The Collaborative International Dictionary of English v.0.48:

Disapprove \Dis`ap*prove\, v. t. [imp. & p. p. Disapproved; p.
   pr. & vb. n. Disapproving.] [Pref. dis- + approve: cf. F.
   d['e]approuver. Cf. Disapprobation.]
   1. To pass unfavorable judgment upon; to condemn by an act of
      the judgment; to regard as wrong, unsuitable, or
      inexpedient; to censure; as, to disapprove the conduct of
      others.
      [1913 Webster]

   2. To refuse official approbation to; to disallow; to decline
      to sanction; as, the sentence of the court-martial was
      disapproved by the commander in chief.
      [1913 Webster]

   Note: This verb is often followed by of; as, to disapprove of
         an opinion, of such conduct. See Approve.
         [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "disapproved":
   contemned, declined, declined with thanks, denied, despised,
   discarded, discounted, disdained, dismissed, disowned, excepted,
   excluded, forsworn, ignored, not considered, rebuffed, refused,
   rejected, renounced, repudiated, repulsed, scouted, spurned