsDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#SIGNIFICANTACCOUNTINGPOLICIESRestructuringCostsDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/SIGNIFICANTACCOUNTINGPOLICIESRestructuringCostsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_e8505a9f-41c6-47c0-a289-d5fcf5298f0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_23495974-ccdd-4d1a-a5a9-f6a0ebe12b64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e8505a9f-41c6-47c0-a289-d5fcf5298f0b" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_23495974-ccdd-4d1a-a5a9-f6a0ebe12b64" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_131b9c8d-e51f-4b91-9409-8ac4b3d170a7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_23495974-ccdd-4d1a-a5a9-f6a0ebe12b64" xlink:to="loc_srt_ConsolidationItemsAxis_131b9c8d-e51f-4b91-9409-8ac4b3d170a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_131b9c8d-e51f-4b91-9409-8ac4b3d170a7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_131b9c8d-e51f-4b91-9409-8ac4b3d170a7" xlink:to="loc_srt_ConsolidationItemsDomain_131b9c8d-e51f-4b91-9409-8ac4b3d170a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_050baf2f-a4e4-4562-a5a6-3f4b792e6a43" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_131b9c8d-e51f-4b91-9409-8ac4b3d170a7" xlink:to="loc_srt_ConsolidationItemsDomain_050baf2f-a4e4-4562-a5a6-3f4b792e6a43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_92c8e66b-fc58-4c3d-91a0-7f892097bc74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_050baf2f-a4e4-4562-a5a6-3f4b792e6a43" xlink:to="loc_us-gaap_OperatingSegmentsMember_92c8e66b-fc58-4c3d-91a0-7f892097bc74" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_389edcfc-b059-4def-9ca7-5722e178ec14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_050baf2f-a4e4-4562-a5a6-3f4b792e6a43" xlink:to="loc_us-gaap_CorporateNonSegmentMember_389edcfc-b059-4def-9ca7-5722e178ec14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_59fa9bcb-6af5-4a2b-be98-271d7a647c18" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_23495974-ccdd-4d1a-a5a9-f6a0ebe12b64" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_59fa9bcb-6af5-4a2b-be98-271d7a647c18" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_59fa9bcb-6af5-4a2b-be98-271d7a647c18_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_59fa9bcb-6af5-4a2b-be98-271d7a647c18" xlink:to="loc_us-gaap_SegmentDomain_59fa9bcb-6af5-4a2b-be98-271d7a647c18_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_2113b19c-85f2-4e4d-a170-120deab0973a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_59fa9bcb-6af5-4a2b-be98-271d7a647c18" xlink:to="loc_us-gaap_SegmentDomain_2113b19c-85f2-4e4d-a170-120deab0973a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsLLCMember_3f1bee01-2f9c-4cd4-a851-1d75edd18042" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2113b19c-85f2-4e4d-a170-120deab0973a" xlink:to="loc_boom_ArcadiaProductsLLCMember_3f1bee01-2f9c-4cd4-a851-1d75edd18042" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DynaEnergeticsSegmentMember_bdaa5bf3-ac5b-4da6-bb9c-de322e327c68" xlink:href="boom-20251231.xsd#boom_DynaEnergeticsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2113b19c-85f2-4e4d-a170-120deab0973a" xlink:to="loc_boom_DynaEnergeticsSegmentMember_bdaa5bf3-ac5b-4da6-bb9c-de322e327c68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_NobelCladSegmentMember_ba5f7b06-7603-4499-ba98-2c4a249bf718" xlink:href="boom-20251231.xsd#boom_NobelCladSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_2113b19c-85f2-4e4d-a170-120deab0973a" xlink:to="loc_boom_NobelCladSegmentMember_ba5f7b06-7603-4499-ba98-2c4a249bf718" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_65d21732-729d-4eb2-8e90-d8b93dcf7f44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_23495974-ccdd-4d1a-a5a9-f6a0ebe12b64" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_65d21732-729d-4eb2-8e90-d8b93dcf7f44" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_65d21732-729d-4eb2-8e90-d8b93dcf7f44_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_65d21732-729d-4eb2-8e90-d8b93dcf7f44" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_65d21732-729d-4eb2-8e90-d8b93dcf7f44_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_547ba562-5670-4eec-9cd1-c2ae64d42551" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_65d21732-729d-4eb2-8e90-d8b93dcf7f44" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_547ba562-5670-4eec-9cd1-c2ae64d42551" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_6c3c209f-d2c4-43ec-a7e5-f68c06aa25bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_547ba562-5670-4eec-9cd1-c2ae64d42551" xlink:to="loc_us-gaap_EmployeeSeveranceMember_6c3c209f-d2c4-43ec-a7e5-f68c06aa25bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_AssetImpairmentMember_b6f651f7-9809-42b1-a0cb-22b5bab11367" xlink:href="boom-20251231.xsd#boom_AssetImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_547ba562-5670-4eec-9cd1-c2ae64d42551" xlink:to="loc_boom_AssetImpairmentMember_b6f651f7-9809-42b1-a0cb-22b5bab11367" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractTerminationMember_a6b20daa-ba30-4d50-9932-34faa14b81f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractTerminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_547ba562-5670-4eec-9cd1-c2ae64d42551" xlink:to="loc_us-gaap_ContractTerminationMember_a6b20daa-ba30-4d50-9932-34faa14b81f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FacilityClosingMember_019c5ce5-9ea4-7055-be11-e1cf9e1a0306" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FacilityClosingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_547ba562-5670-4eec-9cd1-c2ae64d42551" xlink:to="loc_us-gaap_FacilityClosingMember_019c5ce5-9ea4-7055-be11-e1cf9e1a0306" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_StockBasedCompensationMember_a328a6e9-b647-4a27-82c8-358b05a46e52" xlink:href="boom-20251231.xsd#boom_StockBasedCompensationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_547ba562-5670-4eec-9cd1-c2ae64d42551" xlink:to="loc_boom_StockBasedCompensationMember_a328a6e9-b647-4a27-82c8-358b05a46e52" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_bd2777bf-dd10-449e-a7a6-a32f258a4be4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostsAndAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e8505a9f-41c6-47c0-a289-d5fcf5298f0b" xlink:to="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_bd2777bf-dd10-449e-a7a6-a32f258a4be4" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/INVENTORIESDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#INVENTORIESDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/INVENTORIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryLineItems_ce590c33-df27-4310-b418-d184f9e2a5d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryCurrentTable_257fbeae-a995-40d2-8e68-1c490a54d980" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryCurrentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InventoryLineItems_ce590c33-df27-4310-b418-d184f9e2a5d7" xlink:to="loc_us-gaap_InventoryCurrentTable_257fbeae-a995-40d2-8e68-1c490a54d980" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_5eaac669-d614-48f7-9f92-168806e3a492" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_257fbeae-a995-40d2-8e68-1c490a54d980" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_5eaac669-d614-48f7-9f92-168806e3a492" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_5eaac669-d614-48f7-9f92-168806e3a492_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5eaac669-d614-48f7-9f92-168806e3a492" xlink:to="loc_us-gaap_SegmentDomain_5eaac669-d614-48f7-9f92-168806e3a492_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_63dd737c-af9e-49ed-8727-d8a770126438" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_5eaac669-d614-48f7-9f92-168806e3a492" xlink:to="loc_us-gaap_SegmentDomain_63dd737c-af9e-49ed-8727-d8a770126438" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsSegmentMember_6314f24e-cf88-40c3-9388-aa04e54c3d39" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_63dd737c-af9e-49ed-8727-d8a770126438" xlink:to="loc_boom_ArcadiaProductsSegmentMember_6314f24e-cf88-40c3-9388-aa04e54c3d39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DynaEnergeticsSegmentMember_bf16d44f-5412-492f-b33d-fcfd103d41cb" xlink:href="boom-20251231.xsd#boom_DynaEnergeticsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_63dd737c-af9e-49ed-8727-d8a770126438" xlink:to="loc_boom_DynaEnergeticsSegmentMember_bf16d44f-5412-492f-b33d-fcfd103d41cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_NobelCladSegmentMember_018d195c-7550-47d1-9882-a3196fbe414f" xlink:href="boom-20251231.xsd#boom_NobelCladSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_63dd737c-af9e-49ed-8727-d8a770126438" xlink:to="loc_boom_NobelCladSegmentMember_018d195c-7550-47d1-9882-a3196fbe414f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_b4790c8d-01c5-4a40-9910-f661795d2329" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryRawMaterialsNetOfReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ce590c33-df27-4310-b418-d184f9e2a5d7" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_b4790c8d-01c5-4a40-9910-f661795d2329" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_f73c1a10-512a-47b7-86e4-fcaa74746691" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryWorkInProcessNetOfReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ce590c33-df27-4310-b418-d184f9e2a5d7" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_f73c1a10-512a-47b7-86e4-fcaa74746691" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_8d4f4f88-37ab-4c31-b32d-2bf9f629ce08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ce590c33-df27-4310-b418-d184f9e2a5d7" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_8d4f4f88-37ab-4c31-b32d-2bf9f629ce08" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventorySuppliesNetOfReserves_e78ce4c8-277f-4c14-9b3b-483cdabc6b64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventorySuppliesNetOfReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ce590c33-df27-4310-b418-d184f9e2a5d7" xlink:to="loc_us-gaap_InventorySuppliesNetOfReserves_e78ce4c8-277f-4c14-9b3b-483cdabc6b64" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_5541aaa1-b6da-4172-acf9-09408f749011" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ce590c33-df27-4310-b418-d184f9e2a5d7" xlink:to="loc_us-gaap_InventoryNet_5541aaa1-b6da-4172-acf9-09408f749011" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/PURCHASEDINTANGIBLEASSETSWeightedAverageAmortizationDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#PURCHASEDINTANGIBLEASSETSWeightedAverageAmortizationDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/PURCHASEDINTANGIBLEASSETSWeightedAverageAmortizationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_baa67521-009e-49ca-be44-adbb708b3c44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_4735f7fc-b0d7-4674-8861-beee7473b226" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_baa67521-009e-49ca-be44-adbb708b3c44" xlink:to="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_4735f7fc-b0d7-4674-8861-beee7473b226" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_8433cbd5-084a-4198-88d3-242815eabb13" 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_ScheduleOfAcquiredFiniteLivedIntangibleAssetByMajorClassTable_4735f7fc-b0d7-4674-8861-beee7473b226" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_8433cbd5-084a-4198-88d3-242815eabb13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8433cbd5-084a-4198-88d3-242815eabb13_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_8433cbd5-084a-4198-88d3-242815eabb13" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_8433cbd5-084a-4198-88d3-242815eabb13_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_23fb7498-68eb-4f43-9975-75961362d948" 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_8433cbd5-084a-4198-88d3-242815eabb13" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_23fb7498-68eb-4f43-9975-75961362d948" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_46037595-8d68-4b99-930c-06afaecac02f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_23fb7498-68eb-4f43-9975-75961362d948" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_46037595-8d68-4b99-930c-06afaecac02f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_f2440afe-5947-4f0e-8a65-c7f71b397b37" 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_23fb7498-68eb-4f43-9975-75961362d948" xlink:to="loc_us-gaap_CustomerRelationshipsMember_f2440afe-5947-4f0e-8a65-c7f71b397b37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_6563421b-6012-43c0-945f-4e75996fc18b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_23fb7498-68eb-4f43-9975-75961362d948" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_6563421b-6012-43c0-945f-4e75996fc18b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_1eb938b8-376c-4ca5-8772-a811e9d05fe9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_baa67521-009e-49ca-be44-adbb708b3c44" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_1eb938b8-376c-4ca5-8772-a811e9d05fe9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_45ce641e-2ef6-4a20-b6dc-fc2459bc3fdf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_baa67521-009e-49ca-be44-adbb708b3c44" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_45ce641e-2ef6-4a20-b6dc-fc2459bc3fdf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_331239d2-2a7a-4ded-bc21-387d8ef0f9e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_baa67521-009e-49ca-be44-adbb708b3c44" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_331239d2-2a7a-4ded-bc21-387d8ef0f9e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_3b187f85-1f2a-4153-bb03-0343fab7edda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsLineItems_baa67521-009e-49ca-be44-adbb708b3c44" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_3b187f85-1f2a-4153-bb03-0343fab7edda" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/LEASESNarrativeDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#LEASESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/LEASESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" 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_f9648ea0-6f09-4a66-96d7-bb5d3c0e7cfa" 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_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_f9648ea0-6f09-4a66-96d7-bb5d3c0e7cfa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_c1c5f77e-7480-4a35-a915-c1892bf00c5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_f9648ea0-6f09-4a66-96d7-bb5d3c0e7cfa" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_c1c5f77e-7480-4a35-a915-c1892bf00c5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c1c5f77e-7480-4a35-a915-c1892bf00c5f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_c1c5f77e-7480-4a35-a915-c1892bf00c5f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_c1c5f77e-7480-4a35-a915-c1892bf00c5f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_80d67e96-6609-4c1b-82bc-37a5edd9f341" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_c1c5f77e-7480-4a35-a915-c1892bf00c5f" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_80d67e96-6609-4c1b-82bc-37a5edd9f341" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsMember_d8862c31-1f9e-473f-9f0c-0f39eba7c999" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_80d67e96-6609-4c1b-82bc-37a5edd9f341" xlink:to="loc_boom_ArcadiaProductsMember_d8862c31-1f9e-473f-9f0c-0f39eba7c999" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_6c1b7087-da97-4bb7-ad17-40ef5a3bc19d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_f9648ea0-6f09-4a66-96d7-bb5d3c0e7cfa" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_6c1b7087-da97-4bb7-ad17-40ef5a3bc19d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_6c1b7087-da97-4bb7-ad17-40ef5a3bc19d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_6c1b7087-da97-4bb7-ad17-40ef5a3bc19d" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_6c1b7087-da97-4bb7-ad17-40ef5a3bc19d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_8f61756c-d586-499c-a48e-55de6ab30965" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_6c1b7087-da97-4bb7-ad17-40ef5a3bc19d" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_8f61756c-d586-499c-a48e-55de6ab30965" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_OperatingLeasesMember_9f1a6792-3bd1-4df0-bc03-6e48187cf702" xlink:href="boom-20251231.xsd#boom_OperatingLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_8f61756c-d586-499c-a48e-55de6ab30965" xlink:to="loc_boom_OperatingLeasesMember_9f1a6792-3bd1-4df0-bc03-6e48187cf702" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_38150317-310d-4c3c-b0d7-185806f49f67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_38150317-310d-4c3c-b0d7-185806f49f67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_667c0cad-d22c-466e-baed-4e7905882925" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_667c0cad-d22c-466e-baed-4e7905882925" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_50796a5f-4353-45ec-a8dc-7d6e7bdf2775" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_50796a5f-4353-45ec-a8dc-7d6e7bdf2775" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