- (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.
- (v.i.) To be affected with the parasitic fungus called rust; also, to acquire a rusty appearance, as plants.
- (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.
- (n.) That which resembles rust in appearance or effects.
- (n.) Foul matter arising from degeneration; as, rust on salted meat.
- (v.i.) To degenerate in idleness; to become dull or impaired by inaction.
- (n.) A composition used in making a rust joint. See Rust joint, below.
- (v.t.) To cause to contract rust; to corrode with rust; to affect with rust of any kind.
- (v.t.) To impair by time and inactivity.
- (v.i.) To contract rust; to be or become oxidized.
- (n.) Corrosive or injurious accretion or influence.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). rust. Retrieved September 21, 2026, from http://smartdefine.org/rust/definitions/2057128 |
| Chicago | Webster's. 2011. "rust" http://smartdefine.org/rust/definitions/2057128 (accessed September 21, 2026). |
| Harvard | Webster's 2011, rust, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/rust/definitions/2057128>. |
| MLA | Webster's. "rust" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/rust/definitions/2057128> |