Source : Webster's Revised Unabridged Dictionary (1913)

Disprove \Dis*prove"\, v. t. [imp. & p. p. {Disproved}; p. pr. &
   vb. n. {Disproving}.] [Pref. dis- + prove: cf. OF.
   desprover.]
   1. To prove to be false or erroneous; to confute; to refute.

            That false supposition I advanced in order to
            disprove it.                          --Atterbury.

   2. To disallow; to disapprove of. [Obs.] --Stirling.

Source : WordNet®

disprove
     v : prove to be false; "The physicist disproved his colleagues'
         theories" [syn: {confute}] [ant: {prove}]