Thesaurus: rust

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1. n. The reddish yellow coating formed on iron when exposed to moist air, consisting of ferric oxide or hydroxide; hence, by extension, any metallic film of corrosion.
2. n. A minute mold or fungus forming reddish or rusty spots on the leaves and stems of cereal and other grasses (Trichobasis Rubigo-vera), now usually believed to be a form or condition of the corn mildew (Puccinia graminis). As rust, it has solitary reddish spores; as corn mildew, the spores are double and blackish.
3. n. That which resembles rust in appearance or effects.
4. n. A composition used in making a rust joint. See Rust joint, below.
5. n. Foul matter arising from degeneration; as, rust on salted meat.
6. n. Corrosive or injurious accretion or influence.
7. v. i. To contract rust; to be or become oxidized.
8. v. i. To be affected with the parasitic fungus called rust; also, to acquire a rusty appearance, as plants.
9. v. i. To degenerate in idleness; to become dull or impaired by inaction.
10. v. t. To cause to contract rust; to corrode with rust; to affect with rust of any kind.
11. v. t. To impair by time and inactivity.
12. adj. of the brown color of rust