The Collaborative International Dictionary of English v.0.48:

Contort \Con*tort"\, v. t. [L. contortus, p. p. of contorquere
   to twist; con- + torquere to twist. See Torture.]
   To twist, or twist together; to turn awry; to bend; to
   distort; to wrest.
   [1913 Webster]

         The vertebral arteries are variously contorted. --Ray.
   [1913 Webster]

         Kant contorted the term category from the proper
         meaning of attributed.                   --Sir W.
                                                  Hamilton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

contort
    v 1: twist and press out of shape [syn: contort, deform,
         distort, wring]