Source : Webster's Revised Unabridged Dictionary (1913)

Pie \Pie\, n. [F. pie, L. pica; cf. picus woodpecker, pingere to
   paint; the bird being perhaps named from its colors. Cf.
   {Pi}, {Paint}, {Speight}.]
   1. (Zo["o]l.)
      (a) A magpie.
      (b) Any other species of the genus {Pica}, and of several
          allied genera. [Written also {pye}.]

   2. (R. C. Ch.) The service book.

   3. (Pritn.) Type confusedly mixed. See {Pi}.

   {By cock and pie}, an adjuration equivalent to ``by God and
      the service book.'' --Shak.

   {Tree pie} (Zo["o]l.), any Asiatic bird of the genus
      {Dendrocitta}, allied to the magpie.

   {Wood pie}. (Zo["o]l.) See {French pie}, under {French}.