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English definition of “rust”

rust

verb [I or T]     /rʌst/
to become or cause something to become covered with rust: Older cars will begin to rust. Years of being left out in the rain had rusted the metal chairs. The floor of the car had rusted away/through (= been destroyed by rust), so I was careful where I put my feet.Physical and chemical processes
(Definition of rust verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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