customs service customs duty • customs union · · · Info · Definitions · Characters · · customs service · · Text Common · · Latin · · Scripts 15 · · Length 4 · · Syllables Definitions · · · (noun) the agency of the Treasury Department that enforces import tariffs. Synonyms: Bureau of Customs, Customs Bureau, Customs Service, USCB. · · Noun Definition 1 Characters · · space U+0020 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076