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



    BrE BrE//rʌst//
    ; NAmE NAmE//rʌst//
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  1. 1a reddish-brown substance that is formed on some metals by the action of water and air pipes covered with rust rust spots a rust-coloured dress The lock was covered with rust. The old padlock was red with rust. see also rusty
  2. 2 a plant disease that causes reddish-brown spots; the fungus that causes this disease
  3. Word OriginOld English rūst, of Germanic origin; related to Dutch roest, German Rost, also to red.
See the Oxford Advanced American Dictionary entry: rust

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