rust

Sense 1 noun

a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture

Sense 2 verb

become destroyed by water, air, or a corrosive such as an acid

The metal corroded

Sense 3 adjective

of the brown color of rust

Sense 4 noun

a plant disease that produces a reddish-brown discoloration of leaves and stems; caused by various rust fungi

Sense 5 verb

cause to deteriorate due to the action of water, air, or an acid

The acid corroded the metal

Sense 6 noun

the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water

Sense 7 verb

become coated with oxide

Sense 8 noun

any of various fungi causing rust disease in plants