noun
- A red or brown oxide coating on iron or steel caused by the action of oxygen and moisture.
- A plant disease that produces a reddish-brown discoloration of leaves and stems; caused by various rust fungi.
- The formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water.
- synonyms: rusting
- Any of various fungi causing rust disease in plants.
- synonyms: rust fungus
verb
- Become destroyed by water, air, or a corrosive such as an acid.
- usage: "The metal corroded"; "The pipes rusted"
- synonyms: corrode
- Cause to deteriorate due to the action of water, air, or an acid.
- usage: "The acid corroded the metal"; "The steady dripping of water rusted the metal stopper in the sink"
- Become coated with oxide.
adjective
- Of the brown color of rust.
- synonyms: rusty, rust-brown