jack frost Jack-fool • jackfruit · · · Info · Definitions · Characters · · jack frost · · Text Common · · Latin · · Scripts 10 · · Length 2 · · Syllables Definitions · · · (noun) a personification of frost or winter weather. Synonyms: Jack Frost. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 f latin small letter f U+0066 j latin small letter j U+006A k latin small letter k U+006B 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