/ Dictionary / Index R RTF: Meaning and Definition of Find definitions for: RTF Pronunciation: [key] resistance transfer factor. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rte. Rt. Hon. 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