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English definition of “unbelievable”

unbelievable

adjective (UNLIKELY)    /ˌʌn.bɪˈliː.və.bl̩/
B2 unable to be believed because unlikely: I found most of the characters in the play totally unbelievable.Not believable
(Definition of unbelievable adjective (UNLIKELY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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