Source : Webster's Revised Unabridged Dictionary (1913)

Contemptuous \Con*temp"tu*ous\ (?; 135), a.
   Manifesting or expressing contempt or disdain; scornful;
   haughty; insolent; disdainful.

         A proud, contemptuous behavior.          --Hammond.

         Savage invective and contemptuous sarcasm. --Macaulay.

         Rome . . . entertained the most contemptuous opinion of
         the Jews.                                --Atterbury.

   Syn: Scornful; insolent; haughty; disdainful; supercilious;
        insulting; contumelious.

   Usage: {Contemptuous}, {Contemptible}. These words, from
          their similarity of sound, are sometimes erroneously
          interchanged, as when a person speaks of having ``a
          very contemptible opinion of another.'' Contemptible
          is applied to that which is the object of contempt;
          as, contemptible conduct; acontemptible fellow.
          Contemptuous is applied to that which indicates
          contempt; as, a contemptuous look; a contemptuous
          remark; contemptuous treatment. A person, or whatever
          is personal, as an action, an expression, a feeling,
          an opinion, may be either contemptuous or
          contemptible; a thing may be contemptible, but can not
          be contemptuous.

Source : WordNet®

contemptuous
     adj : expressing extreme contempt [syn: {disdainful}, {insulting},
            {scornful}]