unbeknownst Meaning, Definition & Usage

  1. adjective satellite (usually used with `to') occurring or existing without the knowledge of
    unbeknown.
    • a crisis unbeknown to me
    • she had been ill for months, unbeknownst to the family
  2. adverb without someone's knowledge
    unbeknown.
    • unbeknownst to me, she made all the arrangements

WordNet