/ Dictionary / Index J John IV: Meaning and Definition of Find definitions for: John IV Pronunciation: [key] died a.d. 642, pope 640–642. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. John III John V Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language