Prologue /(?)/

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.]

imp. & p. p. Prologued; p. pr. & vb. n. Prologuing

1. To introduce with a formal preface, or prologue. [R.]