Source : Webster's Revised Unabridged Dictionary (1913)

Worst \Worst\, v. t. [imp. & p. p. {Worsted}; p. pr. & vb. n.
   {Worsting}.] [See {Worse}, v. t. & a.]
   To gain advantage over, in contest or competition; to get the
   better of; to defeat; to overthrow; to discomfit.

         The . . . Philistines were worsted by the captivated
         ark.                                     --South.