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Definition of rust noun from the Oxford Advanced American Dictionary

     

    rust

     noun
    noun
    NAmE//rʌst//
     
    [uncountable]
     
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  1. 1a red-brown substance that is formed on some metals by the action of water and air pipes covered with rust rust spots a rust-colored dress see rusty
  2. 2a plant disease that causes red-brown spots; the fungus that causes this disease
See rust in the Oxford Advanced Learner's Dictionary
Check pronunciation: rust

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