American Dictionary

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Definition unbeknown in American English

unbeknown adjective

adjective
/ˌʌnbɪˈnoʊn/
/ˌʌnbɪˈnoʊnst/
1

without someone’s knowledge

Example

Unbeknown to the crew, a stowaway had crept on board.

Synonyms and related words
Definition unbeknown in American English