tart

American Heritage® Dictionary of the English Language, Fourth Edition

1. adj. Having a sharp pungent taste; sour. See Synonyms at sour.
2. adj. Sharp or bitter in tone or meaning; cutting.
3. n. A pastry shell with shallow sides, no top crust, and any of various fillings.
4. n. Chiefly British A pie.
5. n. A prostitute.
6. n. A woman considered to be sexually promiscuous.
7. v. Chiefly British To dress up or make fancy in a tawdry, garish way. Often used with up.

Century Dictionary and Cyclopedia

1. Sharp to the taste; acidulous: as, a tart apple.
2. Figuratively, sharp; keen; severe; cutting; biting: as, a tart reply; tart language; a tart rebuke.
3. Synonyms Sour, caustic. See tartness.
4. To make acid or piquant.
5. n. A pie or piece of pastry, consisting generally of fruit baked in paste. Compare pie.

Wiktionary

1. adj. Sharp to the taste; acid; sour.
2. adj. Of wine: high or too high in acidity.
3. adj. figuratively Sharp; keen; severe.
4. n. A type of small open pie, or piece of pastry, containing jelly or conserve; a sort of fruit pie.
5. n. UK (slang) A prostitute.
6. n. UK (slang, derogatory) By extension, any woman with loose sexual morals.
7. v. To practice prostitution
8. v. To practice promiscuous sex
9. v. To dress garishly or ostentatiously

GNU Webster's 1913

1. adj. Sharp to the taste; acid; sour.
2. adj. Fig.: Sharp; keen; severe.
3. n. A species of small open pie, or piece of pastry, containing jelly or conserve; a sort of fruit pie.

WordNet 3.0

1. n. a woman who engages in sexual intercourse for money
2. n. a pastry cup with a filling of fruit or custard and no top crust
3. adj. tasting sour like a lemon
4. n. a small open pie with a fruit filling
5. adj. harsh.