/ Dictionary / Index O OPM: Meaning and Definition of Find definitions for: OPM Pronunciation: [key] Office of Personnel Management. operations per minute. other people's money. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Opium War Oporto Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language