/ Dictionary / Index I Innocent IV: Meaning and Definition of Find definitions for: Innocent IV Pronunciation: [key] — (Sinbaldo de Fieschi) c1180–1254, Italian ecclesiastic: pope 1243–54. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Innocent III Innocent V Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language