Webster's Revised Unabridged Dictionary · 1913

Dirty

Dirty , adjective

1.
Defiled with dirt; foul; nasty; filthy; not clean or pure; serving to defile; as, dirty hands; dirty water; a dirty white. — Spenser
2.
Sullied; clouded; -- applied to color. — Locke
3.
Sordid; base; groveling; as, a dirty fellow.
The creature's at his dirty work again. — Pope
4.
Sleety; gusty; stormy; as, dirty weather.
Storms of wind, clouds of dust, an angry, dirty sea. — M. Arnold

Dirty , transitive verb

1.
To foul; to make filthy; to soil; as, to dirty the clothes or hands.
2.
To tarnish; to sully; to scandalize; -- said of reputation, character, etc.