Adjective
1. soiled or likely to soil with dirt or grime;
"dirty unswept sidewalks""a child in dirty overalls""dirty slums""piles of dirty dishes""put his dirty feet on the clean sheet""wore an unclean shirt""mining is a dirty job""Cinderella did the dirty work while her sisters preened themselves"2. (of behavior or especially language) characterized by obscenity or indecency;
"dirty words""a dirty old man""dirty books and movies""boys telling dirty jokes""has a dirty mouth"3. vile; despicable;
"a dirty (or lousy) trick""a filthy traitor"4. spreading pollution or contamination; especially radioactive contamination;
"the air near the foundry was always dirty""the air near the foundry was always dirty""a dirty bomb releases enormous amounts of long-lived radioactive fallout"5. contaminated with infecting organisms;
"dirty wounds""obliged to go into infected rooms"- Jane Austen6. (of color) discolored by impurities; not bright and clear;
"dirty" is often used in combination"a dirty (or dingy) white""the muddied gray of the sea""muddy colors""dirty-green walls""dirty-blonde hair"7. (of a manuscript) defaced with changes;
"foul (or dirty) copy"8. obtained illegally or by improper means;
"dirty money""ill-gotten gains"9. expressing or revealing hostility or dislike;
"dirty looks"10. violating accepted standards or rules;
"a dirty fighter""used foul means to gain power""a nasty unsporting serve""fined for unsportsmanlike behavior"11. unethical or dishonest;
"dirty police officers""a sordid political campaign"12. unpleasantly stormy;
"there's dirty weather in the offing"