Source : Webster's Revised Unabridged Dictionary (1913)

Overreach \O"ver*reach`\, n.
   The act of striking the heel of the fore foot with the toe of
   the hind foot; -- said of horses.

Overreach \O`ver*reach"\, v. t. [imp. & p. p. {Overreached},
   ({Overraught}, obs.); p. pr. & vb. n. {Overreaching}.]
   1. To reach above or beyond in any direction.

   2. To deceive, or get the better of, by artifice or cunning;
      to outwit; to cheat. --Shak.

Overreach \O`ver*reach"\, v. i.
   1. To reach too far; as:
      (a) To strike the toe of the hind foot against the heel or
          shoe of the forefoot; -- said of horses.
      (b) (Naut.) To sail on one tack farther than is necessary.
          --Shak.

   2. To cheat by cunning or deception.

Source : WordNet®

overreach
     v 1: fail by aiming too high or trying too hard
     2: beat through cleverness and wit; "I beat the traffic"; "She
        outfoxed her competitors" [syn: {outwit}, {outsmart}, {outfox},
         {beat}, {circumvent}]