Meaning of “unthinkable” in the English Dictionary

american-english dictionary

"unthinkable" in British English

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(Definition of “unthinkable” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"unthinkable" in American English

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unthinkableadjective

us /ʌnˈθɪŋ·kə·bəl/

too shocking or unlikely to be imagined as possible:

A world without music would be unthinkable.

Idiom(s)

the unthinkable

something that is very unlikely or undesirable:

The president’s car did the unthinkable – it stopped at a red light.

(Definition of “unthinkable” from the Cambridge Academic Content Dictionary © Cambridge University Press)