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Dictionary definition for: Rust

1. (n) a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture

2. (v) become destroyed by water, air, or an etching chemical such as an acid; "The metal corroded" "The pipes rusted"

3. (s) of the color of rust

4. (n) a reddish-brown discoloration of leaves and stems caused by a rust fungus

5. (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"

6. (n) the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water

7. (v) become coated with oxide

8. (n) any of various fungi causing rust disease in plants

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