'Incontestable' definitions:

Definition of 'incontestable'

From: WordNet
adjective
Incapable of being contested or disputed [syn: incontestable, incontestible] [ant: contestable]
adjective
Not open to question; obviously true; "undeniable guilt"; "indisputable evidence of a witness" [syn: incontestable, indisputable, undisputable]

Definition of 'Incontestable'

From: GCIDE
  • Incontestable \In`con*test"a*ble\, a. [Pref. in- not + contestable: cf. F. incontestable.] Not contestable; not to be disputed; that cannot be called in question or controverted; incontrovertible; indisputable; as, incontestable evidence, truth, or facts. --Locke.
  • Syn: Incontrovertible; indisputable; irrefragable; undeniable; unquestionable; intuitable; certain. -- {In`con*test"a*ble*ness}, n. -- {In`con*test"a*bly}, adv. [1913 Webster]