countdown countdom • countenance · · · Info · Definitions · Characters · · countdown · · Text Latin · · Script 9 · · Length 2 · · Syllables Definitions · · · (noun) counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle). · · Noun Definition 1 Characters · · c latin small letter c U+0063 d latin small letter d U+0064 n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074 u latin small letter u U+0075 w latin small letter w U+0077