_LesseeRelatedPartyOperatingLeaseNumberOfLeases_1cfdf130-b32c-4f91-9b53-1a7e9957655f" xlink:href="boom-20251231.xsd#boom_LesseeRelatedPartyOperatingLeaseNumberOfLeases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_boom_LesseeRelatedPartyOperatingLeaseNumberOfLeases_1cfdf130-b32c-4f91-9b53-1a7e9957655f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAsset_6e6774f1-eefa-4891-942d-554bf7af2443" xlink:href="boom-20251231.xsd#boom_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_boom_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAsset_6e6774f1-eefa-4891-942d-554bf7af2443" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability_fbcbcdcd-a380-49a7-bb1d-cd1af9e3b807" xlink:href="boom-20251231.xsd#boom_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_boom_BusinessCombinationAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability_fbcbcdcd-a380-49a7-bb1d-cd1af9e3b807" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_32e39a41-d432-4227-80ef-6a49cce3a600" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_32e39a41-d432-4227-80ef-6a49cce3a600" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_c040cd3e-d599-4218-a940-e342e3b664e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_us-gaap_OperatingLeaseCost_c040cd3e-d599-4218-a940-e342e3b664e2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_a0518cf7-e423-443e-b9a9-f425717311ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_dda52981-147f-41ab-ba13-43f0a3fc5604" xlink:to="loc_us-gaap_LesseeOperatingLeaseRenewalTerm_a0518cf7-e423-443e-b9a9-f425717311ec" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/DEBTScheduleofDebtDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#DEBTScheduleofDebtDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/DEBTScheduleofDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019b0911-8ba3-7259-97d8-5374c513c693" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_2b8f9890-e475-41ee-bbf7-bd8307c7bed0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b0911-8ba3-7259-97d8-5374c513c693" xlink:to="loc_us-gaap_DebtInstrumentTable_2b8f9890-e475-41ee-bbf7-bd8307c7bed0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b0911-8ba3-73b2-95d8-d14093fb0a36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2b8f9890-e475-41ee-bbf7-bd8307c7bed0" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b0911-8ba3-73b2-95d8-d14093fb0a36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b0911-8ba3-73b2-95d8-d14093fb0a36_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b0911-8ba3-73b2-95d8-d14093fb0a36" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b0911-8ba3-73b2-95d8-d14093fb0a36_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b0911-8ba3-7aad-b66b-ffadd6b7c050" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b0911-8ba3-73b2-95d8-d14093fb0a36" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b0911-8ba3-7aad-b66b-ffadd6b7c050" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_CreditAgreementFacilityMember_019b0911-8ba3-7c42-8892-dc1505ce08f3" xlink:href="boom-20251231.xsd#boom_CreditAgreementFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b0911-8ba3-7aad-b66b-ffadd6b7c050" xlink:to="loc_boom_CreditAgreementFacilityMember_019b0911-8ba3-7c42-8892-dc1505ce08f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_EuropeanLineOfCreditMember_019b0911-8ba3-7239-b265-61da3982c6e4" xlink:href="boom-20251231.xsd#boom_EuropeanLineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b0911-8ba3-7aad-b66b-ffadd6b7c050" xlink:to="loc_boom_EuropeanLineOfCreditMember_019b0911-8ba3-7239-b265-61da3982c6e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019b0911-8ba3-7199-ad42-bd370ee92e6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2b8f9890-e475-41ee-bbf7-bd8307c7bed0" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019b0911-8ba3-7199-ad42-bd370ee92e6f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b0911-8ba3-7199-ad42-bd370ee92e6f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b0911-8ba3-7199-ad42-bd370ee92e6f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b0911-8ba3-7199-ad42-bd370ee92e6f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b0911-8ba3-7264-809d-6b86f6cc09c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b0911-8ba3-7199-ad42-bd370ee92e6f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b0911-8ba3-7264-809d-6b86f6cc09c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019b0911-8ba3-7ec4-a322-8de4a4e1dae8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b0911-8ba3-7264-809d-6b86f6cc09c1" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019b0911-8ba3-7ec4-a322-8de4a4e1dae8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_TermLoanFacilityMember_019b0911-8ba3-715e-8711-b5af3c2bf2af" xlink:href="boom-20251231.xsd#boom_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b0911-8ba3-7264-809d-6b86f6cc09c1" xlink:to="loc_boom_TermLoanFacilityMember_019b0911-8ba3-715e-8711-b5af3c2bf2af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019b0911-8ba3-7beb-825c-a06fe6ca170c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b0911-8ba3-7259-97d8-5374c513c693" xlink:to="loc_us-gaap_LineOfCredit_019b0911-8ba3-7beb-825c-a06fe6ca170c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_019b0911-8ba3-7c5e-9a48-6b77ed606c14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b0911-8ba3-7259-97d8-5374c513c693" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_019b0911-8ba3-7c5e-9a48-6b77ed606c14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019b0911-8ba3-76a1-b6ce-86994c9ce28d" 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_DebtInstrumentLineItems_019b0911-8ba3-7259-97d8-5374c513c693" xlink:to="loc_us-gaap_LongTermDebt_019b0911-8ba3-76a1-b6ce-86994c9ce28d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019b0911-8ba3-7f5b-8be3-527c682e231d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b0911-8ba3-7259-97d8-5374c513c693" xlink:to="loc_us-gaap_LongTermDebtCurrent_019b0911-8ba3-7f5b-8be3-527c682e231d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019b0911-8ba3-7725-a252-4626e4d3749b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b0911-8ba3-7259-97d8-5374c513c693" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019b0911-8ba3-7725-a252-4626e4d3749b" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/DEBTNarrativeDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#DEBTNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/DEBTNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019b090b-6193-7959-b0e4-745b4847dc4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:to="loc_us-gaap_CreditFacilityAxis_019b090b-6193-7959-b0e4-745b4847dc4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019b090b-6193-7959-b0e4-745b4847dc4d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019b090b-6193-7959-b0e4-745b4847dc4d" xlink:to="loc_us-gaap_CreditFacilityDomain_019b090b-6193-7959-b0e4-745b4847dc4d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019b090b-6193-7cce-9032-0719514bf1a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019b090b-6193-7959-b0e4-745b4847dc4d" xlink:to="loc_us-gaap_CreditFacilityDomain_019b090b-6193-7cce-9032-0719514bf1a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019b090b-6193-7b01-a5b2-d2b8ca8a6adc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019b090b-6193-7cce-9032-0719514bf1a3" xlink:to="loc_us-gaap_LineOfCreditMember_019b090b-6193-7b01-a5b2-d2b8ca8a6adc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019b090b-6193-7fc8-aaae-420e7b5a9e23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019b090b-6193-7cce-9032-0719514bf1a3" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019b090b-6193-7fc8-aaae-420e7b5a9e23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_TermLoanFacilityMember_019b090b-6193-7128-89d9-c6b849c3cee6" xlink:href="boom-20251231.xsd#boom_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019b090b-6193-7cce-9032-0719514bf1a3" xlink:to="loc_boom_TermLoanFacilityMember_019b090b-6193-7128-89d9-c6b849c3cee6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DelayedDrawTermLoanFacilityMember_019b090b-6193-774f-ba7b-ac518e7619ea" xlink:href="boom-20251231.xsd#boom_DelayedDrawTermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019b090b-6193-7cce-9032-0719514bf1a3" xlink:to="loc_boom_DelayedDrawTermLoanFacilityMember_019b090b-6193-774f-ba7b-ac518e7619ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b090b-6193-7b20-a2ba-0bbf5fd4dd64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b090b-6193-7b20-a2ba-0bbf5fd4dd64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b090b-6193-7b20-a2ba-0bbf5fd4dd64_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b090b-6193-7b20-a2ba-0bbf5fd4dd64" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b090b-6193-7b20-a2ba-0bbf5fd4dd64_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b090b-6193-79c9-b47d-6089eedff5de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b090b-6193-7b20-a2ba-0bbf5fd4dd64" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b090b-6193-79c9-b47d-6089eedff5de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_CreditAgreementFacilityMember_019b090b-6193-72c3-ae4c-a18b9121224e" xlink:href="boom-20251231.xsd#boom_CreditAgreementFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b090b-6193-79c9-b47d-6089eedff5de" xlink:to="loc_boom_CreditAgreementFacilityMember_019b090b-6193-72c3-ae4c-a18b9121224e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_EuropeanLineOfCreditMember_019b090b-8c2f-7fe2-8945-fb848a3564c0" xlink:href="boom-20251231.xsd#boom_EuropeanLineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b090b-6193-79c9-b47d-6089eedff5de" xlink:to="loc_boom_EuropeanLineOfCreditMember_019b090b-8c2f-7fe2-8945-fb848a3564c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtInstrumentAmortizationPeriodAxis_019b090b-6193-7610-8061-a7650266700d" xlink:href="boom-20251231.xsd#boom_DebtInstrumentAmortizationPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:to="loc_boom_DebtInstrumentAmortizationPeriodAxis_019b090b-6193-7610-8061-a7650266700d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtInstrumentAmortizationPeriodDomain_019b090b-6193-7610-8061-a7650266700d_default" xlink:href="boom-20251231.xsd#boom_DebtInstrumentAmortizationPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_boom_DebtInstrumentAmortizationPeriodAxis_019b090b-6193-7610-8061-a7650266700d" xlink:to="loc_boom_DebtInstrumentAmortizationPeriodDomain_019b090b-6193-7610-8061-a7650266700d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtInstrumentAmortizationPeriodDomain_019b090b-6193-7818-bbc7-a7d7189e89e4" xlink:href="boom-20251231.xsd#boom_DebtInstrumentAmortizationPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_boom_DebtInstrumentAmortizationPeriodAxis_019b090b-6193-7610-8061-a7650266700d" xlink:to="loc_boom_DebtInstrumentAmortizationPeriodDomain_019b090b-6193-7818-bbc7-a7d7189e89e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtAmortizationPeriodOneMember_019b090b-6193-7989-b4d5-4b4ab2eb1e5d" xlink:href="boom-20251231.xsd#boom_DebtAmortizationPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_DebtInstrumentAmortizationPeriodDomain_019b090b-6193-7818-bbc7-a7d7189e89e4" xlink:to="loc_boom_DebtAmortizationPeriodOneMember_019b090b-6193-7989-b4d5-4b4ab2eb1e5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtAmortizationPeriodTwoMember_019b090b-6193-7549-a264-a04d472a22ec" xlink:href="boom-20251231.xsd#boom_DebtAmortizationPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_DebtInstrumentAmortizationPeriodDomain_019b090b-6193-7818-bbc7-a7d7189e89e4" xlink:to="loc_boom_DebtAmortizationPeriodTwoMember_019b090b-6193-7549-a264-a04d472a22ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtAmortizationPeriodThreeMember_019b090b-6193-74b5-b085-35074e2922eb" xlink:href="boom-20251231.xsd#boom_DebtAmortizationPeriodThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_DebtInstrumentAmortizationPeriodDomain_019b090b-6193-7818-bbc7-a7d7189e89e4" xlink:to="loc_boom_DebtAmortizationPeriodThreeMember_019b090b-6193-74b5-b085-35074e2922eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019b090b-6193-758e-9b45-04d912c794d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019b090b-6193-758e-9b45-04d912c794d6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b090b-6193-758e-9b45-04d912c794d6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b090b-6193-758e-9b45-04d912c794d6" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b090b-6193-758e-9b45-04d912c794d6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b090b-6193-7194-9d1c-87b3c9a7bfa4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b090b-6193-758e-9b45-04d912c794d6" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b090b-6193-7194-9d1c-87b3c9a7bfa4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019b090b-6193-7831-8892-76e3ee08bf45" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b090b-6193-7194-9d1c-87b3c9a7bfa4" xlink:to="loc_us-gaap_SecuredDebtMember_019b090b-6193-7831-8892-76e3ee08bf45" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019b090b-6193-7eb3-9785-d1921defbc93" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:to="loc_srt_RangeAxis_019b090b-6193-7eb3-9785-d1921defbc93" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019b090b-6193-7eb3-9785-d1921defbc93_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_019b090b-6193-7eb3-9785-d1921defbc93" xlink:to="loc_srt_RangeMember_019b090b-6193-7eb3-9785-d1921defbc93_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019b090b-6193-7ce3-97b9-d560b2be5fdc" 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_019b090b-6193-7eb3-9785-d1921defbc93" xlink:to="loc_srt_RangeMember_019b090b-6193-7ce3-97b9-d560b2be5fdc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019b090b-6193-7f28-b58d-3a6dd8fa00f6" 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_019b090b-6193-7ce3-97b9-d560b2be5fdc" xlink:to="loc_srt_MinimumMember_019b090b-6193-7f28-b58d-3a6dd8fa00f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019b090b-6193-7897-8a79-cf5caad95590" 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_019b090b-6193-7ce3-97b9-d560b2be5fdc" xlink:to="loc_srt_MaximumMember_019b090b-6193-7897-8a79-cf5caad95590" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019b090b-6193-7a87-8105-d4e5394ea8ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:to="loc_us-gaap_VariableRateAxis_019b090b-6193-7a87-8105-d4e5394ea8ea" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019b090b-6193-7a87-8105-d4e5394ea8ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019b090b-6193-7a87-8105-d4e5394ea8ea" xlink:to="loc_us-gaap_VariableRateDomain_019b090b-6193-7a87-8105-d4e5394ea8ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019b090b-6193-7bc5-9001-c8cad3cb1cbe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019b090b-6193-7a87-8105-d4e5394ea8ea" xlink:to="loc_us-gaap_VariableRateDomain_019b090b-6193-7bc5-9001-c8cad3cb1cbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019b090b-6193-7ae7-8938-883fba1e4f97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019b090b-6193-7bc5-9001-c8cad3cb1cbe" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019b090b-6193-7ae7-8938-883fba1e4f97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_019b090b-6193-74f3-9664-f99de7fcd6dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019b090b-6193-7bc5-9001-c8cad3cb1cbe" xlink:to="loc_us-gaap_BaseRateMember_019b090b-6193-74f3-9664-f99de7fcd6dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EurodollarMember_019b090b-8c2f-746a-8222-d241c2bacdcc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EurodollarMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019b090b-6193-7bc5-9001-c8cad3cb1cbe" xlink:to="loc_us-gaap_EurodollarMember_019b090b-8c2f-746a-8222-d241c2bacdcc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtCovenantPeriodAxis_019b090b-6193-7db4-82f8-4879d1f460ae" xlink:href="boom-20251231.xsd#boom_DebtCovenantPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:to="loc_boom_DebtCovenantPeriodAxis_019b090b-6193-7db4-82f8-4879d1f460ae" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtCovenantPeriodDomain_019b090b-6193-7db4-82f8-4879d1f460ae_default" xlink:href="boom-20251231.xsd#boom_DebtCovenantPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_boom_DebtCovenantPeriodAxis_019b090b-6193-7db4-82f8-4879d1f460ae" xlink:to="loc_boom_DebtCovenantPeriodDomain_019b090b-6193-7db4-82f8-4879d1f460ae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtCovenantPeriodDomain_019b090b-6193-7e5c-b3c5-f46fa710c524" xlink:href="boom-20251231.xsd#boom_DebtCovenantPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_boom_DebtCovenantPeriodAxis_019b090b-6193-7db4-82f8-4879d1f460ae" xlink:to="loc_boom_DebtCovenantPeriodDomain_019b090b-6193-7e5c-b3c5-f46fa710c524" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_QuarterEndedSeptember302025Member_019c76c4-72df-74f6-b9f3-aa5c31a038ce" xlink:href="boom-20251231.xsd#boom_QuarterEndedSeptember302025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_DebtCovenantPeriodDomain_019b090b-6193-7e5c-b3c5-f46fa710c524" xlink:to="loc_boom_QuarterEndedSeptember302025Member_019c76c4-72df-74f6-b9f3-aa5c31a038ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_QuarterEndedDecember312025AndThereafterMember_019c76c5-a4cf-768b-9a49-e30dfdeb096b" xlink:href="boom-20251231.xsd#boom_QuarterEndedDecember312025AndThereafterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_DebtCovenantPeriodDomain_019b090b-6193-7e5c-b3c5-f46fa710c524" xlink:to="loc_boom_QuarterEndedDecember312025AndThereafterMember_019c76c5-a4cf-768b-9a49-e30dfdeb096b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019b090b-8c2f-782d-8221-cf993667f643" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_acf25f61-66e1-41fc-a992-ab1340440abd" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019b090b-8c2f-782d-8221-cf993667f643" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b090b-8c2f-782d-8221-cf993667f643_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b090b-8c2f-782d-8221-cf993667f643" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b090b-8c2f-782d-8221-cf993667f643_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b090b-8c2f-7da2-ba9b-531118d70a29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019b090b-8c2f-782d-8221-cf993667f643" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b090b-8c2f-7da2-ba9b-531118d70a29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsLLCMember_019b090b-8c2f-7235-b962-753ffd4a29ba" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019b090b-8c2f-7da2-ba9b-531118d70a29" xlink:to="loc_boom_ArcadiaProductsLLCMember_019b090b-8c2f-7235-b962-753ffd4a29ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019b090b-6193-7f5a-b2f9-df23fc552c7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019b090b-6193-7f5a-b2f9-df23fc552c7a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_019b090b-6193-7594-9749-8df5d6c63a76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_019b090b-6193-7594-9749-8df5d6c63a76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019b090b-6193-7ac7-a91f-cd453e5fc7ae" xlink:href="boom-20251231.xsd#boom_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_boom_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019b090b-6193-7ac7-a91f-cd453e5fc7ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_LineOfCreditFacilityAmountOfBankGuaranteesSecured_019b090b-6193-7ae3-bb76-5da868daff6f" xlink:href="boom-20251231.xsd#boom_LineOfCreditFacilityAmountOfBankGuaranteesSecured"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_boom_LineOfCreditFacilityAmountOfBankGuaranteesSecured_019b090b-6193-7ae3-bb76-5da868daff6f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019b090b-6193-7700-81aa-545e78fe563d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019b090b-6193-7700-81aa-545e78fe563d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_BusinessAcquisitionPercentageOfVotingInterestsToBeAcquired_019b090b-8c2f-7279-87f8-a69ec4d7ecb2" xlink:href="boom-20251231.xsd#boom_BusinessAcquisitionPercentageOfVotingInterestsToBeAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_boom_BusinessAcquisitionPercentageOfVotingInterestsToBeAcquired_019b090b-8c2f-7279-87f8-a69ec4d7ecb2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCovenantCompliance_019c71c6-768a-7c31-87e8-26ec715fb985" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCovenantCompliance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_us-gaap_DebtInstrumentCovenantCompliance_019c71c6-768a-7c31-87e8-26ec715fb985" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019b090b-8c2f-76ad-b609-76a2e6fac100" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_us-gaap_LineOfCredit_019b090b-8c2f-76ad-b609-76a2e6fac100" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_019b090b-8c2f-7344-bb98-a7450f33495d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_019b090b-8c2f-7344-bb98-a7450f33495d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_LineOfCreditFacilityCovenantLeverageRatioMaximum_019c76bc-264d-7bb8-a0ec-b6ddf433bdaf" xlink:href="boom-20251231.xsd#boom_LineOfCreditFacilityCovenantLeverageRatioMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_boom_LineOfCreditFacilityCovenantLeverageRatioMaximum_019c76bc-264d-7bb8-a0ec-b6ddf433bdaf" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DebtInstrumentCovenantMinimumDebtServiceCoverageRatio_019c76c0-6024-7a77-92fb-df8897916f48" xlink:href="boom-20251231.xsd#boom_DebtInstrumentCovenantMinimumDebtServiceCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_boom_DebtInstrumentCovenantMinimumDebtServiceCoverageRatio_019c76c0-6024-7a77-92fb-df8897916f48" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_LineOfCreditFacilityCovenantLeverageRatioTrailingPeriod_019c76c2-ab38-7582-96ff-826c3e715ba4" xlink:href="boom-20251231.xsd#boom_LineOfCreditFacilityCovenantLeverageRatioTrailingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b090b-6193-7a6f-8e6e-e8f5574b300b" xlink:to="loc_boom_LineOfCreditFacilityCovenantLeverageRatioTrailingPeriod_019c76c2-ab38-7582-96ff-826c3e715ba4" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSScheduleofStockBasedCompensationDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSScheduleofStockBasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSScheduleofStockBasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ea11590f-8d73-4313-9ec6-6c0c56b4dc1f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_0e18ba37-8862-4ce4-b018-48401138e070" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ea11590f-8d73-4313-9ec6-6c0c56b4dc1f" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_0e18ba37-8862-4ce4-b018-48401138e070" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_a7841857-75a4-4bab-b4da-32c430db1a11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_0e18ba37-8862-4ce4-b018-48401138e070" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_a7841857-75a4-4bab-b4da-32c430db1a11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_a7841857-75a4-4bab-b4da-32c430db1a11_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_a7841857-75a4-4bab-b4da-32c430db1a11" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_a7841857-75a4-4bab-b4da-32c430db1a11_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_096368ac-24bd-4bba-84f3-f047e5ab49dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_a7841857-75a4-4bab-b4da-32c430db1a11" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_096368ac-24bd-4bba-84f3-f047e5ab49dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_6e041b25-f281-4441-a2d5-a866d698ed00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_096368ac-24bd-4bba-84f3-f047e5ab49dc" xlink:to="loc_us-gaap_CostOfSalesMember_6e041b25-f281-4441-a2d5-a866d698ed00" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_3980e6a8-1b79-4357-965d-4933a00c1c67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_096368ac-24bd-4bba-84f3-f047e5ab49dc" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_3980e6a8-1b79-4357-965d-4933a00c1c67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_SellingAndDistributionExpenseMember_085ae17b-8674-4b2c-8f81-0e4b2d7647f1" xlink:href="boom-20251231.xsd#boom_SellingAndDistributionExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_096368ac-24bd-4bba-84f3-f047e5ab49dc" xlink:to="loc_boom_SellingAndDistributionExpenseMember_085ae17b-8674-4b2c-8f81-0e4b2d7647f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_StrategicReviewAndRelatedExpensesMember_476ff2bd-eb04-4d3b-906c-41b8e50f453c" xlink:href="boom-20251231.xsd#boom_StrategicReviewAndRelatedExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_096368ac-24bd-4bba-84f3-f047e5ab49dc" xlink:to="loc_boom_StrategicReviewAndRelatedExpensesMember_476ff2bd-eb04-4d3b-906c-41b8e50f453c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RestructuringSettlementAndImpairmentProvisionsMember_f90123aa-fba0-417a-8b24-6d6815dfbd58" xlink:href="boom-20251231.xsd#boom_RestructuringSettlementAndImpairmentProvisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_096368ac-24bd-4bba-84f3-f047e5ab49dc" xlink:to="loc_boom_RestructuringSettlementAndImpairmentProvisionsMember_f90123aa-fba0-417a-8b24-6d6815dfbd58" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_bfc075ee-4e74-424c-a4af-e100454ad15b" 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_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ea11590f-8d73-4313-9ec6-6c0c56b4dc1f" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_bfc075ee-4e74-424c-a4af-e100454ad15b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_7a0e4986-a363-431d-a301-4a1f85f14778" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ea11590f-8d73-4313-9ec6-6c0c56b4dc1f" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_7a0e4986-a363-431d-a301-4a1f85f14778" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_29f3ea1f-681f-41fd-8da3-6f85abd2dc90" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ea11590f-8d73-4313-9ec6-6c0c56b4dc1f" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_29f3ea1f-681f-41fd-8da3-6f85abd2dc90" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_SharebasedCompensationEffectonEarningsPerShareBasicAbstract_80951021-a7f0-4f70-973d-65bc04d6855c" xlink:href="boom-20251231.xsd#boom_SharebasedCompensationEffectonEarningsPerShareBasicAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_ea11590f-8d73-4313-9ec6-6c0c56b4dc1f" xlink:to="loc_boom_SharebasedCompensationEffectonEarningsPerShareBasicAbstract_80951021-a7f0-4f70-973d-65bc04d6855c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ShareBasedCompensationEffectOnEarningsPerShareBasic_1d655a6e-460e-41dc-b4a6-c0eb9e0e11bb" xlink:href="boom-20251231.xsd#boom_ShareBasedCompensationEffectOnEarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_SharebasedCompensationEffectonEarningsPerShareBasicAbstract_80951021-a7f0-4f70-973d-65bc04d6855c" xlink:to="loc_boom_ShareBasedCompensationEffectOnEarningsPerShareBasic_1d655a6e-460e-41dc-b4a6-c0eb9e0e11bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ShareBasedCompensationEffectOnEarningsPerShareDiluted_a8300dba-1083-4924-a530-36965eec0150" xlink:href="boom-20251231.xsd#boom_ShareBasedCompensationEffectOnEarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_SharebasedCompensationEffectonEarningsPerShareBasicAbstract_80951021-a7f0-4f70-973d-65bc04d6855c" xlink:to="loc_boom_ShareBasedCompensationEffectOnEarningsPerShareDiluted_a8300dba-1083-4924-a530-36965eec0150" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSNarrativeDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" 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_13d44668-fd9a-4ea1-b1d4-afe9296211b3" 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_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_13d44668-fd9a-4ea1-b1d4-afe9296211b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c3371-f624-7815-87d3-d3a064bf193e" 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_13d44668-fd9a-4ea1-b1d4-afe9296211b3" xlink:to="loc_us-gaap_AwardTypeAxis_019c3371-f624-7815-87d3-d3a064bf193e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c3371-f624-7815-87d3-d3a064bf193e_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_019c3371-f624-7815-87d3-d3a064bf193e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c3371-f624-7815-87d3-d3a064bf193e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c3371-f624-719f-837d-e32f8e377da8" 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_019c3371-f624-7815-87d3-d3a064bf193e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c3371-f624-719f-837d-e32f8e377da8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_PreviouslyGrantedUnvestedAwardsUnder2016PlanMember_019c33a7-8acb-7786-86a2-373f6fd1cd91" xlink:href="boom-20251231.xsd#boom_PreviouslyGrantedUnvestedAwardsUnder2016PlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c3371-f624-719f-837d-e32f8e377da8" xlink:to="loc_boom_PreviouslyGrantedUnvestedAwardsUnder2016PlanMember_019c33a7-8acb-7786-86a2-373f6fd1cd91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c3371-f624-7a3d-ae2a-8c9c20847719" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c3371-f624-719f-837d-e32f8e377da8" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c3371-f624-7a3d-ae2a-8c9c20847719" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RestrictedStockUnitsRSUsCashSettledMember_019c3406-9a8f-7299-b6f9-6b6f62df661a" xlink:href="boom-20251231.xsd#boom_RestrictedStockUnitsRSUsCashSettledMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c3371-f624-719f-837d-e32f8e377da8" xlink:to="loc_boom_RestrictedStockUnitsRSUsCashSettledMember_019c3406-9a8f-7299-b6f9-6b6f62df661a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_019c3372-1630-7c9a-a536-e75e3d8cb42c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c3371-f624-719f-837d-e32f8e377da8" xlink:to="loc_us-gaap_PerformanceSharesMember_019c3372-1630-7c9a-a536-e75e3d8cb42c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c3372-1630-73e6-9c7c-5ef9a566e48e" 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_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_13d44668-fd9a-4ea1-b1d4-afe9296211b3" xlink:to="loc_srt_RangeAxis_019c3372-1630-73e6-9c7c-5ef9a566e48e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c3372-1630-73e6-9c7c-5ef9a566e48e_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_019c3372-1630-73e6-9c7c-5ef9a566e48e" xlink:to="loc_srt_RangeMember_019c3372-1630-73e6-9c7c-5ef9a566e48e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c3372-1630-717b-9b8a-739477be4929" 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_019c3372-1630-73e6-9c7c-5ef9a566e48e" xlink:to="loc_srt_RangeMember_019c3372-1630-717b-9b8a-739477be4929" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c3372-1630-7005-9956-3b14a350118a" 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_019c3372-1630-717b-9b8a-739477be4929" xlink:to="loc_srt_MinimumMember_019c3372-1630-7005-9956-3b14a350118a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c3372-1630-7cf9-ab80-2711e145ee77" 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_019c3372-1630-717b-9b8a-739477be4929" xlink:to="loc_srt_MaximumMember_019c3372-1630-7cf9-ab80-2711e145ee77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019c3372-1630-71dc-a706-ea188337e7e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_13d44668-fd9a-4ea1-b1d4-afe9296211b3" xlink:to="loc_us-gaap_PlanNameAxis_019c3372-1630-71dc-a706-ea188337e7e0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c3372-1630-71dc-a706-ea188337e7e0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019c3372-1630-71dc-a706-ea188337e7e0" xlink:to="loc_us-gaap_PlanNameDomain_019c3372-1630-71dc-a706-ea188337e7e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c3372-1630-73e5-a76c-7e014c75381a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019c3372-1630-71dc-a706-ea188337e7e0" xlink:to="loc_us-gaap_PlanNameDomain_019c3372-1630-73e5-a76c-7e014c75381a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_PSUsGrantedPriorTo2024Member_019c3372-1630-7e57-be5c-030fc37683aa" xlink:href="boom-20251231.xsd#boom_PSUsGrantedPriorTo2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c3372-1630-73e5-a76c-7e014c75381a" xlink:to="loc_boom_PSUsGrantedPriorTo2024Member_019c3372-1630-7e57-be5c-030fc37683aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_PSUsGrantedIn2025Member_019c3372-1630-7cd1-a530-479c5a6b5075" xlink:href="boom-20251231.xsd#boom_PSUsGrantedIn2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c3372-1630-73e5-a76c-7e014c75381a" xlink:to="loc_boom_PSUsGrantedIn2025Member_019c3372-1630-7cd1-a530-479c5a6b5075" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019c3372-1630-7c4f-b651-24b4aeb02f65" 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_13d44668-fd9a-4ea1-b1d4-afe9296211b3" xlink:to="loc_us-gaap_VestingAxis_019c3372-1630-7c4f-b651-24b4aeb02f65" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c3372-1630-7c4f-b651-24b4aeb02f65_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_019c3372-1630-7c4f-b651-24b4aeb02f65" xlink:to="loc_us-gaap_VestingDomain_019c3372-1630-7c4f-b651-24b4aeb02f65_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c3372-1630-7bb4-aa6e-9270d63996fd" 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_019c3372-1630-7c4f-b651-24b4aeb02f65" xlink:to="loc_us-gaap_VestingDomain_019c3372-1630-7bb4-aa6e-9270d63996fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_AchievementOfRelativeTSRPerformanceMember_019c3372-1630-7cf1-98f8-0c20c6b80313" xlink:href="boom-20251231.xsd#boom_AchievementOfRelativeTSRPerformanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c3372-1630-7bb4-aa6e-9270d63996fd" xlink:to="loc_boom_AchievementOfRelativeTSRPerformanceMember_019c3372-1630-7cf1-98f8-0c20c6b80313" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_AchievementOfTargetedAdjustedEBITDAMember_019c3372-1630-7a49-bb77-8924b74756f5" xlink:href="boom-20251231.xsd#boom_AchievementOfTargetedAdjustedEBITDAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c3372-1630-7bb4-aa6e-9270d63996fd" xlink:to="loc_boom_AchievementOfTargetedAdjustedEBITDAMember_019c3372-1630-7a49-bb77-8924b74756f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_CumulativeAdjustedEBITDAMember_019c3372-1630-7a03-916b-2105cb7b6722" xlink:href="boom-20251231.xsd#boom_CumulativeAdjustedEBITDAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c3372-1630-7bb4-aa6e-9270d63996fd" xlink:to="loc_boom_CumulativeAdjustedEBITDAMember_019c3372-1630-7a03-916b-2105cb7b6722" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_CumulativeAdjustedFreeCashFlowMember_019c3372-1630-7877-834d-711efb25a7ee" xlink:href="boom-20251231.xsd#boom_CumulativeAdjustedFreeCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c3372-1630-7bb4-aa6e-9270d63996fd" xlink:to="loc_boom_CumulativeAdjustedFreeCashFlowMember_019c3372-1630-7877-834d-711efb25a7ee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019c33a7-8acc-7993-ba39-e30309111fb1" 