unheard-of Meaning in Cambridge American English Dictionary
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Meaning of "unheard-of" - American English Dictionary

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unheard-ofadjective

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