(1):
(v. t.) To introduce by a preface; to give a preface to; as, to preface a book discourse.
(2):
(v. i.) To make a preface.
(3):
(n.) The prelude or introduction to the canon of the Mass.
(4):
(n.) 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.