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_019c3372-1630-7bb4-aa6e-9270d63996fd" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019c33a7-8acc-7993-ba39-e30309111fb1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019c33a7-8acc-7fc4-a9c6-6be0927e5294" 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_019c3372-1630-7bb4-aa6e-9270d63996fd" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019c33a7-8acc-7fc4-a9c6-6be0927e5294" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_019c33a7-8acc-7df8-9f6e-b72bb9d69c63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c3372-1630-7bb4-aa6e-9270d63996fd" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_019c33a7-8acc-7df8-9f6e-b72bb9d69c63" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusAxis_019c3372-1630-7507-97b9-fe924fc97de6" 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_13d44668-fd9a-4ea1-b1d4-afe9296211b3" xlink:to="loc_us-gaap_GranteeStatusAxis_019c3372-1630-7507-97b9-fe924fc97de6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_019c3372-1630-7507-97b9-fe924fc97de6_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_019c3372-1630-7507-97b9-fe924fc97de6" xlink:to="loc_us-gaap_GranteeStatusDomain_019c3372-1630-7507-97b9-fe924fc97de6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GranteeStatusDomain_019c3372-1630-7fa6-9241-2246d7446b98" 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_019c3372-1630-7507-97b9-fe924fc97de6" xlink:to="loc_us-gaap_GranteeStatusDomain_019c3372-1630-7fa6-9241-2246d7446b98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ShareBasedPaymentArrangementEmployeeOfArcadiaProductsMember_019c3372-1630-7920-ad5e-ab84d992928d" xlink:href="boom-20251231.xsd#boom_ShareBasedPaymentArrangementEmployeeOfArcadiaProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_019c3372-1630-7fa6-9241-2246d7446b98" xlink:to="loc_boom_ShareBasedPaymentArrangementEmployeeOfArcadiaProductsMember_019c3372-1630-7920-ad5e-ab84d992928d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ShareBasedPaymentArrangementEmployeeOfDMCDynaEnergeticsAndNobelCladMember_019c3372-1630-7aa2-9832-c91dbd60eb0a" xlink:href="boom-20251231.xsd#boom_ShareBasedPaymentArrangementEmployeeOfDMCDynaEnergeticsAndNobelCladMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GranteeStatusDomain_019c3372-1630-7fa6-9241-2246d7446b98" xlink:to="loc_boom_ShareBasedPaymentArrangementEmployeeOfDMCDynaEnergeticsAndNobelCladMember_019c3372-1630-7aa2-9832-c91dbd60eb0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_019c3372-48cd-774a-98d3-4ffe915a1f23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_13d44668-fd9a-4ea1-b1d4-afe9296211b3" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_019c3372-48cd-774a-98d3-4ffe915a1f23" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019c3372-48cd-774a-98d3-4ffe915a1f23_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019c3372-48cd-774a-98d3-4ffe915a1f23" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019c3372-48cd-774a-98d3-4ffe915a1f23_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_019c3372-48cd-79e8-b3f6-5b80f8af02a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_019c3372-48cd-774a-98d3-4ffe915a1f23" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_019c3372-48cd-79e8-b3f6-5b80f8af02a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_A2024RightsMember_019c3372-48cd-7ed1-9505-628a48f315a8" xlink:href="boom-20251231.xsd#boom_A2024RightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_019c3372-48cd-79e8-b3f6-5b80f8af02a2" xlink:to="loc_boom_A2024RightsMember_019c3372-48cd-7ed1-9505-628a48f315a8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c3372-48cd-74bb-ae2a-6f4443b87939" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_13d44668-fd9a-4ea1-b1d4-afe9296211b3" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c3372-48cd-74bb-ae2a-6f4443b87939" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c3372-48cd-74bb-ae2a-6f4443b87939_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c3372-48cd-74bb-ae2a-6f4443b87939" xlink:to="loc_us-gaap_ClassOfStockDomain_019c3372-48cd-74bb-ae2a-6f4443b87939_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c3372-48cd-7533-aeca-f92a7737b66f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c3372-48cd-74bb-ae2a-6f4443b87939" xlink:to="loc_us-gaap_ClassOfStockDomain_019c3372-48cd-7533-aeca-f92a7737b66f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesBPreferredStockMember_019c3372-48cd-7536-9c63-af9811af9055" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeriesBPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c3372-48cd-7533-aeca-f92a7737b66f" xlink:to="loc_us-gaap_SeriesBPreferredStockMember_019c3372-48cd-7536-9c63-af9811af9055" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019c3371-f624-7539-8fdd-b38f4ffedf52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019c3371-f624-7539-8fdd-b38f4ffedf52" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c3371-f624-7aa3-8251-c25ae8aa6e08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c3371-f624-7aa3-8251-c25ae8aa6e08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019c3371-f624-7ad4-b286-dc0a0d3924f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019c3371-f624-7ad4-b286-dc0a0d3924f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsCommonStockConversionRatio_019c3371-f624-7dde-9f13-093f66c8194a" xlink:href="boom-20251231.xsd#boom_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsCommonStockConversionRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_boom_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsCommonStockConversionRatio_019c3371-f624-7dde-9f13-093f66c8194a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c67fc-9c5e-7fca-80ba-def8f6b13e36" 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_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c67fc-9c5e-7fca-80ba-def8f6b13e36" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ShareBasedCompensationByShareBasedPaymentAwardCommonStockEarnedAsAPercentageOfTargetedPerformanceStockUnits_019c3372-1630-7212-8f47-b8340cee4068" xlink:href="boom-20251231.xsd#boom_ShareBasedCompensationByShareBasedPaymentAwardCommonStockEarnedAsAPercentageOfTargetedPerformanceStockUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_boom_ShareBasedCompensationByShareBasedPaymentAwardCommonStockEarnedAsAPercentageOfTargetedPerformanceStockUnits_019c3372-1630-7212-8f47-b8340cee4068" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c3372-1630-7627-a023-bb7be5cf92ad" 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_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c3372-1630-7627-a023-bb7be5cf92ad" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_019c3372-48cd-7854-a652-e49c29a2e1a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_019c3372-48cd-7854-a652-e49c29a2e1a9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_019c3372-48cd-72af-bb04-1172cfde4c03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_019c3372-48cd-72af-bb04-1172cfde4c03" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ClassOfWarrantOrRightThresholdPercentageMinimum_019c3372-48cd-7b93-8e29-84cd1618cbd9" xlink:href="boom-20251231.xsd#boom_ClassOfWarrantOrRightThresholdPercentageMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_boom_ClassOfWarrantOrRightThresholdPercentageMinimum_019c3372-48cd-7b93-8e29-84cd1618cbd9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ClassOfWarrantOrRightThresholdPercentageMaximum_019c3372-48cd-7237-be8f-add24b358360" xlink:href="boom-20251231.xsd#boom_ClassOfWarrantOrRightThresholdPercentageMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c3371-f624-73fc-a7ff-181c5cac884e" xlink:to="loc_boom_ClassOfWarrantOrRightThresholdPercentageMaximum_019c3372-48cd-7237-be8f-add24b358360" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSActivityofNonvestedSharesofRestrictedStockandRestrictedStockUnitsDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSActivityofNonvestedSharesofRestrictedStockandRestrictedStockUnitsDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSActivityofNonvestedSharesofRestrictedStockandRestrictedStockUnitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ef46850a-c9d0-49e4-871b-9d72ce68b9c3" 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_7dfb16e4-8342-4354-9ca2-aab8706fff73" 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_ef46850a-c9d0-49e4-871b-9d72ce68b9c3" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7dfb16e4-8342-4354-9ca2-aab8706fff73" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_aafdbcdf-8424-4373-a332-c15d5433f587" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7dfb16e4-8342-4354-9ca2-aab8706fff73" xlink:to="loc_us-gaap_PlanNameAxis_aafdbcdf-8424-4373-a332-c15d5433f587" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_aafdbcdf-8424-4373-a332-c15d5433f587_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_aafdbcdf-8424-4373-a332-c15d5433f587" xlink:to="loc_us-gaap_PlanNameDomain_aafdbcdf-8424-4373-a332-c15d5433f587_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_86ef47d0-8f16-4f81-973e-62bdea7d373a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_aafdbcdf-8424-4373-a332-c15d5433f587" xlink:to="loc_us-gaap_PlanNameDomain_86ef47d0-8f16-4f81-973e-62bdea7d373a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_A2016OmnibusIncentivePlanMember_debfbc45-3657-490a-85db-01c776fe8985" xlink:href="boom-20251231.xsd#boom_A2016OmnibusIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_86ef47d0-8f16-4f81-973e-62bdea7d373a" xlink:to="loc_boom_A2016OmnibusIncentivePlanMember_debfbc45-3657-490a-85db-01c776fe8985" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_A2025OmnibusIncentivePlanMember_3c297841-03c7-4f53-b75d-6af41c3443a1" xlink:href="boom-20251231.xsd#boom_A2025OmnibusIncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_86ef47d0-8f16-4f81-973e-62bdea7d373a" xlink:to="loc_boom_A2025OmnibusIncentivePlanMember_3c297841-03c7-4f53-b75d-6af41c3443a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_323cb04c-ea33-41ac-8eb2-a3e05519f94f" 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_7dfb16e4-8342-4354-9ca2-aab8706fff73" xlink:to="loc_us-gaap_AwardTypeAxis_323cb04c-ea33-41ac-8eb2-a3e05519f94f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_323cb04c-ea33-41ac-8eb2-a3e05519f94f_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_323cb04c-ea33-41ac-8eb2-a3e05519f94f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_323cb04c-ea33-41ac-8eb2-a3e05519f94f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a7d8eca-8914-4bd2-89f4-5ccd55578a52" 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_323cb04c-ea33-41ac-8eb2-a3e05519f94f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a7d8eca-8914-4bd2-89f4-5ccd55578a52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_f86c3025-6a19-4b99-a4a8-cfac1ceab83b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a7d8eca-8914-4bd2-89f4-5ccd55578a52" xlink:to="loc_us-gaap_RestrictedStockMember_f86c3025-6a19-4b99-a4a8-cfac1ceab83b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_3b2f943f-6f33-4d2b-8f65-8f74c85a8006" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a7d8eca-8914-4bd2-89f4-5ccd55578a52" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_3b2f943f-6f33-4d2b-8f65-8f74c85a8006" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_bc29260b-6a27-4e99-a4e6-d19b7d4a5905" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a7d8eca-8914-4bd2-89f4-5ccd55578a52" xlink:to="loc_us-gaap_PerformanceSharesMember_bc29260b-6a27-4e99-a4e6-d19b7d4a5905" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_e267d3f2-79e7-4bbe-a914-9ee529672690" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ef46850a-c9d0-49e4-871b-9d72ce68b9c3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_e267d3f2-79e7-4bbe-a914-9ee529672690" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_a39e0248-7a33-48db-8ae8-5d0a2a719e81" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_e267d3f2-79e7-4bbe-a914-9ee529672690" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_a39e0248-7a33-48db-8ae8-5d0a2a719e81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_92ca1cd4-e3f6-494b-baa4-9b9898d4b7c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_e267d3f2-79e7-4bbe-a914-9ee529672690" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_92ca1cd4-e3f6-494b-baa4-9b9898d4b7c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_e9bae22f-28c5-4078-8879-1ac21603c08d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_e267d3f2-79e7-4bbe-a914-9ee529672690" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_e9bae22f-28c5-4078-8879-1ac21603c08d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2be93ae9-5d20-46c7-bf4c-7a26b87bea88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_e267d3f2-79e7-4bbe-a914-9ee529672690" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2be93ae9-5d20-46c7-bf4c-7a26b87bea88" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_2bba4be1-baeb-4cc4-8330-e136f33cc0a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1dcef70b-f95b-4e14-a1f6-ba55eb106919" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ef46850a-c9d0-49e4-871b-9d72ce68b9c3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1dcef70b-f95b-4e14-a1f6-ba55eb106919" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8cc1ec29-1583-4f1e-9103-a99f05e8a296" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1dcef70b-f95b-4e14-a1f6-ba55eb106919" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8cc1ec29-1583-4f1e-9103-a99f05e8a296" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_53ec0afe-9815-40f9-bcf3-90411d3b042f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1dcef70b-f95b-4e14-a1f6-ba55eb106919" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_53ec0afe-9815-40f9-bcf3-90411d3b042f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0adac985-029b-424f-9637-3f0d5812ac12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1dcef70b-f95b-4e14-a1f6-ba55eb106919" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_0adac985-029b-424f-9637-3f0d5812ac12" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_43e9ce24-46e0-4e9d-bf8c-c7d7927ff35f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1dcef70b-f95b-4e14-a1f6-ba55eb106919" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_43e9ce24-46e0-4e9d-bf8c-c7d7927ff35f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_69e63d75-e17a-458f-8ed9-a752653d933b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c336b-655d-70b5-9d99-c52fe28eb891" 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_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_1dcef70b-f95b-4e14-a1f6-ba55eb106919" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c336b-655d-70b5-9d99-c52fe28eb891" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSScheduleofTotalUnrecognizedStockBasedCompensationDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSScheduleofTotalUnrecognizedStockBasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/STOCKHOLDERSEQUITYANDEMPLOYEESTOCKPLANSScheduleofTotalUnrecognizedStockBasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6a9761d8-bb26-4eff-8c8f-7e8db32969ca" 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_ea2442bb-bf82-43a0-b965-ba5ce8fb1db5" 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_6a9761d8-bb26-4eff-8c8f-7e8db32969ca" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ea2442bb-bf82-43a0-b965-ba5ce8fb1db5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_247810b2-31c2-40af-b27f-e6aceb04884e" 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_ea2442bb-bf82-43a0-b965-ba5ce8fb1db5" xlink:to="loc_us-gaap_AwardTypeAxis_247810b2-31c2-40af-b27f-e6aceb04884e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_247810b2-31c2-40af-b27f-e6aceb04884e_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_247810b2-31c2-40af-b27f-e6aceb04884e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_247810b2-31c2-40af-b27f-e6aceb04884e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3e761a53-64ed-4676-bc78-15fe5a84e3a4" 