1. (a.) Not deniable; incapable of denial; palpably true; indisputable; obvious; as, undeniable evidence.

2. (a.) Unobjectionable; unquestionably excellent; as, a person of undeniable connections.

absolute actual admitting no question arrant authentic classical complete confirmable consummate crass de facto decided definitive demonstrable demonstratable downright egregious factual flagrant for real genuine glaring gross historical honest-to-God inappealable incontestable incontrovertible indisputable indubitable intolerable irrefragable irrefutable out-and-out outright perfect positive precious profound pronounced proper provable rank real regular self-evident shattering shocking stark stark-staring substantial superlative surpassing testable the veriest thorough thoroughgoing total TRUE unanswerable unbearable unconfutable unconscionable unequivocal unimpeachable unmitigated unqualified unquestionable unrefutable unrelieved unspoiled utter verifiable veritable