The Collaborative International Dictionary of English v.0.48:

Controvert \Con"tro*vert\, v. t. [imp. & p. p. Controverted;
   p. pr. & vb. n. Controverting.] [See Controversy.]
   To make matter of controversy; to dispute or oppose by
   reasoning; to contend against in words or writings; to
   contest; to debate.
   [1913 Webster]

         Some controverted points had decided according to the
         sense of the best jurists.               --Macaulay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

controvert
    v 1: be resistant to; "The board opposed his motion" [syn:
         oppose, controvert, contradict]
    2: prove to be false or incorrect [syn: refute, rebut,
       controvert]