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

 

rust

 verb
verb
BrE BrE//rʌst//
 
; NAmE NAmE//rʌst//
 
Verb Forms present simple I / you / we / they rust
BrE BrE//rʌst//
 
; NAmE NAmE//rʌst//
 
he / she / it rusts
BrE BrE//rʌsts//
 
; NAmE NAmE//rʌsts//
 
past simple rusted
BrE BrE//ˈrʌstɪd//
 
; NAmE NAmE//ˈrʌstɪd//
 
past participle rusted
BrE BrE//ˈrʌstɪd//
 
; NAmE NAmE//ˈrʌstɪd//
 
-ing form rusting
BrE BrE//ˈrʌstɪŋ//
 
; NAmE NAmE//ˈrʌstɪŋ//
 
 
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[intransitive, transitive] if metal rusts or something rusts it, it becomes covered with rust synonym corrode old rusting farming implements Brass doesn't rust. The floor of the car had rusted through. rust something Water had got in and rusted the engine. Word Origin Old English rūst, of Germanic origin; related to Dutch roest, German Rost, also to red. Phrasal Verbsrust away
See the Oxford Advanced American Dictionary entry: rust

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