defense commissary agencyglossary / DEFENSE COMMISSARY AGENCY Defense Commissary Agency. An agency in the U.S. Department of Defense responsible for providing goods and services to members of the armed forces at reduced prices. — Abbr. DeCA. 词条贡献者 双语律师Terence,国际知名法学院法律专业,擅长翻译各类与油气、资源与采矿业相关的法律文件。