[n] any of various fungi causing rust disease in plants
[n] the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
[n] a reddish-brown discoloration of leaves and stems caused by a rust fungus
[n] a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture
[adj] of the color of rust
[v] become coated with oxide
[v] become destroyed by water, air, or an etching chemical such as an acid; "The metal corroded"; "The pipes rusted"
[v] cause to deteriorate due to the action of water, air, or an acid; "The acid corroded the metal"; "The steady dripping of water rusted the metal stopper in the sink"