The Collaborative International Dictionary of English v.0.48:

Disparagement \Dis*par"age*ment\, n. [Cf. OF. desparagement.]
   1. Matching any one in marriage under his or her degree;
      injurious union with something of inferior excellence; a
      lowering in rank or estimation. [Eng.]
      [1913 Webster]

            And thought that match a foul disparagement.
                                                  --Spenser.
      [1913 Webster]

   2. Injurious comparison with an inferior; a depreciating or
      dishonoring opinion or insinuation; diminution of value;
      dishonor; indignity; reproach; disgrace; detraction; --
      commonly with to.
      [1913 Webster]

            It ought to be no disparagement to a star that it is
            not the sun.                          --South.
      [1913 Webster]

            Imitation is a disparagement and a degradation in a
            Christian minister.                   --I. Taylor.

   Syn: Indignity; derogation; detraction; reproach; dishonor;
        debasement; degradation; disgrace.
        [1913 Webster]

WordNet (r) 3.0 (2006):

disparagement
    n 1: a communication that belittles somebody or something [syn:
         disparagement, depreciation, derogation]
    2: the act of speaking contemptuously of [syn: disparagement,
       dispraise]