Source : Webster's Revised Unabridged Dictionary (1913)

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.

   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.

   Note: This verb is often followed by of; as, to disapprove of
         an opinion, of such conduct. See {Approve}.

Source : WordNet®

disapprove
     v 1: consider bad or wrong [ant: {approve}]
     2: deem wrong or inappropriate; "I disapprove of her child
        rearing methods" [syn: {reject}] [ant: {approve}]