The Collaborative International Dictionary of English v.0.48:
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.
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.