Breadcrumb Home > Dictionary > Index F FYI: Meaning and Definition of Find definitions for: FYI Pronunciation: [key] for your information. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fyce fyke ✖ Related Content Daily Word Quiz: sophism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language