vt to impair by time and inactivity.
2. rust ·vi to contract rust; to be or become oxidized.
3. rust ·noun corrosive or injurious accretion or influence.
4. rust ·noun that which resembles rust in appearance or effects.
5. rust ·noun foul matter arising from degeneration; as, rust on salted meat.
6. rust ·noun a composition used in making a rust joint. ·see rust joint, below.
7. rust ·vi to degenerate in idleness; to become dull or impaired by inaction.
8. rust ·vt to cause to contract rust; to corrode with rust; to affect with rust of any kind.
9. rust ·vi to be affected with the parasitic fungus called rust; also, to acquire a rusty appearance, as plants.
10. rust ·noun 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.
11. rust ·noun 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.