Covered or affected with rust: as, a rusty knife or sword.Consisting of rust; hence, having the appearance or effect of rust: as, rusty stains.Covered, incrusted, or stained with a dirty substance resembling rust; hence, filthy; specifically, as applied to grain, affected with the rust-disease: as, rusty wheat.In botany and zoology, of the color of rust; rubiginous; ferruginous.Red or yellow, as fish when the brine in which they are prepared evaporates. Fat fish, like herrings, mackerel, or halibut-fins, often turn rusty.Having lost the original gloss or luster; time-worn; shabby: as, a rusty black; clothes rusty at the seams.Out of practice; dulled in skill or knowledge through disuse or inactivity.Causing rust; rendering dull or inactive.Rough; hoarse; harsh; grating: as, a rusty voice.To make rusty; rust.Same as reasty for reasted.Stubborn: same as resty for restive.Uncivil; surly.