Definition of unknown

Definition of unknown
  1. unknown Adjective Not known; unidentified; not well known.
  2. unknown Noun A variable (usually "x", "y" or "z") whose value is to be found.
  3. unknown Noun Any fact or place about which nothing is known (as in the phrase "into the unknown").
  4. unknown Noun A person of no identity; a nonentity
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