Available Definitions:
1) superl. - Covered or affected with rust; as, a rusty knife or sword; rusty wheat.
2) superl. - Impaired by inaction, disuse, or neglect.
3) superl. - Discolored and rancid; reasty; as, rusty bacon.
4) superl. - Surly; morose; crusty; sullen.
5) superl. - Rust-colored; dark.
6) superl. - Discolored; stained; not cleanly kept; filthy.
7) superl. - Resembling, or covered with a substance resembling, rust; affected with rust; rubiginous.