The Collaborative International Dictionary of English v.0.48:

Wrinkle \Wrin"kle\, v. t. [imp. & p. p. Wrinkled; p. pr. & vb.
   n. Wrinkling.]
   [1913 Webster]
   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.
      [1913 Webster]

            Her wrinkled form in black and white arrayed.
                                                  --Pope.
      [1913 Webster]

   2. Hence, to make rough or uneven in any way.
      [1913 Webster]

            A keen north wind that, blowing dry,
            Wrinkled the face of deluge, as decayed. --Milton.
      [1913 Webster]

            Then danced we on the wrinkled sand.  --Bryant.
      [1913 Webster]

   To wrinkle at, to sneer at. [Obs.] --Marston.
      [1913 Webster]

WordNet (r) 3.0 (2006):

wrinkled
    adj 1: marked by wrinkles; "tired travelers in wrinkled clothes"
           [syn: wrinkled, wrinkly] [ant: unwrinkled,
           wrinkleless]
    2: (of linens or clothes) not ironed; "a pile of unironed
       laundry"; "wore unironed jeans" [syn: unironed, wrinkled]
       [ant: ironed]