/ Dictionary / Index O Orinda: Meaning and Definition of Find definitions for: O•rin•da Pronunciation: (u-rin'du, ô-rin'-, ō-rin'-), [key] — n. a town in W California. 16,825. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. orinasal O-ring Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language