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]  /rʌst/ us  
a red-brown substance that forms on the surface of iron and steel as a result of decay caused by reacting with air and water
rust
verb [I/T]  /rʌst/ us  
[I] Stainless steel won’t rust.
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 Academic Content Dictionary © 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

justice

fairness in the way people are dealt with

Word of the Day

A certain je ne sais quoi: French words and phrases used in English

by Liz Walter,
January 21, 2015
It is an odd irony that the more sophisticated your use of English is, the more likely you are to use French words and phrases. Or, to be more accurate, ones you know to be French – words such as ballet, au pair, abattoir, fiancé, café, and restaurant are so entrenched in

Read More 

flower beard noun

January 19, 2015
a beard adorned with flowers And some of said beard-rockers are even turning it up a notch, painting trend on top of trend with what’s come to be known as ‘the flower beard.’

Read More