/ Dictionary / Index J John I: Meaning and Definition of Find definitions for: John I Pronunciation: [key] died a.d. 526, Italian ecclesiastic: pope 523–526. (“the Great”) 1357–1433, king of Portugal 1385–1433. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. john John II Related Content Daily Word Quiz: reiterate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language