Breadcrumb Home > Dictionary > Index D defeasible: Meaning and Definition of Find definitions for: de•fea•si•ble Pronunciation: (di-fē'zu-bul), [key] — adj. capable of being annulled or terminated. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: defeasible (Thesaurus) defease defeat ✖ Related Content Daily Word Quiz: ultimathule Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language