1. crush (something, typically paper or cloth) so that it becomes creased and wrinkled: "he crumpled up the paper bag"Similarcrushscrunch upscrew upsquashsqueezescrumplecreasewrinklecrinklerumpleruck uptumblerare:ruckleOppositesmooth outiron
▪ become bent, crooked, or creased: "they heard the jetliner crumple moments before it crashed"
▪ (of a person) suddenly flop down to the ground: "she crumpled to the floor in a dead faint"Similarcollapsegive waycave ingo to piecesbreak downcrumblebe overcomeOppositehold out
▪ (of a person's face) suddenly sag and show an expression of desolation:"the child's face crumpled and he began to howl"Similarpuckerscrew upfallsaglook sadlook miserable
noun
1. a crushed fold, crease, or wrinkle.
Word OriginMiddle English: from obsolete crump ‘make or become curved’, from Old Englishcrump ‘bent, crooked’, of West Germanic origin; related to German krumm.