/ Dictionary / Index O opposable: Meaning and Definition of Find definitions for: op•pos•a•ble Pronunciation: (u-pō'zu-bul), [key] — adj. capable of being placed opposite to something else: the opposable thumb of primates. capable of being resisted, fought, or opposed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: opposable (Thesaurus) opportunity oppose Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language