/ Dictionary / Index O orarium: Meaning and Definition of Find definitions for: o•rar•i•um Pronunciation: (u-râr'ē-um), [key] — pl. o•rar•i•a orarion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. orarion orate Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language