Definition of uncertainty noun from the Oxford Advanced Learner's Dictionary

     

    uncertainty

     noun
    noun
    BrE BrE//ʌnˈsɜːtnti//
     
    ; NAmE NAmE//ʌnˈsɜːrtnti//
     
    (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
  3. Extra examples Considerable uncertainty remains about this approach. Her comments will add to the uncertainty of the situation. Her comments will add uncertainty to an already complicated situation. Her expression showed her uncertainty. I expressed some uncertainty on the point. It still leaves us with fundamental uncertainties about why the famine happened. One area of uncertainty remains: who will lead the team? Some uncertainty still exists about the safety of the new drug. The 1990s were a period of high uncertainty for businesses. The economy became a source of uncertainty and discontent. There is considerable uncertainty in our understanding of global warming. There’s considerable uncertainty as to whether the government’s job creation strategies will work. They are facing some uncertainty about their jobs. This will remove any uncertainties regarding possible contamination. a climate of global economic uncertainty a feeling of uncertainty about his future the inherent uncertainty in economic and budgetary forecasts the uncertainty surrounding the proposed changes in the law uncertainty over the safety of the drug All of us are a bit afraid of life’s uncertainties and unexpected problems. She tried to get on with her life amidst the uncertainties of war. There is considerable uncertainty about the company’s future.
See the Oxford Advanced American Dictionary entry: uncertainty