flash flood flashflood • flash-forward · · · Info · Definitions · Synonyms · Characters · · flash flood · · Text Common · · Latin · · Scripts 11 · · Length 2 · · Syllables Definitions · · · (noun) a sudden local flood of great volume and short duration. Synonyms: flash flood, flashflood. · · Noun Definition 1 Synonyms · · · flashflood · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 d latin small letter d U+0064 f latin small letter f U+0066 h latin small letter h U+0068 l latin small letter l U+006C o latin small letter o U+006F s latin small letter s U+0073