1.Definition: (of a manuscript) defaced with changes
"Foul (or dirty) copy"
2.Definition: (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.Definition: (of color) discolored by impurities; not bright and clear
"Dirty", "A dirty (or dingy) white", "Dirty-green walls", "Dirty-blonde hair"
4.Definition: contaminated with infecting organisms
5.Definition: expressing or revealing hostility or dislike
6.Definition: obtained illegally or by improper means
7.Definition: 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", "Mining is a dirty job", "Cinderella did the dirty work while her sisters preened themselves"
8.Definition: spreading pollution or contamination; especially radioactive contamination
"The air near the foundry was always dirty", "A dirty bomb releases enormous amounts of long-lived radioactive fallout"
10.Definition: unpleasantly stormy
"There's dirty weather in the offing"
12.Definition: violating accepted standards or rules
"A dirty fighter"