Source : Webster's Revised Unabridged Dictionary (1913)

Wrinkle \Wrin"kle\, v. i.
   To shrink into furrows and ridges.

Wrinkle \Wrin"kle\, n.
   A winkle. [Local, U. S.]

Wrinkle \Wrin"kle\, n. [OE. wrinkil, AS. wrincle; akin to OD.
   wrinckel, and prob. to Dan. rynke, Sw. rynka, Icel. hrukka,
   OHG. runza, G. runzel, L. ruga. ????.]
   1. A small ridge, prominence, or furrow formed by the
      shrinking or contraction of any smooth substance; a
      corrugation; a crease; a slight fold; as, wrinkle in the
      skin; a wrinkle in cloth. ``The wrinkles in my brows.''
      --Shak.

            Within I do not find wrinkles and used heart, but
            unspent youth.                        --Emerson.

   2. hence, any roughness; unevenness.

            Not the least wrinkle to deform the sky. --Dryden.

   3. [Perhaps a different word, and a dim. AS. wrenc a
      twisting, deceit. Cf. {Wrench}, n.] A notion or fancy; a
      whim; as, to have a new wrinkle. [Colloq.]

Wrinkle \Wrin"kle\, v. t. [imp. & p. p. {Wrinkled}; p. pr. & vb.
   n. {Wrinkling}.]
   1. To contract into furrows and prominences; to make a
      wrinkle or wrinkles in; to corrugate; as, wrinkle the skin
      or the brow. ``Sport that wrinkled Care derides.''
      --Milton.

            Her wrinkled form in black and white arrayed.
                                                  --Pope.

   2. Hence, to make rough or uneven in any way.

            A keen north wind that, blowing dry, Wrinkled the
            face of deluge, as decayed.           --Milton.

            Then danced we on the wrinkled sand.  --Bryant.

   {To wrinkle at}, to sneer at. [Obs.] --Marston.

Source : WordNet®

wrinkle
     n 1: a slight depression in the smoothness of a surface; "his
          face has many lines"; "ironing gets rid of most
          wrinkles" [syn: {furrow}, {crease}, {crinkle}, {seam}, {line}]
     2: a minor difficulty; "they finally have the wrinkles pretty
        well ironed out"
     3: a clever method of doing something (especially something new
        and different)

wrinkle
     v 1: gather or contract into wrinkles or folds; pucker; "purse
          ones's lips" [syn: {purse}]
     2: make wrinkles or creases into a smooth surface; "The dress
        got wrinkled" [syn: {ruckle}, {crease}, {crinkle}, {scrunch},
         {scrunch up}, {crisp}]
     3: make wrinkled or creased; "furrow one's brow" [syn: {furrow},
         {crease}]
     4: become wrinkled or crumpled or creased; "This fabric won't
        wrinkle" [syn: {rumple}, {crumple}, {crease}, {crinkle}]