unknown Hear it!

unknown definition

un·known (-nōn′)

adjective

not known; specif.,
  1. not in the knowledge, understanding, or acquaintance of someone; unfamiliar (to)
  2. not discovered, identified, determined, explored, etc.

noun

  1. an unknown person or thing
  2. an unknown mathematical quantity: also, a symbol for this

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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