Definitions
1.NounThe deteriorated state of iron or steel as a result of moisture and oxidation; it consists mostly of iron(III) oxide (ferric oxide) and iron(II) oxide (ferrous oxide)."The rust on my bicycle chain made cycling to work very dangerous."
2.NounA similar substance based on another metal."copper rust"
3.NounA reddish-brown color."rust: "
4.NounA disease of plants caused by a reddish-brown fungus (Pucciniales).
5.NounDamage caused to stamps and album pages by a fungal infection.
6.VerbTo oxidize, especially of iron or steel."The patio furniture had rusted in the wind-driven spray."
7.VerbTo cause to oxidize."The wind-driven spray had thoroughly rusted the patio furniture."
8.VerbTo be affected with the parasitic fungus called rust.
9.VerbTo (cause to) degenerate in idleness; to make or become dull or impaired by inaction.
10.VerbOf a black cat or its fur, to turn rust-coloured following long periods of exposure to sunlight."It's very common for black cats to rust during the summer."