Happening or existing without the knowledge of a specified party.
(usually used with `to') occurring or existing without the knowledge of; "a crisis unbeknown to me"; "she had been ill for months, unbeknownst to the family"
without someone's knowledge; "unbeknownst to me, she made all the arrangements"
without someone''s knowledge; "unbeknownst to me, she made all the arrangements"
(usually used with `to') occurring or existing without the knowledge of