/ Dictionary / Index B Boniface I: Meaning and Definition of Find definitions for: Boniface I Pronunciation: [key] died a.d. 422, pope 418–422. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Boniface Boniface II 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