Definition of rusty adjective from the Oxford Advanced American Dictionary

     

    rusty

     adjective
    adjective
    NAmE//ˈrʌsti//
     
    (rustier, rustiest)
     
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  1. 1covered with rust rusty metal a rusty old car
  2. 2[not usually before noun] (informal) (of a sport, skill, etc.) not as good as it used to be, because you have not been practicing My tennis is very rusty these days. I haven't played the piano for ages—I may be a little rusty.
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: rusty