/ Dictionary / Index O Orillia: Meaning and Definition of Find definitions for: O•ril•lia Pronunciation: (ô-ril'yu, ō-ril'-), [key] — n. a city in SE Ontario, in S Canada. 23,955. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. orihon orinasal Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language