/ Dictionary / Index P pref.: Meaning and Definition of Find definitions for: pref. Pronunciation: [key] preface. prefaced. prefatory. preference. preferred. prefix. prefixed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. preexposure prefab Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language