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