unheard-of Meaning in the Cambridge English Dictionary
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Meaning of “unheard-of” in the English Dictionary

"unheard-of" in British English

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unheard-ofadjective

uk   /ʌnˈhɜːd.ɒv/  us   /-ˈhɝːd.ɑːv/
surprising or ​shocking because not ​known about or ​previouslyexperienced: It was unheard-of for an ​unmarriedcouple to ​live together.
(Definition of unheard-of from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"unheard-of" in American English

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unheard-ofadjective

 us   /ʌnˈhɜrdˌʌv, -ˌɑv, -əv/
surprising or ​shocking because not ​known about or ​previouslyexperienced: Price ​wars have ​slicedprices to unheard-of ​lows.
(Definition of unheard-of from the Cambridge Academic Content Dictionary © Cambridge University Press)
Translations of “unheard-of”
in Chinese (Simplified) 令人震惊的, 前所未闻的,空前的…
in Chinese (Traditional) 令人震驚的, 前所未聞的,空前的…
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