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]

The Collaborative International Dictionary of English v.0.48:

disapproving \disapproving\ adj.
   expressing disapproval.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

disapproving
    adj 1: expressing or manifesting disapproval