/ Dictionary / Index R RFI: Meaning and Definition of Find definitions for: RFI Pronunciation: [key] radio frequency interference. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. RFE RFLP Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language