\Rust"y\, a. [AS. rustig.] [Compar. {Rustier}; superl.
{Rustiest.}]
1. Covered or affected with rust; as, a rusty knife or sword;
   rusty wheat.
2. Impaired by inaction, disuse, or neglect.
   [Hector,] in this dull and long-continued truce, Is rusty
   grown.                                      --Shak.
3. Discolored and rancid; reasty; as, rusty bacon.
4. Surly; morose; crusty; sullen. [Obs. or Prov. Eng.]
   ``Rusty words.'' --Piers Plowman.
5. Rust-colored; dark. ``Rusty blood.'' --Spenser.
6. Discolored; stained; not cleanly kept; filthy.
         The rusty little schooners that bring firewood from
         the British provinces.                --Hawthorne.
7. (Bot.) Resembling, or covered with a substance resembling,
   rust; affected with rust; rubiginous.