/ Dictionary / Index U unquestionable: Meaning and Definition of Find definitions for: un•ques•tion•a•ble Pronunciation: (un-kwes'chu-nu-bul), [key] — adj. not open to question; beyond doubt or dispute; indisputable; undeniable; certain: an unquestionable fact. above criticism; unexceptionable: a man of unquestionable principles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unquestionable (Thesaurus) unqualified unquestioned Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language