- 1preface something (with something) to provide a book or other piece of writing with a preface He prefaced the diaries with a short account of how they were discovered. Each chapter is prefaced by a quotation from Shakespeare.
- 2preface something by/with something preface something by doing something (formal) to say something before you start making a speech, answering a question, etc. I must preface my remarks with an apology.
NAmE//ˈprɛfəs//Verb Forms present simple I / you / we / they preface
he / she / it prefaces
past simple prefaced
-ing form prefacing