What is the meaning of tautology?

noun

  • Logic) a statement that is necessarily true. (
    • usage: "the statement `he is brave or he is not brave' is a tautology"
  • Useless repetition.
    • usage: "to say that something is `adequate enough' is a tautology"
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). tautology. Retrieved September 20, 2026, from http://smartdefine.org/tautology/definitions/1218868
ChicagoWordNet. 2010. "tautology" http://smartdefine.org/tautology/definitions/1218868 (accessed September 20, 2026).
HarvardWordNet 2010, tautology, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/tautology/definitions/1218868>.
MLAWordNet. "tautology" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/tautology/definitions/1218868>
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