Definition of incontestable adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌɪnkənˈtestəbl//
; NAmE NAmE//ˌɪnkənˈtestəbl//
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that is true and cannot be disagreed with or denied synonym indisputable an incontestable right/fact His claim to the land is incontestable. Word Originlate 17th cent.: from French, or from medieval Latin incontestabilis, from in- ‘not’ + contestabilis ‘able to be called upon in witness’, from the verb contestari (from con- ‘together’ + testare ‘to witness’).
See the Oxford Advanced American Dictionary entry: incontestable