/ Dictionary / Index O osar: Meaning and Definition of Find definitions for: o•sar Pronunciation: (ō'sär), [key] — n. pl. of. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: osar (Thesaurus) Osaka Osasco Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language