/ Dictionary / Index R rmdr: Meaning and Definition of Find definitions for: rmdr Pronunciation: [key] remainder. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. R.M.C. rms Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language