/ Dictionary / Index R R.B.I.: Meaning and Definition of Find definitions for: R.B.I. Pronunciation: [key] — Baseball. Baseball. run batted in; runs batted in. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rbi (Thesaurus) RBC R.C. Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language