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

rust

noun
 
/rʌst/
 
/rʌst/
[uncountable]
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  1. a red-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
    Oxford Collocations Dictionaryverb + rust
    • get off
    • remove
    • scrape off
    rust + noun
    • spot
    • stain
    • remover
    phrases
    • covered with rust
    See full entry
  2. a plant disease that causes red-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 rust in the Oxford Advanced American Dictionary

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