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_247810b2-31c2-40af-b27f-e6aceb04884e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3e761a53-64ed-4676-bc78-15fe5a84e3a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_f350dba8-cd90-4d96-82cb-0bdb5f64b495" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3e761a53-64ed-4676-bc78-15fe5a84e3a4" xlink:to="loc_us-gaap_RestrictedStockMember_f350dba8-cd90-4d96-82cb-0bdb5f64b495" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_e87d7160-ccb5-4f20-8d8d-852f7a3160ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3e761a53-64ed-4676-bc78-15fe5a84e3a4" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_e87d7160-ccb5-4f20-8d8d-852f7a3160ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_c3824b47-098d-42cf-a56b-7128bb899bc2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_3e761a53-64ed-4676-bc78-15fe5a84e3a4" xlink:to="loc_us-gaap_PerformanceSharesMember_c3824b47-098d-42cf-a56b-7128bb899bc2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_88b3b082-0d45-49a6-9d97-a04aa0b2ba97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6a9761d8-bb26-4eff-8c8f-7e8db32969ca" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_88b3b082-0d45-49a6-9d97-a04aa0b2ba97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_9cc1ed6d-fdde-4762-bb4e-8cffcff79a9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6a9761d8-bb26-4eff-8c8f-7e8db32969ca" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_9cc1ed6d-fdde-4762-bb4e-8cffcff79a9a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/EMPLOYEEBENEFITPLANSNarrativeDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#EMPLOYEEBENEFITPLANSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/EMPLOYEEBENEFITPLANSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_da7ce17c-e2e0-49c9-bf91-5e1687817c18" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_da7ce17c-e2e0-49c9-bf91-5e1687817c18" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019c3370-eb0b-7944-abc2-e5ce80604f76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_da7ce17c-e2e0-49c9-bf91-5e1687817c18" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019c3370-eb0b-7944-abc2-e5ce80604f76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019c3370-eb0b-7944-abc2-e5ce80604f76_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019c3370-eb0b-7944-abc2-e5ce80604f76" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019c3370-eb0b-7944-abc2-e5ce80604f76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019c3370-eb0b-771c-b997-adff3a62ce00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019c3370-eb0b-7944-abc2-e5ce80604f76" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019c3370-eb0b-771c-b997-adff3a62ce00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PostemploymentRetirementBenefitsMember_019c3370-eb0b-7590-b9c4-735dd48a0494" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PostemploymentRetirementBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019c3370-eb0b-771c-b997-adff3a62ce00" xlink:to="loc_us-gaap_PostemploymentRetirementBenefitsMember_019c3370-eb0b-7590-b9c4-735dd48a0494" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019c3370-eb0b-7daf-b5a9-5d3f24fda42e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019c3370-eb0b-771c-b997-adff3a62ce00" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019c3370-eb0b-7daf-b5a9-5d3f24fda42e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c3370-eb0b-74ed-9a66-e7cff71d5428" 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_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_da7ce17c-e2e0-49c9-bf91-5e1687817c18" xlink:to="loc_srt_RangeAxis_019c3370-eb0b-74ed-9a66-e7cff71d5428" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c3370-eb0b-74ed-9a66-e7cff71d5428_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_019c3370-eb0b-74ed-9a66-e7cff71d5428" xlink:to="loc_srt_RangeMember_019c3370-eb0b-74ed-9a66-e7cff71d5428_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c3370-eb0b-7b49-8a05-9d8e49fe43ea" 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_019c3370-eb0b-74ed-9a66-e7cff71d5428" xlink:to="loc_srt_RangeMember_019c3370-eb0b-7b49-8a05-9d8e49fe43ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c3370-eb0b-7c32-9556-c34b86afc91f" 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_019c3370-eb0b-7b49-8a05-9d8e49fe43ea" xlink:to="loc_srt_MinimumMember_019c3370-eb0b-7c32-9556-c34b86afc91f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c3370-eb0b-72f2-a747-4bdb60c8471f" 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_019c3370-eb0b-7b49-8a05-9d8e49fe43ea" xlink:to="loc_srt_MaximumMember_019c3370-eb0b-72f2-a747-4bdb60c8471f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DefinedContributionPlanEmployerMatchLevelOne_019c3370-eb0b-79cb-8ced-a8b64f5b6c89" xlink:href="boom-20251231.xsd#boom_DefinedContributionPlanEmployerMatchLevelOne"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:to="loc_boom_DefinedContributionPlanEmployerMatchLevelOne_019c3370-eb0b-79cb-8ced-a8b64f5b6c89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DefinedContributionPlanEmployerMatchEmployeeContributionLevelOne_019c3370-eb0b-7c4e-817a-a6bd590e0805" xlink:href="boom-20251231.xsd#boom_DefinedContributionPlanEmployerMatchEmployeeContributionLevelOne"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:to="loc_boom_DefinedContributionPlanEmployerMatchEmployeeContributionLevelOne_019c3370-eb0b-7c4e-817a-a6bd590e0805" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DefinedContributionPlanEmployerMatchLevelTwo_019c3370-eb0b-7d41-9870-9fa1f80c636d" xlink:href="boom-20251231.xsd#boom_DefinedContributionPlanEmployerMatchLevelTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:to="loc_boom_DefinedContributionPlanEmployerMatchLevelTwo_019c3370-eb0b-7d41-9870-9fa1f80c636d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DefinedContributionPlanEmployerMatchEmployeeContributionLevelTwo_019c3370-eb0b-7bc1-916e-7039f6a03c79" xlink:href="boom-20251231.xsd#boom_DefinedContributionPlanEmployerMatchEmployeeContributionLevelTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:to="loc_boom_DefinedContributionPlanEmployerMatchEmployeeContributionLevelTwo_019c3370-eb0b-7bc1-916e-7039f6a03c79" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_019c3370-eb0b-7690-88c5-943bab3b3a11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_019c3370-eb0b-7690-88c5-943bab3b3a11" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_019c3370-eb0b-7baa-b5bd-663583526cc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_019c3370-eb0b-7baa-b5bd-663583526cc9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionExpense_019c3370-eb0b-73c1-a177-72d3f845704c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PensionExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:to="loc_us-gaap_PensionExpense_019c3370-eb0b-73c1-a177-72d3f845704c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_019c3370-eb0b-79ba-b14e-5e3870c9e8e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_019c3370-eb0b-7044-87cb-60e654c2beb1" xlink:to="loc_us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent_019c3370-eb0b-79ba-b14e-5e3870c9e8e8" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/EMPLOYEEBENEFITPLANSDeferredCompensationPlanDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#EMPLOYEEBENEFITPLANSDeferredCompensationPlanDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/EMPLOYEEBENEFITPLANSDeferredCompensationPlanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_6af336a5-9d78-4df0-a67f-b4def6001f72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_c9f1eae3-fe46-4a33-ad8a-d1a105d49f37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_6af336a5-9d78-4df0-a67f-b4def6001f72" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_c9f1eae3-fe46-4a33-ad8a-d1a105d49f37" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_9c119e92-e6f4-472a-81a5-6b2786594f0d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_c9f1eae3-fe46-4a33-ad8a-d1a105d49f37" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_9c119e92-e6f4-472a-81a5-6b2786594f0d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_9c119e92-e6f4-472a-81a5-6b2786594f0d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_9c119e92-e6f4-472a-81a5-6b2786594f0d" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_9c119e92-e6f4-472a-81a5-6b2786594f0d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_895b8513-1640-4fa7-ba5b-1067aa50ebd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_9c119e92-e6f4-472a-81a5-6b2786594f0d" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_895b8513-1640-4fa7-ba5b-1067aa50ebd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentAssetsMember_5d16861f-20cd-4a0a-bbcf-ebeed46f66c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_895b8513-1640-4fa7-ba5b-1067aa50ebd3" xlink:to="loc_us-gaap_OtherCurrentAssetsMember_5d16861f-20cd-4a0a-bbcf-ebeed46f66c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentAssetsMember_70e78f1a-f715-4cfc-beba-629b5b67bf61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_895b8513-1640-4fa7-ba5b-1067aa50ebd3" xlink:to="loc_us-gaap_OtherNoncurrentAssetsMember_70e78f1a-f715-4cfc-beba-629b5b67bf61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_28c5953e-2f97-44ad-807e-8c5017444494" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_895b8513-1640-4fa7-ba5b-1067aa50ebd3" xlink:to="loc_us-gaap_OtherCurrentLiabilitiesMember_28c5953e-2f97-44ad-807e-8c5017444494" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_fe723092-bdf6-4166-8604-3967a2e0e5c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_895b8513-1640-4fa7-ba5b-1067aa50ebd3" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_fe723092-bdf6-4166-8604-3967a2e0e5c5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_3eb3eccb-323b-459c-b7f6-7a0b45ef08cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_6af336a5-9d78-4df0-a67f-b4def6001f72" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_3eb3eccb-323b-459c-b7f6-7a0b45ef08cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_a46e7a1b-a183-4a85-9235-87ff30b188b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_6af336a5-9d78-4df0-a67f-b4def6001f72" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_a46e7a1b-a183-4a85-9235-87ff30b188b8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/IncomeTaxesScheduleofIncomeTaxPaidDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#IncomeTaxesScheduleofIncomeTaxPaidDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/IncomeTaxesScheduleofIncomeTaxPaidDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems_019bc608-62d3-7b64-88c1-9016fb976a09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionTable_019bc5d5-dd62-771f-9cf3-f55e847a2f92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidByIndividualJurisdictionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems_019bc608-62d3-7b64-88c1-9016fb976a09" xlink:to="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionTable_019bc5d5-dd62-771f-9cf3-f55e847a2f92" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_019bc608-62d3-7202-a897-e9942ce5b200" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionTable_019bc5d5-dd62-771f-9cf3-f55e847a2f92" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_019bc608-62d3-7202-a897-e9942ce5b200" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019bc608-62d3-7202-a897-e9942ce5b200_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019bc608-62d3-7202-a897-e9942ce5b200" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019bc608-62d3-7202-a897-e9942ce5b200_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019bc608-62d3-718a-88b9-c0477168efe0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019bc608-62d3-7202-a897-e9942ce5b200" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019bc608-62d3-718a-88b9-c0477168efe0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_019c340c-96fb-7a3d-9df2-a6c2ba395384" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019bc608-62d3-718a-88b9-c0477168efe0" xlink:to="loc_us-gaap_ForeignCountryMember_019c340c-96fb-7a3d-9df2-a6c2ba395384" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_DE_019bc608-62d3-750b-a8ab-ce0c6a64bd44" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_DE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignCountryMember_019c340c-96fb-7a3d-9df2-a6c2ba395384" xlink:to="loc_country_DE_019bc608-62d3-750b-a8ab-ce0c6a64bd44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignTaxJurisdictionOtherMember_019c3378-c070-76f7-8876-dcce4670e7cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignTaxJurisdictionOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignCountryMember_019c340c-96fb-7a3d-9df2-a6c2ba395384" xlink:to="loc_us-gaap_ForeignTaxJurisdictionOtherMember_019c3378-c070-76f7-8876-dcce4670e7cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019bc5cc-adc6-7297-b9f6-8b259d5e66e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidFederalAfterRefundReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems_019bc608-62d3-7b64-88c1-9016fb976a09" xlink:to="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019bc5cc-adc6-7297-b9f6-8b259d5e66e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019bc5cc-adc6-7343-8736-e3f7b435af25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems_019bc608-62d3-7b64-88c1-9016fb976a09" xlink:to="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019bc5cc-adc6-7343-8736-e3f7b435af25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019bc5cc-adc6-7b2a-a2ab-fd20214e33b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidForeignAfterRefundReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems_019bc608-62d3-7b64-88c1-9016fb976a09" xlink:to="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019bc5cc-adc6-7b2a-a2ab-fd20214e33b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019bc5cc-adc6-7507-8ec7-21bd75b5187c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxPaidByIndividualJurisdictionLineItems_019bc608-62d3-7b64-88c1-9016fb976a09" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_019bc5cc-adc6-7507-8ec7-21bd75b5187c" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/INCOMETAXESNarrativeDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#INCOMETAXESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/INCOMETAXESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_5ca5b32a-3af1-4dfc-a40c-f8882bc6336a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLossCarryforwardsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_6a3061c2-2c3d-4528-b4f1-41acf281dd83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLossCarryforwardsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_5ca5b32a-3af1-4dfc-a40c-f8882bc6336a" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_6a3061c2-2c3d-4528-b4f1-41acf281dd83" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_96208dec-3119-44b8-81aa-bac40688526f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_6a3061c2-2c3d-4528-b4f1-41acf281dd83" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_96208dec-3119-44b8-81aa-bac40688526f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_96208dec-3119-44b8-81aa-bac40688526f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_96208dec-3119-44b8-81aa-bac40688526f" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_96208dec-3119-44b8-81aa-bac40688526f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_ae8ea30a-fc3c-4dd7-9c1c-2cb4d2cc2770" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_96208dec-3119-44b8-81aa-bac40688526f" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_ae8ea30a-fc3c-4dd7-9c1c-2cb4d2cc2770" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_ccbd0d63-1fcb-4084-9bc0-f233767720e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_ae8ea30a-fc3c-4dd7-9c1c-2cb4d2cc2770" xlink:to="loc_us-gaap_ForeignCountryMember_ccbd0d63-1fcb-4084-9bc0-f233767720e7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_019c59f3-3863-7dd5-8319-465cf9461804" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_ae8ea30a-fc3c-4dd7-9c1c-2cb4d2cc2770" xlink:to="loc_us-gaap_DomesticCountryMember_019c59f3-3863-7dd5-8319-465cf9461804" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_cfdc3a81-3c0c-46b5-b587-845d696b39fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StateAndLocalJurisdictionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_ae8ea30a-fc3c-4dd7-9c1c-2cb4d2cc2770" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_cfdc3a81-3c0c-46b5-b587-845d696b39fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_6cbbb94a-5490-4b89-be0c-edebfba9b3b4" 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_OperatingLossCarryforwardsTable_6a3061c2-2c3d-4528-b4f1-41acf281dd83" xlink:to="loc_srt_RangeAxis_6cbbb94a-5490-4b89-be0c-edebfba9b3b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_6cbbb94a-5490-4b89-be0c-edebfba9b3b4_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_6cbbb94a-5490-4b89-be0c-edebfba9b3b4" xlink:to="loc_srt_RangeMember_6cbbb94a-5490-4b89-be0c-edebfba9b3b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_e472d4a6-40fa-4e22-b012-79edf80ede70" 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_6cbbb94a-5490-4b89-be0c-edebfba9b3b4" xlink:to="loc_srt_RangeMember_e472d4a6-40fa-4e22-b012-79edf80ede70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_6bf675ff-5b3d-4928-afa5-ea21a78d482d" 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_e472d4a6-40fa-4e22-b012-79edf80ede70" xlink:to="loc_srt_MinimumMember_6bf675ff-5b3d-4928-afa5-ea21a78d482d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_885b5d4e-b3c1-47c9-b13e-937b4b8c0bce" 