1.a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture
2.a reddish-brown discoloration of leaves and stems caused by a rust fungus
3.the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
4.any of various fungi causing rust disease in plants
5.of the color of rust
1.become destroyed by water, air, or an etching chemical such as an acid;
The metal corroded
2.cause to deteriorate due to the action of water, air, or an acid;
The acid corroded the metal
3.become coated with oxide