crestfallen \ˈ ̷ ̷| ̷ ̷ ̷ ̷\adjective 1.: with drooping crest or hanging head : dispirited, dejected, cowed < let it make thee crestfallen — Shakespeare > 2.of a horse: having the upper part of the neck hanging to one side • crest·fall·en·lyadverb • crest·fall·en·ness\ˈ ̷ ̷|fȯlən(n)ə̇s\noun-es