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