Definition of the unthinkable noun from the Oxford Advanced Learner's Dictionary


the unthinkable

BrE BrE//ði ˌʌnˈθɪŋkəbl//
; NAmE NAmE//ði ˌʌnˈθɪŋkəbl//
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a thing that is impossible to imagine or accept Suddenly the unthinkable happened and he drew out a gun. The time has come to think the unthinkable (= consider possibilities that used to be unacceptable).