rust Definition

rust
noun

1. A reddish-brown coating that forms on the surface of iron or steel that has been exposed to air and moisture.
2. A similar coating which forms on other metals.
3. The colour of rust, usually a reddish-brown.
4a. A parasitic fungus that causes a serious disease of cereals and other crops, characterized by the appearance of reddish-brown patches on the leaves and other surfaces of infected plants;
4b. The disease caused by such a fungus, which may result in serious economic losses as it affects important cereal crops, such as wheat.

verb rusted, rusting

intr
1. To become rusty or coated with rust.

Thesaurus: oxidize, deteriorate, corrode, decay, tarnish.
2. To make something rusty.
intr
3. To become weaker, inefficient etc, usually through lack of use.

adj

1. Reddish-brown, of the colour of rust.

Thesaurus: russet, auburn, ginger, chestnut, copper, tawny.

Derivative: rusted
adj

Derivative: rusting
noun, adj

Etymology: Anglo-Saxon.