/ Dictionary / Index O ossuarium: Meaning and Definition of Find definitions for: os•su•ar•i•um Pronunciation: (osh"-âr'ē-um, os"-), [key] — pl. -ar•i•a ossuary. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ossobuco ossuary Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language