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_e472d4a6-40fa-4e22-b012-79edf80ede70" xlink:to="loc_srt_MaximumMember_885b5d4e-b3c1-47c9-b13e-937b4b8c0bce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_4ebf1e76-8a3d-48b2-a3ef-23fb1967d364" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_5ca5b32a-3af1-4dfc-a40c-f8882bc6336a" xlink:to="loc_us-gaap_OperatingLossCarryforwards_4ebf1e76-8a3d-48b2-a3ef-23fb1967d364" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_OperatingLossCarryforwardsTerm_f0b2a48f-880d-4e43-97f4-030e15481fd8" xlink:href="boom-20251231.xsd#boom_OperatingLossCarryforwardsTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_5ca5b32a-3af1-4dfc-a40c-f8882bc6336a" xlink:to="loc_boom_OperatingLossCarryforwardsTerm_f0b2a48f-880d-4e43-97f4-030e15481fd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_898fd498-4aaa-4d2b-b9b5-d3b7ecf05282" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_5ca5b32a-3af1-4dfc-a40c-f8882bc6336a" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_898fd498-4aaa-4d2b-b9b5-d3b7ecf05282" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_3c818304-c845-4a16-af61-d877962d90ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_5ca5b32a-3af1-4dfc-a40c-f8882bc6336a" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_3c818304-c845-4a16-af61-d877962d90ec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_6f942016-ad29-40a4-84ab-bdcb34494fc1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_5ca5b32a-3af1-4dfc-a40c-f8882bc6336a" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_6f942016-ad29-40a4-84ab-bdcb34494fc1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_NumberOfBusinessesDownturned_4a64ebfb-392b-43ee-8a79-9467f9ebc383" xlink:href="boom-20251231.xsd#boom_NumberOfBusinessesDownturned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_5ca5b32a-3af1-4dfc-a40c-f8882bc6336a" xlink:to="loc_boom_NumberOfBusinessesDownturned_4a64ebfb-392b-43ee-8a79-9467f9ebc383" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_84606565-bb73-472a-8c08-2d633a8e17c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_5ca5b32a-3af1-4dfc-a40c-f8882bc6336a" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings_84606565-bb73-472a-8c08-2d633a8e17c7" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/INCOMETAXESScheduleofChangesintheValuationAllowanceforDeferredTaxAssetsDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#INCOMETAXESScheduleofChangesintheValuationAllowanceforDeferredTaxAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/INCOMETAXESScheduleofChangesintheValuationAllowanceforDeferredTaxAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceLineItems_019c65c4-ba4c-776f-85a7-acc7a85ba28c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationAllowanceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceTable_019c65c1-62c6-724e-bae6-864bd38a33ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationAllowanceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_019c65c4-ba4c-776f-85a7-acc7a85ba28c" xlink:to="loc_us-gaap_ValuationAllowanceTable_019c65c1-62c6-724e-bae6-864bd38a33ae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_019c65c1-a0b5-7f54-bbb4-5b8e0e467e69" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationAllowanceByDeferredTaxAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_019c65c1-62c6-724e-bae6-864bd38a33ae" xlink:to="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_019c65c1-a0b5-7f54-bbb4-5b8e0e467e69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_019c65c1-a0b5-7f54-bbb4-5b8e0e467e69_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_019c65c1-a0b5-7f54-bbb4-5b8e0e467e69" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_019c65c1-a0b5-7f54-bbb4-5b8e0e467e69_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_019c65c1-a0b5-78c8-8608-7e6262f37c0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_019c65c1-a0b5-7f54-bbb4-5b8e0e467e69" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_019c65c1-a0b5-78c8-8608-7e6262f37c0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ChargedCreditedToExpensesMember_019c65c1-a0b5-76e4-9e52-8627a87c57b7" xlink:href="boom-20251231.xsd#boom_ChargedCreditedToExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_019c65c1-a0b5-78c8-8608-7e6262f37c0f" xlink:to="loc_boom_ChargedCreditedToExpensesMember_019c65c1-a0b5-76e4-9e52-8627a87c57b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ChargedCreditedToOtherComprehensiveIncomeLossMember_019c65c1-a0b5-7db9-8d62-04b875f07ab5" xlink:href="boom-20251231.xsd#boom_ChargedCreditedToOtherComprehensiveIncomeLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_019c65c1-a0b5-78c8-8608-7e6262f37c0f" xlink:to="loc_boom_ChargedCreditedToOtherComprehensiveIncomeLossMember_019c65c1-a0b5-7db9-8d62-04b875f07ab5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DeferredTaxAssetValuationAllowanceRollForward_019bdf52-80fd-71fc-8852-eb34f462c86d" xlink:href="boom-20251231.xsd#boom_DeferredTaxAssetValuationAllowanceRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_019c65c4-ba4c-776f-85a7-acc7a85ba28c" xlink:to="loc_boom_DeferredTaxAssetValuationAllowanceRollForward_019bdf52-80fd-71fc-8852-eb34f462c86d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_019c337a-d052-775c-bd6f-2037dc36001e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_DeferredTaxAssetValuationAllowanceRollForward_019bdf52-80fd-71fc-8852-eb34f462c86d" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_019c337a-d052-775c-bd6f-2037dc36001e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_019bdf51-e252-7174-a64b-a11eb75d1519" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_DeferredTaxAssetValuationAllowanceRollForward_019bdf52-80fd-71fc-8852-eb34f462c86d" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_019bdf51-e252-7174-a64b-a11eb75d1519" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_019c3380-4d78-73a3-9561-bb315f45b762" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/INCOMETAXESReconciliationofIncomeTaxProvisionDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#INCOMETAXESReconciliationofIncomeTaxProvisionDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/INCOMETAXESReconciliationofIncomeTaxProvisionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019bfea4-8f7e-7f8a-9df0-e730f5cff7f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_019bfea1-e5a8-79bc-8f6c-4caf848617ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019bfea4-8f7e-7f8a-9df0-e730f5cff7f4" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_019bfea1-e5a8-79bc-8f6c-4caf848617ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_019bfea4-8f7e-7e13-9e10-830614a4cafb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTable_019bfea1-e5a8-79bc-8f6c-4caf848617ac" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_019bfea4-8f7e-7e13-9e10-830614a4cafb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019bfea4-8f7e-7e13-9e10-830614a4cafb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019bfea4-8f7e-7e13-9e10-830614a4cafb" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019bfea4-8f7e-7e13-9e10-830614a4cafb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019bfea4-8f7e-7101-a21f-616d2a14aa1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019bfea4-8f7e-7e13-9e10-830614a4cafb" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019bfea4-8f7e-7101-a21f-616d2a14aa1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_019c01b8-ee76-7838-964e-ef97e69e96a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019bfea4-8f7e-7101-a21f-616d2a14aa1c" xlink:to="loc_us-gaap_ForeignCountryMember_019c01b8-ee76-7838-964e-ef97e69e96a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_DE_019bfea4-8f7e-74ae-bdcf-f960d0930bb8" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_DE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignCountryMember_019c01b8-ee76-7838-964e-ef97e69e96a9" xlink:to="loc_country_DE_019bfea4-8f7e-74ae-bdcf-f960d0930bb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignTaxJurisdictionOtherMember_019bfea4-8f7e-7c77-8854-560733578dd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignTaxJurisdictionOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignCountryMember_019c01b8-ee76-7838-964e-ef97e69e96a9" xlink:to="loc_us-gaap_ForeignTaxJurisdictionOtherMember_019bfea4-8f7e-7c77-8854-560733578dd5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_019c01b8-8396-70b0-869d-d4caca0362b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019bfea4-8f7e-7101-a21f-616d2a14aa1c" xlink:to="loc_us-gaap_DomesticCountryMember_019c01b8-8396-70b0-869d-d4caca0362b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019c01b2-d3dd-7647-a118-8fe3dc32250d" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DomesticCountryMember_019c01b8-8396-70b0-869d-d4caca0362b7" xlink:to="loc_country_US_019c01b2-d3dd-7647-a118-8fe3dc32250d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019bfea4-8f7e-7f8a-9df0-e730f5cff7f4" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019c5a8c-45ec-7271-92c9-68a983654d4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019c5a8c-45ec-7271-92c9-68a983654d4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019c5a8c-45ec-7443-b12c-f77ca2514721" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019c5a8c-45ec-7443-b12c-f77ca2514721" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019c5a8c-45ec-75b5-97fa-84f3b1fa7b41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019c5a8c-45ec-75b5-97fa-84f3b1fa7b41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019c5a8c-45ec-70ce-b713-8893a686b512" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019c5a8c-45ec-70ce-b713-8893a686b512" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_019c5a8c-d715-745f-bb6b-850f7de40838" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_019c5a8c-d715-745f-bb6b-850f7de40838" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019c5a8c-45ec-7b15-8dd1-4f1eff022f2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019c5a8c-45ec-7b15-8dd1-4f1eff022f2f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount_019c5a8c-d715-7c40-917b-b963f3defcec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount_019c5a8c-d715-7c40-917b-b963f3defcec" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense_019c5a8c-45ec-71ab-8c65-2fc66845bb9d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationMinorityInterestIncomeExpense_019c5a8c-45ec-71ab-8c65-2fc66845bb9d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_EffectiveIncomeTaxRateReconciliationPermanentItemsAmount_019c5a8c-45ec-710b-b38b-57cc161bee88" xlink:href="boom-20251231.xsd#boom_EffectiveIncomeTaxRateReconciliationPermanentItemsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_boom_EffectiveIncomeTaxRateReconciliationPermanentItemsAmount_019c5a8c-45ec-710b-b38b-57cc161bee88" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019c5a8c-45ec-7fcc-aea0-7d6d773ae012" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019c5a8c-45ec-7fcc-aea0-7d6d773ae012" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCoveredEmployeeShareBasedPaymentArrangementAmount_019c5a8c-d715-73ae-b082-5e38c6e56fdd" xlink:href="boom-20251231.xsd#boom_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCoveredEmployeeShareBasedPaymentArrangementAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_boom_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCoveredEmployeeShareBasedPaymentArrangementAmount_019c5a8c-d715-73ae-b082-5e38c6e56fdd" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_019c5a8c-d715-758e-b7de-e17deea29015" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationTaxContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_019c5a8c-d715-758e-b7de-e17deea29015" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_019c8623-5399-747c-9fee-03c882a4e67a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_019c8623-5399-747c-9fee-03c882a4e67a" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_019c5a8c-45ec-70b4-9fc2-c8ae5f3dd0be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings_019c5a8c-45ec-70b4-9fc2-c8ae5f3dd0be" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019c5a8c-45ec-7b6c-9d81-dfd08be0438f" 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_IncomeTaxExpenseBenefitContinuingOperationsIncomeTaxReconciliationAbstract_019bfeb1-313c-7336-b233-be163736bc2e" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019c5a8c-45ec-7b6c-9d81-dfd08be0438f" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateReconciliationLineItems_019bfea4-8f7e-7f8a-9df0-e730f5cff7f4" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019c5a97-8b7b-7109-8e04-00959f2e6850" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019c5a97-8b7b-7109-8e04-00959f2e6850" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019c5a97-8b7b-7766-ad3b-6a23b7e107d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019c5a97-8b7b-7766-ad3b-6a23b7e107d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019c5a97-8b7b-73f3-95ef-0e8c179527bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019c5a97-8b7b-73f3-95ef-0e8c179527bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019c5a97-8b7b-7eef-a716-a4f75de1a857" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019c5a97-8b7b-7eef-a716-a4f75de1a857" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_019c5a97-8b7b-7611-ab7a-f5c582c016bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_019c5a97-8b7b-7611-ab7a-f5c582c016bc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019c5a97-8b7b-7ec9-8226-b732c7d2188f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019c5a97-8b7b-7ec9-8226-b732c7d2188f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherPercent_019c5a97-8b7b-7fc7-af9d-9785306a3e4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherPercent_019c5a97-8b7b-7fc7-af9d-9785306a3e4c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense_019c5a97-8b7b-77e8-9a08-16647dbfe5e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense_019c5a97-8b7b-77e8-9a08-16647dbfe5e4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_EffectiveIncomeTaxRateReconciliationPermanentItemsPercent_019c5a97-8b7b-7045-9368-cdd45dceb8bc" xlink:href="boom-20251231.xsd#boom_EffectiveIncomeTaxRateReconciliationPermanentItemsPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_boom_EffectiveIncomeTaxRateReconciliationPermanentItemsPercent_019c5a97-8b7b-7045-9368-cdd45dceb8bc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019c5a97-8b7b-7880-95b3-4f5cb28666ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019c5a97-8b7b-7880-95b3-4f5cb28666ce" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCoveredEmployeeShareBasedPaymentArrangementPercent_019c5a97-8b7b-79a9-873c-b4f90026506c" xlink:href="boom-20251231.xsd#boom_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCoveredEmployeeShareBasedPaymentArrangementPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_boom_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseCoveredEmployeeShareBasedPaymentArrangementPercent_019c5a97-8b7b-79a9-873c-b4f90026506c" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_019c5a97-8b7b-7403-aa4e-6c0305ad8e3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_019c5a97-8b7b-7403-aa4e-6c0305ad8e3c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019c5a97-8b7b-7714-9974-14f6199f4049" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_019bfeb1-d1cc-79ff-aabc-1a8569ea94ea" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019c5a97-8b7b-7714-9974-14f6199f4049" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/BUSINESSSEGMENTSNarrativeDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#BUSINESSSEGMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/BUSINESSSEGMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_67647052-db6e-4103-a5f8-b70578dc0efe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a84f1a1-6c51-4fbf-b755-12d5cf9e87fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_67647052-db6e-4103-a5f8-b70578dc0efe" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a84f1a1-6c51-4fbf-b755-12d5cf9e87fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_d69c4e04-bc6d-4c9f-86b9-ad0ca9ad8169" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a84f1a1-6c51-4fbf-b755-12d5cf9e87fc" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_d69c4e04-bc6d-4c9f-86b9-ad0ca9ad8169" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_d69c4e04-bc6d-4c9f-86b9-ad0ca9ad8169_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_d69c4e04-bc6d-4c9f-86b9-ad0ca9ad8169" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_d69c4e04-bc6d-4c9f-86b9-ad0ca9ad8169_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_608bd551-2ffe-4922-b7a2-a6c7f3fa3f63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_d69c4e04-bc6d-4c9f-86b9-ad0ca9ad8169" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_608bd551-2ffe-4922-b7a2-a6c7f3fa3f63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsMember_6cb2aba3-1a92-45fe-83b8-aca5d01c22ee" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_608bd551-2ffe-4922-b7a2-a6c7f3fa3f63" xlink:to="loc_boom_ArcadiaProductsMember_6cb2aba3-1a92-45fe-83b8-aca5d01c22ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_94b3e461-0baa-452d-a20c-10e58b9b7995" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a84f1a1-6c51-4fbf-b755-12d5cf9e87fc" xlink:to="loc_srt_MajorCustomersAxis_94b3e461-0baa-452d-a20c-10e58b9b7995" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_94b3e461-0baa-452d-a20c-10e58b9b7995_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_94b3e461-0baa-452d-a20c-10e58b9b7995" xlink:to="loc_srt_NameOfMajorCustomerDomain_94b3e461-0baa-452d-a20c-10e58b9b7995_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_cf8ac97b-6c66-4212-8b0e-d0c7245d1a0d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_94b3e461-0baa-452d-a20c-10e58b9b7995" xlink:to="loc_srt_NameOfMajorCustomerDomain_cf8ac97b-6c66-4212-8b0e-d0c7245d1a0d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_OneCustomerMember_2269ac79-544a-453d-b6ff-deac85706700" xlink:href="boom-20251231.xsd#boom_OneCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_cf8ac97b-6c66-4212-8b0e-d0c7245d1a0d" xlink:to="loc_boom_OneCustomerMember_2269ac79-544a-453d-b6ff-deac85706700" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_e406d7c6-18e2-4ccc-a0ae-86d32ab7333d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a84f1a1-6c51-4fbf-b755-12d5cf9e87fc" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_e406d7c6-18e2-4ccc-a0ae-86d32ab7333d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_e406d7c6-18e2-4ccc-a0ae-86d32ab7333d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_e406d7c6-18e2-4ccc-a0ae-86d32ab7333d" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_e406d7c6-18e2-4ccc-a0ae-86d32ab7333d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f918c802-26ad-4165-85bc-c807aaf35085" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_e406d7c6-18e2-4ccc-a0ae-86d32ab7333d" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f918c802-26ad-4165-85bc-c807aaf35085" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_dcc8a6d5-0c01-4f72-bd3f-a1cb2f41f5f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f918c802-26ad-4165-85bc-c807aaf35085" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_dcc8a6d5-0c01-4f72-bd3f-a1cb2f41f5f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_2b10ceb5-aa30-45f2-8f48-742cfb5e6d7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_f918c802-26ad-4165-85bc-c807aaf35085" xlink:to="loc_us-gaap_AccountsReceivableMember_2b10ceb5-aa30-45f2-8f48-742cfb5e6d7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_29ed5c0f-e760-4884-93c8-e738155e2496" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a84f1a1-6c51-4fbf-b755-12d5cf9e87fc" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_29ed5c0f-e760-4884-93c8-e738155e2496" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_29ed5c0f-e760-4884-93c8-e738155e2496_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_29ed5c0f-e760-4884-93c8-e738155e2496" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_29ed5c0f-e760-4884-93c8-e738155e2496_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_ad773e30-072d-4efe-a589-16b3978ba3b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_29ed5c0f-e760-4884-93c8-e738155e2496" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_ad773e30-072d-4efe-a589-16b3978ba3b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_f7a0c546-96bc-420a-8971-4bb8638672b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_ad773e30-072d-4efe-a589-16b3978ba3b4" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_f7a0c546-96bc-420a-8971-4bb8638672b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_588f6fb9-f719-4e68-a03a-e3890309422b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7a84f1a1-6c51-4fbf-b755-12d5cf9e87fc" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_588f6fb9-f719-4e68-a03a-e3890309422b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_588f6fb9-f719-4e68-a03a-e3890309422b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_588f6fb9-f719-4e68-a03a-e3890309422b" xlink:to="loc_us-gaap_SegmentDomain_588f6fb9-f719-4e68-a03a-e3890309422b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_7e3a13d4-3d6e-4064-8b49-a880f4b44d3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_588f6fb9-f719-4e68-a03a-e3890309422b" xlink:to="loc_us-gaap_SegmentDomain_7e3a13d4-3d6e-4064-8b49-a880f4b44d3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DynaEnergeticsSegmentMember_1a6b2b80-5cd6-4f80-89a1-7912490eb793" xlink:href="boom-20251231.xsd#boom_DynaEnergeticsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_7e3a13d4-3d6e-4064-8b49-a880f4b44d3f" xlink:to="loc_boom_DynaEnergeticsSegmentMember_1a6b2b80-5cd6-4f80-89a1-7912490eb793" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_05466d55-7a66-4478-8ac6-eb200ff4510e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_67647052-db6e-4103-a5f8-b70578dc0efe" xlink:to="loc_us-gaap_NumberOfReportableSegments_05466d55-7a66-4478-8ac6-eb200ff4510e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_69277123-274d-45ee-88f6-d3ebb99cb1c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_67647052-db6e-4103-a5f8-b70578dc0efe" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_69277123-274d-45ee-88f6-d3ebb99cb1c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_3673666d-e4e9-410d-a294-93c6081c229c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_67647052-db6e-4103-a5f8-b70578dc0efe" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_3673666d-e4e9-410d-a294-93c6081c229c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/BUSINESSSEGMENTSSegmentOperationsandAssetsDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#BUSINESSSEGMENTSSegmentOperationsandAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/BUSINESSSEGMENTSSegmentOperationsandAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_128356cc-0f86-4507-96d4-07cb49326ca9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0356af58-c3b4-411d-9c11-5c133266df94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_128356cc-0f86-4507-96d4-07cb49326ca9" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0356af58-c3b4-411d-9c11-5c133266df94" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_e350f31c-0274-4857-97f4-0f488185bdf6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0356af58-c3b4-411d-9c11-5c133266df94" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_e350f31c-0274-4857-97f4-0f488185bdf6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e350f31c-0274-4857-97f4-0f488185bdf6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e350f31c-0274-4857-97f4-0f488185bdf6" xlink:to="loc_us-gaap_SegmentDomain_e350f31c-0274-4857-97f4-0f488185bdf6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c5d6fc0b-4116-428b-b9dd-a5a3b1fa83a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e350f31c-0274-4857-97f4-0f488185bdf6" xlink:to="loc_us-gaap_SegmentDomain_c5d6fc0b-4116-428b-b9dd-a5a3b1fa83a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsSegmentMember_0b8837aa-41fd-4108-8d85-7ad85e9529c3" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c5d6fc0b-4116-428b-b9dd-a5a3b1fa83a1" xlink:to="loc_boom_ArcadiaProductsSegmentMember_0b8837aa-41fd-4108-8d85-7ad85e9529c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DynaEnergeticsSegmentMember_0c3d032f-6187-444e-83fa-f032d9a6be62" xlink:href="boom-20251231.xsd#boom_DynaEnergeticsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c5d6fc0b-4116-428b-b9dd-a5a3b1fa83a1" xlink:to="loc_boom_DynaEnergeticsSegmentMember_0c3d032f-6187-444e-83fa-f032d9a6be62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_NobelCladSegmentMember_7beb91b6-69ea-4d35-99e7-c62da41e2b25" xlink:href="boom-20251231.xsd#boom_NobelCladSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c5d6fc0b-4116-428b-b9dd-a5a3b1fa83a1" xlink:to="loc_boom_NobelCladSegmentMember_7beb91b6-69ea-4d35-99e7-c62da41e2b25" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_ea1ae4c7-c81a-449b-a454-a4cd0d7dac54" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0356af58-c3b4-411d-9c11-5c133266df94" xlink:to="loc_srt_ConsolidationItemsAxis_ea1ae4c7-c81a-449b-a454-a4cd0d7dac54" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_ea1ae4c7-c81a-449b-a454-a4cd0d7dac54_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_ea1ae4c7-c81a-449b-a454-a4cd0d7dac54" xlink:to="loc_srt_ConsolidationItemsDomain_ea1ae4c7-c81a-449b-a454-a4cd0d7dac54_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_35b3fe32-05ed-44fa-898d-aaea54ed1b0b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_ea1ae4c7-c81a-449b-a454-a4cd0d7dac54" xlink:to="loc_srt_ConsolidationItemsDomain_35b3fe32-05ed-44fa-898d-aaea54ed1b0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_40f94785-c61e-467f-b3ce-55586e54dcc3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_35b3fe32-05ed-44fa-898d-aaea54ed1b0b" xlink:to="loc_us-gaap_OperatingSegmentsMember_40f94785-c61e-467f-b3ce-55586e54dcc3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_a0074c75-c017-4276-bddd-ecda69392f44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_35b3fe32-05ed-44fa-898d-aaea54ed1b0b" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_a0074c75-c017-4276-bddd-ecda69392f44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_0f148f2d-56a4-4a89-bbe4-be59adb4dd58" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_35b3fe32-05ed-44fa-898d-aaea54ed1b0b" xlink:to="loc_us-gaap_CorporateNonSegmentMember_0f148f2d-56a4-4a89-bbe4-be59adb4dd58" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_b99fe194-bcec-46ca-b837-f39848570acf" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0356af58-c3b4-411d-9c11-5c133266df94" xlink:to="loc_srt_StatementGeographicalAxis_b99fe194-bcec-46ca-b837-f39848570acf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_b99fe194-bcec-46ca-b837-f39848570acf_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_b99fe194-bcec-46ca-b837-f39848570acf" xlink:to="loc_srt_SegmentGeographicalDomain_b99fe194-bcec-46ca-b837-f39848570acf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_41101e8c-cfea-46d6-afb9-d8742d2be056" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_b99fe194-bcec-46ca-b837-f39848570acf" xlink:to="loc_srt_SegmentGeographicalDomain_41101e8c-cfea-46d6-afb9-d8742d2be056" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_2c2641c8-b787-4415-96f0-c9913350c028" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_41101e8c-cfea-46d6-afb9-d8742d2be056" xlink:to="loc_country_US_2c2641c8-b787-4415-96f0-c9913350c028" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_DE_5a27a415-de2e-405b-8f7e-56a7e1b56408" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_DE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_41101e8c-cfea-46d6-afb9-d8742d2be056" xlink:to="loc_country_DE_5a27a415-de2e-405b-8f7e-56a7e1b56408" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_19180107-68b9-458b-a34e-3d954c7b3245" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_41101e8c-cfea-46d6-afb9-d8742d2be056" xlink:to="loc_country_CA_19180107-68b9-458b-a34e-3d954c7b3245" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_FR_1cce3d9b-9ab4-4af0-bc7a-434f5a056a42" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_FR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_41101e8c-cfea-46d6-afb9-d8742d2be056" xlink:to="loc_country_FR_1cce3d9b-9ab4-4af0-bc7a-434f5a056a42" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RestOfTheWorldMember_f94e5804-d1d6-42b3-aef6-7e4c68e64e76" xlink:href="boom-20251231.xsd#boom_RestOfTheWorldMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_41101e8c-cfea-46d6-afb9-d8742d2be056" xlink:to="loc_boom_RestOfTheWorldMember_f94e5804-d1d6-42b3-aef6-7e4c68e64e76" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_35ffbcbe-8d77-48ca-bfc5-c482a8070886" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_128356cc-0f86-4507-96d4-07cb49326ca9" xlink:to="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_35ffbcbe-8d77-48ca-bfc5-c482a8070886" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_35ffbcbe-8d77-48ca-bfc5-c482a8070886" xlink:to="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a5cc1c69-be60-4aed-b2fc-a0ec885fe3d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a5cc1c69-be60-4aed-b2fc-a0ec885fe3d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_3802a7dd-c9bb-4763-b1cd-5fe4bb664fbd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_3802a7dd-c9bb-4763-b1cd-5fe4bb664fbd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_b2e68e3c-2e93-43a6-935b-38114451bffe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_GrossProfit_b2e68e3c-2e93-43a6-935b-38114451bffe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ShareBasedPaymentArrangementAttributableToParent_86406752-690d-4d7d-87d1-719287202077" xlink:href="boom-20251231.xsd#boom_ShareBasedPaymentArrangementAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_boom_ShareBasedPaymentArrangementAttributableToParent_86406752-690d-4d7d-87d1-719287202077" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_c90dfc74-de46-4fb2-b240-b75ba8213250" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_c90dfc74-de46-4fb2-b240-b75ba8213250" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingExpense_022ce074-b767-4aed-977f-21d9207b6a34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_SellingExpense_022ce074-b767-4aed-977f-21d9207b6a34" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_fc600887-8a12-41c0-a1f8-e5e1caace1de" 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_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_fc600887-8a12-41c0-a1f8-e5e1caace1de" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_98251bdf-a175-4445-8a1f-8fd28dd06500" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostsAndAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_RestructuringCostsAndAssetImpairmentCharges_98251bdf-a175-4445-8a1f-8fd28dd06500" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_1144ca54-2542-4519-9d5c-0ae4b56212e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_1144ca54-2542-4519-9d5c-0ae4b56212e3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_75c0efa9-970b-471f-9498-574b435e7f46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_OperatingIncomeLoss_75c0efa9-970b-471f-9498-574b435e7f46" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_CorporateExpenses_748082c8-53c1-4d6b-8353-a1b57df5e342" xlink:href="boom-20251231.xsd#boom_CorporateExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_boom_CorporateExpenses_748082c8-53c1-4d6b-8353-a1b57df5e342" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_406a7538-480f-4be8-98e8-68fbd6fed289" 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_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_406a7538-480f-4be8-98e8-68fbd6fed289" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_7754001d-f5a8-4cdc-82ed-930c36bcd9db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_7754001d-f5a8-4cdc-82ed-930c36bcd9db" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_9326c852-6852-4caa-baec-bfb27080b48e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_InterestExpenseNonoperating_9326c852-6852-4caa-baec-bfb27080b48e" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_f8908349-1712-41b6-9120-cac8c98691b0" 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_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_f8908349-1712-41b6-9120-cac8c98691b0" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_e830af53-d34b-48ab-976d-e526712b84f9" 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_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_e830af53-d34b-48ab-976d-e526712b84f9" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_4987fc55-0d2e-4fc7-abb2-431b137a39fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationOfOperatingProfitLossFromSegmentsToConsolidatedAbstract_7758d6dd-254d-4f2b-8740-d911e71113ec" xlink:to="loc_us-gaap_ProfitLoss_4987fc55-0d2e-4fc7-abb2-431b137a39fb" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ShareBasedPaymentArrangementExpenseAllocationPercentageOfParent_fe6e68af-973a-4db3-9b26-ddc06ba0f4cc" xlink:href="boom-20251231.xsd#boom_ShareBasedPaymentArrangementExpenseAllocationPercentageOfParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_35ffbcbe-8d77-48ca-bfc5-c482a8070886" xlink:to="loc_boom_ShareBasedPaymentArrangementExpenseAllocationPercentageOfParent_fe6e68af-973a-4db3-9b26-ddc06ba0f4cc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ShareBasedPaymentArrangementExpenseAllocationPercentageOfNoncontrollingOwners_0af2a6c3-94f0-4598-b287-56dd3f068a66" xlink:href="boom-20251231.xsd#boom_ShareBasedPaymentArrangementExpenseAllocationPercentageOfNoncontrollingOwners"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_35ffbcbe-8d77-48ca-bfc5-c482a8070886" xlink:to="loc_boom_ShareBasedPaymentArrangementExpenseAllocationPercentageOfNoncontrollingOwners_0af2a6c3-94f0-4598-b287-56dd3f068a66" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_2568cdcb-8bff-4aab-9c7d-7ea7bc55bc79" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingDisclosureOfEntitysReportableSegmentsAbstract_35ffbcbe-8d77-48ca-bfc5-c482a8070886" xlink:to="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_2568cdcb-8bff-4aab-9c7d-7ea7bc55bc79" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_6871a36c-bea6-46ee-9eee-206169003f0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_2568cdcb-8bff-4aab-9c7d-7ea7bc55bc79" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_6871a36c-bea6-46ee-9eee-206169003f0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_fe08a61b-04dd-40ce-bfea-8e8d9d687681" 