authenticator authentication • authenticity · · · Info · Definitions · Synonyms · Characters · · authenticator · · Text Latin · · Script 13 · · Length Definitions · · · (noun) one who determines authenticity (as of works of art) or who guarantees validity. Synonyms: appraiser. · · Noun Definition 1 Synonyms · · · appraiser · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075