English

Adjective

1. Resistant to rust, oxidation and corrosion.

   This is supposed to be a rustproof trashcan, but it can't handle the salt they use on our roads.

Verb

1. To make resistant to rust, such as by applying a coating.

   We'll rustproof the metal with a good coat of paint and then we'll be able to leave it outdorrs for years without damage.