/ Dictionary / Index I indefensible: Meaning and Definition of Find definitions for: in•de•fen•si•ble Pronunciation: (in"di-fen'su-bul), [key] — adj. not justifiable; inexcusable: indefensible behavior. incapable of being protected or defended against attack: an indefensible town. incapable of being defended against criticism or denial; untenable: indefensible argument. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: indefensible (Thesaurus) indefectible indefinable Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language