rusted meaning
Wiktionary(0.00 / 0 votes)Rate this definition: 1  rust(Noun) The deteriorated state of iron or steel as a result of moisture and oxidation. The rust on my bicycle chain made cycling to work very dangerous. 2  rust(Noun) A disease of plants caused by a reddish-brown fungus. 3  rust(Verb) to oxidize, especially of iron or steel.