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the unknown

noun

Definition of the unknown

: a place, situation, or thing that is not known about or understood
  • explorers venturing off into the unknown
: a situation that one is unfamiliar with
  • A fear of the unknown kept her from changing jobs.

Word by Word Definitions

unknown play

  1. : not known or not well-known

  1. : one that is not known or not well-known

  2. : something that requires discovery, identification, or clarification: such as

  3. : a symbol (such as x, y, or z) in a mathematical equation representing an unknown quantity

See the full definition of unknown

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