[1] : The Collaborative International Dictionary of English v.0.48

crumple \crum"ple\ kru^m"p'l, v. t. imp.  p. p. crumpled
   -p'ld; p. pr.  vb. n. crumpling -pli^ng. dim. fr.
   crump, a.
   to draw or press into wrinkles or folds; to crush together;
   to rumple; as, to crumple paper.
   1913 webster

         they crumpled it into all shapes, and diligently
         scanned every wrinkle that could be made. --addison.
   1913 webster
see also:
crumpled crumpling 

[2] : The Collaborative International Dictionary of English v.0.48

crumple \crum"ple\, v. i.
   to contract irregularly; to show wrinkles after being crushed
   together; as, leaves crumple.
   1913 webster

[3] : WordNet (r) 2.0

crumple
     v 1: fall apart; "the building crimbled after the explosion";
          "negociations broke down" syn: crumble, tumble, break
          down, collapse
     2: fold or collapse; "his knees buckled" syn: buckle
     3: to gather something into small wrinkles or folds; "she
        puckered her lips" syn: pucker, rumple, cockle, knit
     4: become wrinkled or crumpled or creased; "this fabric won't
        wrinkle" syn: rumple, wrinkle, crease, crinkle
see also:
crumble tumble break down collapse buckle pucker 
rumple cockle knit wrinkle crease 
crinkle 

[4] : Moby Thesaurus II by Grady Ward, 1.0

54 moby thesaurus words for "crumple":
   bend, break, bristle, buckle, cave, cocker, cockle, collapse,
   contort, corrugate, corrugation, crankle, crease, crimp, crimple,
   crinkle, crook, crush, distort, fold, fold up, furrow, gnarl, go,
   knit, knot, mangle, pucker, purse, ridge, rimple, ripple, rivel,
   ruck, ruckle, ruffle, rumple, screw, scrunch, set on edge, shirr,
   spring, turn, turn awry, twist, wad, warp, wimple, wrench, wrest,
   wring, wrinkle, writhe, yield

Crumple >> C Words
Crumple, definition of term: Crumple
crumple_pag1.html