unbeknown meaning and definition

UNBEKNOWN adjective

Definition of unbeknown (adjective)

1. (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"
   • synonyms: unbeknownst

UNBEKNOWN adverb

Definition of unbeknown (adverb)

1. without someone's knowledge
   • "unbeknownst to me, she made all the arrangements"
   • synonyms: unbeknownst