Pronunciation: (rus'tē),[key] —adj.,rust•i•er, rust•i•est. 1. covered with or affected by rust.
2. consisting of or produced by rust.
3. of or tending toward the color rust; rust-colored.
4. faded or shabby; impaired by time or wear, as clothes or drapery.
5. impaired through disuse or neglect: My Latin is rusty. 6. having lost agility or alertness; out of practice: I am a bit rusty at tennis. 7. (of a sound) grating or harsh.