/ Dictionary / Index B Boniface III: Meaning and Definition of Find definitions for: Boniface III Pronunciation: [key] pope a.d. 607. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Boniface II Boniface IV Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language