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

     

    rustiness

     noun
    noun
    BrE BrE//ˈrʌstinəs//
     
    ; NAmE NAmE//ˈrʌstinəs//
     
    [uncountable]
     
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  1. 1the state of being covered with rust (1) the rustiness of the metal
  2. 2(informal) the state of not being as good as you used to be at a sport, skill, etc. because you have not been practising He showed some rustiness in his first match since January.