/ Dictionary / Index J John XXIII: Meaning and Definition of Find definitions for: John XXIII Pronunciation: [key] (Angelo Giuseppe Roncalli) 1881–1963, Italian ecclesiastic: pope 1958–63. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. John XXII John Barleycorn Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language