Source : Webster's Revised Unabridged Dictionary (1913)

Supplant \Sup*plant"\, v. t. [imp. & p. p. {Supplanted}; p. pr.
   & vb. n. {Supplanting}.] [F. supplanter, L. supplantare to
   trip up one's heels, to throw down; sub under + planta the
   sole of the foot, also, a sucker, slip, sprout. Cf. {Plant},
   n.]
   1. To trip up. [Obs.] ``Supplanted, down he fell.'' --Milton.

   2. To remove or displace by stratagem; to displace and take
      the place of; to supersede; as, a rival supplants another
      in the favor of a mistress or a prince.

            Suspecting that the courtier had supplanted the
            friend.                               --Bp. Fell.

   3. To overthrow, undermine, or force away, in order to get a
      substitute in place of.

            You never will supplant the received ideas of God.
                                                  --Landor.

   Syn: To remove; displace; overpower; undermine; overthrow;
        supersede.

Source : WordNet®

supplanting
     n : act of taking the place of another especially using
         underhanded tactics [syn: {displacement}]