What is the meaning of unknown?


  • An unknown and unexplored region.
    • usage: "they came like angels out the unknown"
  • Anyone who does not belong in the environment in which they are found.
  • A variable whose values are solutions of an equation.


  • Not known.
    • usage: "an unknown amount"; "an unknown island"; "an unknown writer"; "an unknown source"
  • Being or having an unknown or unnamed source.
    • usage: "a poem by an unknown author"; "corporations responsible to nameless owners"; "an unnamed donor"
  • Not known to exist.
    • usage: "things obscurely felt surged up from unknown depths"
  • Not famous or acclaimed.
    • usage: "an obscure family"; "unsung heroes of the war"
  • Not known before.
    • usage: "used many strange words"; "saw many strange faces in the crowd"; "don't let anyone unknown into the house"
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APAWordNet. (2010). unknown. Retrieved November 25, 2015, from http://smartdefine.org/unknown/definitions/1186854
ChicagoWordNet. 2010. "unknown" http://smartdefine.org/unknown/definitions/1186854 (accessed November 25, 2015).
HarvardWordNet 2010, unknown, Smart Define, viewed 25 November, 2015, <http://smartdefine.org/unknown/definitions/1186854>.
MLAWordNet. "unknown" 23 October 2010. Web. 25 November 2015. <http://smartdefine.org/unknown/definitions/1186854>
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