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Definition of uncertainty noun from the Oxford Advanced American Dictionary

     

    uncertainty

     noun
    noun
    NAmE//ʌnˈsərtnti//
     
    (pl. uncertainties)
     
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  1. 1[uncountable] the state of being uncertain There is considerable uncertainty about the company's future. He had an air of uncertainty about him.
  2. 2[countable] something that you cannot be sure about; a situation that causes you to be or feel uncertain life's uncertainties the uncertainties of war
See the Oxford Advanced Learner's Dictionary entry: uncertainty