Pref·ace n.
 1. Something spoken as introductory to a discourse, or written as introductory to a book or essay; a proem; an introduction, or series of preliminary remarks.
 This superficial tale
 Is but a preface of her worthy praise.   --Shak.
    Heaven's high behest no preface needs.   --Milton.
 2. R. C. Ch. The prelude or introduction to the canon of the Mass.
 Proper preface Ch. of Eng. & Prot. Epis. Ch., a portion of the communion service, preceding the prayer of consecration, appointed for certain seasons.
 Syn: -- Introduction; preliminary; preamble; proem; prelude; prologue.