UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈdɜːrti/US:USA pronunciation: IPA and respellingUSA pronunciation: IPA/ˈdɝti/ ,USA pronunciation: respelling(dûr′tē)
vile; mean; sordid; contemptible:to play a dirty trick on someone.
obscene; pornographic; lewd:a dirty joke.
undesirable or unpleasant; thankless:He left the dirty work for me.
very unfortunate or regrettable:That's a dirty shame!
not fair or sportsmanlike; unscrupulous:a dirty fighter.
hostile, insulting, contemptuous, or resentful:She gave me a dirty look. He made a dirty crack about the cooking.
Military(of a nuclear weapon) producing a relatively large amount of radioactive fallout.
(of the weather) stormy; squally:It looks dirty to windward.
Informal Termsobtained through illegal or disreputable means:dirty money.
appearing as if soiled; dark-colored; dingy; murky.
Slang Termsusing or in possession of narcotics.
Banking, Business[Foreign Exchange.](of currency floats) manipulated, as by a central bank influencing or changing exchange rates (opposed to clean).
Idiomsdo (someone) dirty, [Slang.]to treat unfairly or reprehensibly, as by cheating or slandering.
v.t., v.i.
to make or become dirty.
adv.
Informal Termsin a mean, unscrupulous, or underhand way:to play dirty.
[Informal.]in a lewd manner:to talk dirty.
dirt + -y1 1520–30
dirt′i•ly, adv. dirt′i•ness, n.
1. grimy, defiled. Dirty,filthy,foul,squalid refer to that which is not clean. Dirty is applied to that which is filled or covered with dirt so that it is unclean or defiled:dirty clothes.Filthy is an emphatic word suggesting something that is excessively soiled or dirty:filthy streets.Both dirty and filthy can refer to obscenity:a dirty mind, a filthy novel.Foul implies an uncleanness that is grossly offensive to the senses:a foul odor.Squalid, applied usually to dwellings or surroundings, implies dirtiness that results from the slovenly indifference often associated with poverty:a squalid tenement.3. base, vulgar, low, shabby, groveling. 4. nasty, lascivious, lecherous. 10. rainy, foul, sloppy, disagreeable, nasty. 12. dull, dark, sullied, clouded. 16. soil, befoul, sully.