fast of the firstborn fast of tevet • fast one · · · Info · Definitions · Characters · · fast of the firstborn · · Text Common · · Latin · · Scripts 21 · · Length 5 · · Syllables Definitions · · · (noun) (Judaism) a minor fast day on Nissan 14 that is observed only by firstborn males; it is observed on the day before Passover. Synonyms: Fast of the Firstborn. · · Noun Definition 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 f latin small letter f U+0066 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 s latin small letter s U+0073 t latin small letter t U+0074