/ Dictionary / Index O otiose: Meaning and Definition of Find definitions for: o•ti•ose Pronunciation: (ō'shē-ōs", ō'tē-), [key] — adj. being at leisure; idle; indolent. ineffective or futile. superfluous or useless. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: otiose (Thesaurus) otic vesicle Otis Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language