Source : Webster's Revised Unabridged Dictionary (1913)

Impale \Im*pale"\, v. t. [imp. & p. p. {Impaled}; p. pr. & vb.
   n. {Impaling}.] [See 2d {Empale}.]
   1. To pierce with a pale; to put to death by fixing on a
      sharp stake. See {Empale}.

            Then with what life remains, impaled, and left To
            writhe at leisure round the bloody stake. --Addison.

   2. To inclose, as with pales or stakes; to surround.

            Impale him with your weapons round about. --Shak.

            Impenetrable, impaled with circling fire. --Milton.

   3. (Her.) To join, as two coats of arms on one shield,
      palewise; hence, to join in honorable mention.

            Ordered the admission of St. Patrick to the same to
            be matched and impaled with the blessed Virgin in
            the honor thereof.                    --Fuller.

Source : WordNet®

impale
     v 1: pierce with a sharp stake or point; "impale a shrimp on a
          skewer" [syn: {transfix}, {empale}, {spike}]
     2: kill by piercing with a spear or sharp pole; "the enemies
        were impaled and left to die" [syn: {stake}]