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

     

    nastiness

     noun
    noun
    BrE BrE//ˈnɑːstinəs//
     
    ; NAmE NAmE//ˈnæstinəs//
     
    [uncountable]
     
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  1. 1unkind or unpleasant behaviour or comments synonym meanness the sheer nastiness of their attitude
  2. 2the fact of being very bad, unpleasant or dangerous Life for many people at that time was chiefly made up of grime, dirt, disease and general nastiness.