| a. | 1. | Covered or affected with rust; |
| 2. | Impaired by inaction, disuse, or neglect. | |
| 3. | Discolored and rancid; reasty; | |
| 4. | Surly; morose; crusty; sullen. | |
| 5. | Rust-colored; dark. | |
| 6. | Discolored; stained; not cleanly kept; filthy. | |
| 7. | (Bot.) Resembling, or covered with a substance resembling, rust; affected with rust; rubiginous. |
| Adj. | 1. | rusty - covered with or consisting of rust; "a rusty machine"; "rusty deposits" |
| 2. | rusty - of the color of rust Synonyms: rust | |
| 3. | rusty - impaired in skill by neglect Synonyms: out of practice | |
| 4. | rusty - ancient; "hoary jokes" Synonyms: hoary |