1. (superl.) Defiled with dirt; foul; nasty; filthy; not clean or pure; serving to defile; as, dirty hands; dirty water; a dirty white.

2. (superl.) Sullied; clouded; -- applied to color.

3. (superl.) Sordid; base; groveling; as, a dirty fellow.

4. (superl.) Sleety; gusty; stormy; as, dirty weather.

5. (v. t.) To foul; to make filthy; to soil; as, to dirty the clothes or hands.

6. (v. t.) To tarnish; to sully; to scandalize; -- said of reputation, character, etc.