\Pro"logue\, n. [F., fr. L. prologus, fr. Gr. ?, fr. ?
to say beforehand; ? before + ? to say. See {Logic}.]
1. The preface or introduction to a discourse, poem, or
   performance; as, the prologue of Chaucer's ``Canterbury
   Tales;'' esp., a discourse or poem spoken before a
   dramatic performance
2. One who delivers a prologue. [R.] --Shak.

\Pro"logue\, v. t. [imp. & p. p. {Prologued}; p. pr. &
vb. n. {Prologuing}.]
To introduce with a formal preface, or prologue. [R.] --Shak.