/ Dictionary / Index P proem: Meaning and Definition of Find definitions for: pro•em Pronunciation: (prō'em), [key] — n. an introductory discourse; introduction; preface; preamble. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. product mark proenzyme Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language