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Noun: uncertainty  ,ún'sur-t(u)n-tee
  1. Being unsettled or in doubt or dependent on chance
    "the uncertainty of the outcome";
    - uncertainness, precariousness
  2. The state of being unsure of something
    - doubt, incertitude, dubiety, doubtfulness, dubiousness

Derived forms: uncertainties

Type of: cognitive state, quality, state of mind

Antonym: certainty

Encyclopedia: Uncertainty, Evolution, and Economic Theory