The Collaborative International Dictionary of English v.0.48:

Disapprobation \Dis*ap`pro*ba"tion\, n. [Pref. dis- +
   approbation: cf. F. d['e]sapprobation. Cf. Disapprove.]
   The act of disapproving; mental condemnation of what is
   judged wrong, unsuitable, or inexpedient; feeling of censure.

         We have ever expressed the most unqualified
         disapprobation of all the steps.         --Burke.
   [1913 Webster]

WordNet (r) 3.0 (2006):

disapprobation
    n 1: an expression of strong disapproval; pronouncing as wrong
         or morally culpable; "his uncompromising condemnation of
         racism" [syn: disapprobation, condemnation] [ant:
         approbation]