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



    BrE BrE//ɪmˈprɒbəbl//
    ; NAmE NAmE//ɪmˈprɑːbəbl//
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  1. 1not likely to be true or to happen synonym unlikely an improbable story It all sounded highly improbable. improbable that… It seems improbable that the current situation will continue. opposite probable
  2. 2seeming strange because it is not what you would expect synonym unexpected Her hair was an improbable shade of yellow.
  3. Word Originlate 16th cent.: from French, or from Latin improbabilis ‘hard to prove’, from in- ‘not’ + probabilis, from probare ‘to test, demonstrate’.Extra examples These new facts make the theory improbable. a wildly improbable idea It seemed improbable that the fine weather would continue. The whole story sounded highly improbable.
See the Oxford Advanced American Dictionary entry: improbable