registration number registrationist • registrator · · · Info · Definitions · Synonyms · Characters · · registration number · · Text Common · · Latin · · Scripts 19 · · Length 6 · · Syllables Definitions · · · (noun) the number on the license plate that identifies the car that bears it. Synonyms: license number, registration number. · · Noun Definition 1 Synonyms · · · license number · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E 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