rusty

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Covered with rust; corroded.
• adjective Consisting of or produced by rust.
• adjective Of a yellowish-red or brownish-red color.
• adjective Working or operating stiffly or incorrectly because of or as if because of rust.
• adjective Weakened or impaired by neglect, disuse, or lack of practice.

from The Century Dictionary.

• To make rusty; rust.
• Same as reasty for reasted.
• Stubborn: same as resty for restive.
• Uncivil; surly.
• 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.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Covered or affected with rust.
• adjective Impaired by inaction, disuse, or neglect.
• adjective Discolored and rancid; reasty.
• adjective Obs. or Prov. Eng. Surly; morose; crusty; sullen.
• adjective Rust-colored; dark.
• adjective Discolored; stained; not cleanly kept; filthy.
• adjective (Bot.) Resembling, or covered with a substance resembling, rust; affected with rust; rubiginous.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Affected by rust.
• adjective Of the rust color, reddish or reddish-brown.
• adjective Having red or reddish-brown hair.
• adjective Lacking recent experience, out of practice, especially with respect to a skill or activity.
• adjective discolored and rancid; reasty

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective covered with or consisting of rust
• adjective impaired in skill by neglect
• adjective ancient
• adjective of the brown color of rust