/ Dictionary / Index B byrrus: Meaning and Definition of Find definitions for: byr•rus Pronunciation: (bir'us), [key] — pl. byr•ri birrus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Byronic byssinosis Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language