rust

Pronunciation

• IPA ^(key): /rʌst/

• Audio (US)

  (file)

Noun

Singular rust

Plural rusts

Rust on a wire.

1. (uncountable) Rust is a reddish material that forms on metal objects when in contact with moisture.

   The car had a little rust, but it was generally in good shape.

2. (uncountable) Rust is a plant disease caused by fungus.

Related words

• rusty

Verb

Plain form rust

Third-person singular rusts

Past tense rusted

Past participle rusted

Present participle rusting

1. (intransitive) If metal rusts, it gets covered in rust.

   She painted the metal pole to stop it from rusting.