customs duty customs bureau • customs service · · · Info · Definitions · Synonyms · Characters · · customs duty · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) money collected under a tariff. Synonyms: customs, customs duty, custom, impost. · · Noun Definition 1 Synonyms · · · customs · · Synonym 1 custom · · Synonym 2 impost · · Synonym 3 Characters · · space U+0020 c latin small letter c U+0063 d latin small letter d U+0064 m latin small letter m U+006D o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079