from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The fact, quality, or state of being certain: the certainty of death.
  • n. Something that is clearly established or assured: "On the field of battle there are no certainties” ( Tom Clancy).

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The state of being certain.
  • n. An instance of being certain.

from the GNU version of the Collaborative International Dictionary of English

  • n. The quality, state, or condition, of being certain.
  • n. A fact or truth unquestionable established.
  • n. Clearness; freedom from ambiguity; lucidity.

from The Century Dictionary and Cyclopedia

  • n. The quality or fact of being certain, fixed, determinate, or sure; the possession, as by a judgment or proposition, of certain marks which place it in the class of true propositions; exemption from failure or liability to fail; infallibility; inevitability: as, the certainty of an event, or of the success of a remedy.
  • n. A clearly established fact, truth, or state; that which is positively ascertained, demonstrated, or intuitively known, or which cannot be questioned.
  • n. That which is sure to be or occur; an assured event or result; an unerring forecast.
  • n. Full assurance of mind; exemption from doubt; certitude.
  • n. Same as certain, 3.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the state of being certain
  • n. something that is certain


from Wiktionary, Creative Commons Attribution/Share-Alike License

Middle English surety, from Anglo-Norman certeinté, from Old French certeineté, from Vulgar Latin *certanitas, from Latin certus



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