/ Dictionary / Index J JFK: Meaning and Definition of Find definitions for: JFK Pronunciation: [key] John Fitzgerald Kennedy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jfk (Thesaurus) JF jg Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language