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