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_ReconciliationFromSegmentTotalsToConsolidatedAbstract_2568cdcb-8bff-4aab-9c7d-7ea7bc55bc79" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_fe08a61b-04dd-40ce-bfea-8e8d9d687681" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_e569252c-00fb-4bd5-ac36-84df24cc8e28" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReconciliationFromSegmentTotalsToConsolidatedAbstract_2568cdcb-8bff-4aab-9c7d-7ea7bc55bc79" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_e569252c-00fb-4bd5-ac36-84df24cc8e28" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/BUSINESSSEGMENTSGeographicInformationDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#BUSINESSSEGMENTSGeographicInformationDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/BUSINESSSEGMENTSGeographicInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_6e979d15-4fa9-4d68-aa3a-6e18bc4a2db8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_6f7daf47-872c-4276-b77b-6fffc80b6be0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_6e979d15-4fa9-4d68-aa3a-6e18bc4a2db8" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_6f7daf47-872c-4276-b77b-6fffc80b6be0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_c8bb7bef-7fd0-476f-80d7-46635fa8b889" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_6f7daf47-872c-4276-b77b-6fffc80b6be0" xlink:to="loc_srt_StatementGeographicalAxis_c8bb7bef-7fd0-476f-80d7-46635fa8b889" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_c8bb7bef-7fd0-476f-80d7-46635fa8b889_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_c8bb7bef-7fd0-476f-80d7-46635fa8b889" xlink:to="loc_srt_SegmentGeographicalDomain_c8bb7bef-7fd0-476f-80d7-46635fa8b889_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_c8bb7bef-7fd0-476f-80d7-46635fa8b889" xlink:to="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_WestMember_65dbb5ba-f341-4f93-aab2-5077e65d1406" xlink:href="boom-20251231.xsd#boom_WestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_boom_WestMember_65dbb5ba-f341-4f93-aab2-5077e65d1406" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_SouthMember_f432702e-5f12-48f3-9d7a-1292dc6f383d" xlink:href="boom-20251231.xsd#boom_SouthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_boom_SouthMember_f432702e-5f12-48f3-9d7a-1292dc6f383d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_NortheastMember_4b4f0cf7-fae5-4d75-ab43-7ad381698f71" xlink:href="boom-20251231.xsd#boom_NortheastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_boom_NortheastMember_4b4f0cf7-fae5-4d75-ab43-7ad381698f71" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_MidwestMember_c009416f-41b9-48e0-998e-73d1d993c898" xlink:href="boom-20251231.xsd#boom_MidwestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_boom_MidwestMember_c009416f-41b9-48e0-998e-73d1d993c898" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_c9ab41ff-edee-4ee1-91bb-494d0f04adc7" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_US_c9ab41ff-edee-4ee1-91bb-494d0f04adc7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_776c1f17-e425-446f-b935-0377697e6534" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_CA_776c1f17-e425-446f-b935-0377697e6534" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_KW_e65a5338-6b3e-483d-baef-bec4766008ab" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_KW"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_KW_e65a5338-6b3e-483d-baef-bec4766008ab" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_OM_df31ca3f-cc73-4d16-b4c8-d5d3fa83cb58" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_OM"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_OM_df31ca3f-cc73-4d16-b4c8-d5d3fa83cb58" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_ID_019bdc3e-f7bf-7eef-ac1e-09c3b45923e7" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_ID"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_ID_019bdc3e-f7bf-7eef-ac1e-09c3b45923e7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_EG_4ad500bd-c357-4e35-bdea-5bf70c2a40b4" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_EG"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_EG_4ad500bd-c357-4e35-bdea-5bf70c2a40b4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_AE_3f912320-9af8-49b7-9fc1-ed011e315cfc" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_AE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_AE_3f912320-9af8-49b7-9fc1-ed011e315cfc" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_IQ_cb9df3f4-10c9-4b53-9cf6-13dbd965de9b" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IQ"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_IQ_cb9df3f4-10c9-4b53-9cf6-13dbd965de9b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_IN_edb90057-59bd-42b5-94fa-9c18a30b421c" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_IN_edb90057-59bd-42b5-94fa-9c18a30b421c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_RestOfTheWorldMember_e5ebbb61-3490-4f13-b4ac-04b8275b74be" xlink:href="boom-20251231.xsd#boom_RestOfTheWorldMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_boom_RestOfTheWorldMember_e5ebbb61-3490-4f13-b4ac-04b8275b74be" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_DE_8a44f0d7-2146-42d7-ad2b-1743fc81c264" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_DE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_DE_8a44f0d7-2146-42d7-ad2b-1743fc81c264" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_KR_019c019d-5c27-79c6-b643-8f74e33ea3b9" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_KR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_KR_019c019d-5c27-79c6-b643-8f74e33ea3b9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CN_ffe9adf0-606f-4d29-a969-8ed77e576227" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_CN_ffe9adf0-606f-4d29-a969-8ed77e576227" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_BE_019bdc3d-cd69-7bbd-98a9-150e8b35636c" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_BE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_BE_019bdc3d-cd69-7bbd-98a9-150e8b35636c" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_SA_c7e81453-b8e9-4373-968d-d70430909a74" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_SA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_SA_c7e81453-b8e9-4373-968d-d70430909a74" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_FR_90761b73-2a60-454e-be03-9b236cf3bb84" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_FR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_FR_90761b73-2a60-454e-be03-9b236cf3bb84" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_NL_4dbd4e80-5ed0-4f8f-8906-734f0dff36ac" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_NL"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c3c0257d-59c5-4217-8f3a-9eec3f469a08" xlink:to="loc_country_NL_4dbd4e80-5ed0-4f8f-8906-734f0dff36ac" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_3e812edb-c094-4d11-b1bb-099bb74ada74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_6f7daf47-872c-4276-b77b-6fffc80b6be0" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_3e812edb-c094-4d11-b1bb-099bb74ada74" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3e812edb-c094-4d11-b1bb-099bb74ada74_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3e812edb-c094-4d11-b1bb-099bb74ada74" xlink:to="loc_us-gaap_SegmentDomain_3e812edb-c094-4d11-b1bb-099bb74ada74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_db1ce30d-1bf7-45fd-b6e2-d3494d92b329" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3e812edb-c094-4d11-b1bb-099bb74ada74" xlink:to="loc_us-gaap_SegmentDomain_db1ce30d-1bf7-45fd-b6e2-d3494d92b329" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ArcadiaProductsSegmentMember_50ee6ffa-afd3-4fa9-bfff-6a07dc7386b7" xlink:href="boom-20251231.xsd#boom_ArcadiaProductsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_db1ce30d-1bf7-45fd-b6e2-d3494d92b329" xlink:to="loc_boom_ArcadiaProductsSegmentMember_50ee6ffa-afd3-4fa9-bfff-6a07dc7386b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_DynaEnergeticsSegmentMember_144039e8-2538-48b5-8482-8f0251cc95b0" xlink:href="boom-20251231.xsd#boom_DynaEnergeticsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_db1ce30d-1bf7-45fd-b6e2-d3494d92b329" xlink:to="loc_boom_DynaEnergeticsSegmentMember_144039e8-2538-48b5-8482-8f0251cc95b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_NobelCladSegmentMember_9ad387d4-ec70-42f0-83a2-81ebb4640476" xlink:href="boom-20251231.xsd#boom_NobelCladSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_db1ce30d-1bf7-45fd-b6e2-d3494d92b329" xlink:to="loc_boom_NobelCladSegmentMember_9ad387d4-ec70-42f0-83a2-81ebb4640476" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2665d640-9371-4f68-b60c-933a96de708c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_6e979d15-4fa9-4d68-aa3a-6e18bc4a2db8" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2665d640-9371-4f68-b60c-933a96de708c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/DERIVATIVEINSTRUMENTSNarrativeDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#DERIVATIVEINSTRUMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/DERIVATIVEINSTRUMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_cb1264e2-0e4e-44c9-a1ca-94e1de352e36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_1ebb0322-8754-4985-bdde-ac750c9e3f50" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_cb1264e2-0e4e-44c9-a1ca-94e1de352e36" xlink:to="loc_us-gaap_DerivativeTable_1ebb0322-8754-4985-bdde-ac750c9e3f50" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_ccafbe19-0e8c-49e0-b2c4-6e1b66b4d234" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_1ebb0322-8754-4985-bdde-ac750c9e3f50" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_ccafbe19-0e8c-49e0-b2c4-6e1b66b4d234" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_ccafbe19-0e8c-49e0-b2c4-6e1b66b4d234_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_ccafbe19-0e8c-49e0-b2c4-6e1b66b4d234" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_ccafbe19-0e8c-49e0-b2c4-6e1b66b4d234_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_e794e158-2422-4ddc-9ea8-e2e1258ec3fc" 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_ccafbe19-0e8c-49e0-b2c4-6e1b66b4d234" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_e794e158-2422-4ddc-9ea8-e2e1258ec3fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_ac78269b-b705-44b3-aab5-f383a58b5312" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_e794e158-2422-4ddc-9ea8-e2e1258ec3fc" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_ac78269b-b705-44b3-aab5-f383a58b5312" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_f3185b91-1b08-4a30-8b6c-c7243a8b04cf" 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_cb1264e2-0e4e-44c9-a1ca-94e1de352e36" xlink:to="loc_us-gaap_DerivativeNotionalAmount_f3185b91-1b08-4a30-8b6c-c7243a8b04cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeNet_fb5d19f2-c457-4e3d-9fb1-abf54c6ab380" 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_cb1264e2-0e4e-44c9-a1ca-94e1de352e36" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeNet_fb5d19f2-c457-4e3d-9fb1-abf54c6ab380" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/DERIVATIVEINSTRUMENTSScheduleofGainsLossesonDerivativesDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#DERIVATIVEINSTRUMENTSScheduleofGainsLossesonDerivativesDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/DERIVATIVEINSTRUMENTSScheduleofGainsLossesonDerivativesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_adb22548-a395-4711-a04c-405c04164b54" 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_e2e6f25c-3366-41c6-9fa3-a9f1ffd2828c" 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_adb22548-a395-4711-a04c-405c04164b54" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_e2e6f25c-3366-41c6-9fa3-a9f1ffd2828c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_81cc9e13-1f89-4586-b7fb-9abd07c6a4cb" 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_e2e6f25c-3366-41c6-9fa3-a9f1ffd2828c" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_81cc9e13-1f89-4586-b7fb-9abd07c6a4cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_81cc9e13-1f89-4586-b7fb-9abd07c6a4cb_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_81cc9e13-1f89-4586-b7fb-9abd07c6a4cb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_81cc9e13-1f89-4586-b7fb-9abd07c6a4cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_56025cd2-a6ab-42ec-9634-4b3dd06f5490" 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_81cc9e13-1f89-4586-b7fb-9abd07c6a4cb" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_56025cd2-a6ab-42ec-9634-4b3dd06f5490" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_ff717ba0-1fd2-437c-8b08-5b4647c7d588" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_56025cd2-a6ab-42ec-9634-4b3dd06f5490" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_ff717ba0-1fd2-437c-8b08-5b4647c7d588" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_bdb78c71-b4d8-4b6c-9eda-37de6f5ca08f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_adb22548-a395-4711-a04c-405c04164b54" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_bdb78c71-b4d8-4b6c-9eda-37de6f5ca08f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dynamicmaterials.com/role/STRATEGICREVIEWANDRELATEDEXPENSESDetails" xlink:type="simple" xlink:href="boom-20251231.xsd#STRATEGICREVIEWANDRELATEDEXPENSESDetails"/>
  <link:definitionLink xlink:role="http://www.dynamicmaterials.com/role/STRATEGICREVIEWANDRELATEDEXPENSESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_04552e8d-7ed1-4fbb-9fd6-5fe1417eba84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_16a837a1-a787-47a0-ab22-3a30f6c3405e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_04552e8d-7ed1-4fbb-9fd6-5fe1417eba84" xlink:to="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_16a837a1-a787-47a0-ab22-3a30f6c3405e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_StrategicReviewCostTypeAxis_dd0637c8-b828-4785-9f41-0a47e51d584c" xlink:href="boom-20251231.xsd#boom_StrategicReviewCostTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_16a837a1-a787-47a0-ab22-3a30f6c3405e" xlink:to="loc_boom_StrategicReviewCostTypeAxis_dd0637c8-b828-4785-9f41-0a47e51d584c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_StrategicReviewCostTypeDomain_dd0637c8-b828-4785-9f41-0a47e51d584c_default" xlink:href="boom-20251231.xsd#boom_StrategicReviewCostTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_boom_StrategicReviewCostTypeAxis_dd0637c8-b828-4785-9f41-0a47e51d584c" xlink:to="loc_boom_StrategicReviewCostTypeDomain_dd0637c8-b828-4785-9f41-0a47e51d584c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_StrategicReviewCostTypeDomain_53b634b2-8b11-432e-876b-608ead7e2912" xlink:href="boom-20251231.xsd#boom_StrategicReviewCostTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_boom_StrategicReviewCostTypeAxis_dd0637c8-b828-4785-9f41-0a47e51d584c" xlink:to="loc_boom_StrategicReviewCostTypeDomain_53b634b2-8b11-432e-876b-608ead7e2912" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_ProfessionalServiceFeesMember_ad952c47-bbbf-4beb-872c-b12c6cbdb46c" xlink:href="boom-20251231.xsd#boom_ProfessionalServiceFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_StrategicReviewCostTypeDomain_53b634b2-8b11-432e-876b-608ead7e2912" xlink:to="loc_boom_ProfessionalServiceFeesMember_ad952c47-bbbf-4beb-872c-b12c6cbdb46c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_EmployeeRetentionCompensationMember_db10f581-0658-4668-9606-f831731e03a8" xlink:href="boom-20251231.xsd#boom_EmployeeRetentionCompensationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_StrategicReviewCostTypeDomain_53b634b2-8b11-432e-876b-608ead7e2912" xlink:to="loc_boom_EmployeeRetentionCompensationMember_db10f581-0658-4668-9606-f831731e03a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_StockBasedCompensationMember_cb237d88-346a-4e1e-b2fe-98e1200b35f7" xlink:href="boom-20251231.xsd#boom_StockBasedCompensationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_boom_StrategicReviewCostTypeDomain_53b634b2-8b11-432e-876b-608ead7e2912" xlink:to="loc_boom_StockBasedCompensationMember_cb237d88-346a-4e1e-b2fe-98e1200b35f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_boom_StrategicReviewAndRelatedMattersExpenses_eae7145b-e4ed-4260-be4d-2d04b00519f5" xlink:href="boom-20251231.xsd#boom_StrategicReviewAndRelatedMattersExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_04552e8d-7ed1-4fbb-9fd6-5fe1417eba84" xlink:to="loc_boom_StrategicReviewAndRelatedMattersExpenses_eae7145b-e4ed-4260-be4d-2d04b00519f5" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_OtherAssetsNoncurrent" xlink:type="arc" order="101"/>
  </link:definitionLink>
</link:linkbase>
