/ Dictionary / Index R rpm: Meaning and Definition of Find definitions for: rpm Pronunciation: [key] revolutions per minute. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rpm (Thesaurus) RPG R.P.O. Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language