unbelievable Meaning in the Cambridge English Dictionary
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Meaning of “unbelievable” in the English Dictionary

"unbelievable" in British English

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unbelievableadjective

uk   us   /ˌʌn.bɪˈliː.və.bl̩/

unbelievable adjective (SURPRISING)

B1 extremelysurprising: She ​eats an unbelievable ​amount of ​food. You've had such ​badluck it's unbelievable. You should ​see her ​wardrobe - it's unbelievable - she's got about 50 ​pairs of ​shoes.
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unbelievable adjective (UNLIKELY)

B2 unable to be ​believed because ​unlikely: I ​thought most of the ​characters in the ​play were ​totally unbelievable.
(Definition of unbelievable from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"unbelievable" in American English

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unbelievableadjective

 us   /ˌʌn·bɪˈli·və·bəl/

unbelievable adjective (SURPRISING)

[not gradable] extremelysurprising: That little ​dogeats an unbelievable ​amount of ​food.

unbelievable adjective (UNLIKELY)

not ​able to be ​believed because ​unlikely: an unbelievable ​story/​excuse unbelievable ​luck
unbelievably
adverb [not gradable]  us   /ˌʌn·bɪˈli·və·bli/
It was unbelievably ​stupid of you to go.
(Definition of unbelievable from the Cambridge Academic Content Dictionary © Cambridge University Press)
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