Noah Webster's Dictionary 1. (n.) 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. (n.) One who delivers a prologue. 3. (v. t.) To introduce with a formal preface, or prologue. Int. Standard Bible Encyclopedia PROLOGUE pro'-log, prol'-og (prologos, "foreword," "preface," "introduction"): The word occurs in the preface to Ecclesiasticus (Sirach), and is commonly applied to John 1:1-18. See ECCLESIASTICUS; JOHN, GOSPEL OF.