/ Dictionary / Index B bullarium: Meaning and Definition of Find definitions for: bul•lar•i•um Pronunciation: (boo-lâr'ē-um), [key] — pl. -lar•i•a a collection of papal bulls. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bull ant bullary 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