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English definition of “unheard-of”

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unheard-of

adjective uk   /ʌnˈhɜːd.ɒv/ us    /-ˈhɝːd.ɑːv/
surprising or shocking because not known about or previously experienced: It was unheard-of for an unmarried couple to live together.
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 Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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