Source : Webster's Revised Unabridged Dictionary (1913)

Overmatch \O`ver*match"\, v. t.
   1. To be more than equal to or a match for; hence, to
      vanquish. --Drayton.

   2. To marry (one) to a superior. [Obs.] --Burton.

Overmatch \O"ver*match`\, n.
   One superior in power; also, an unequal match; a contest in
   which one of the opponents is overmatched. --Milton. D.
   Webster.