/ Dictionary / Index I incontestable: Meaning and Definition of Find definitions for: in•con•test•a•ble Pronunciation: (in"kun-tes'tu-bul), [key] — adj. not contestable; not open to dispute; incontrovertible: incontestable proof. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: incontestable (Thesaurus) inconsumable incontestable clause Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language