Webster's Revised Unabridged Dictionary · 1913

Rusty

Rusty , adjective

[Anglo-Saxon rustig.]

1.
Covered or affected with rust; as, a rusty knife or sword; rusty wheat.
2.
Impaired by inaction, disuse, or neglect.
[Hector,] in this dull and long-continued truce, Is rusty grown. — Shakespeare
3.
Discolored and rancid; reasty; as, rusty bacon.
4.
Surly; morose; crusty; sullen. [Obsolete or Provincial English]
Rusty words. — Piers Plowman
5.
Rust-colored; dark.
Rusty blood. — Spenser
6.
Discolored; stained; not cleanly kept; filthy.
The rusty little schooners that bring firewood from the British provinces. — Hawthorne
7.
(Botany) Resembling, or covered with a substance resembling, rust; affected with rust; rubiginous.