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Definition unbeknown in British English

unbeknown adjective

adjective
/ˌʌnbɪˈnəʊn/
/ˌʌnbɪˈnəʊnst/
1

without someone’s knowledge

Example

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

Synonyms and related words
Definition unbeknown in British English