/ Dictionary / Index B Boris III: Meaning and Definition of Find definitions for: Boris III Pronunciation: [key] 1894–1943, king of Bulgaria 1918–43. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Boris Boris Godunov* 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