Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “rust”

See all translations

rust

noun [U] uk   /rʌst/ us  
a reddish-brown substance that forms on the surface of iron and steel as a result of reacting with air and water: patches of rust a reddish-brown colour that looks like rust any of various plant diseases that cause reddish-brown spots
rust
adjective uk   us  
having a reddish-brown colour

rust

verb [I or T] uk   /rʌst/ us  
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.
Translations of “rust”
in Korean 녹…
in Arabic صَدَأ…
in French rouille…
in Turkish pas…
in Italian ruggine…
in Chinese (Traditional) 鏽, 鐵銹, 鐵銹色…
in Russian ржавчина…
in Polish rdza…
in Spanish óxido…
in Portuguese ferrugem…
in German der Rost…
in Catalan rovell…
in Japanese (金属の)さび…
in Chinese (Simplified) 锈, 铁锈, 铁锈色…
(Definition of rust from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of rust?
Add Cambridge dictionaries to your browser to your website

Definitions of “rust” in other dictionaries

Word of the Day

baby

a very young child, especially one that has not yet begun to walk or talk

Word of the Day

The way we move (Verbs for walking and running)

by Kate Woodford,
March 25, 2015
​​​ This week we’re looking at interesting ways to describe the way that people move. Most of the verbs that we’ll be considering describe how fast or slow people move. Others describe the attitude or state of mind of the person walking or running. Some describe both. Starting with verbs for walking slowly,

Read More 

stackin’ p

March 30, 2015
idiom slang earning a lot of money ‘That’s a very generous present.”Yeah, well, she’s stackin’ p, innit?’

Read More