1. (adj.)tart to the taste; sour or acid: tart apples.
2. tart sharp in character, spirit, or expression: a tart remark.
3. (n.)tart a usu. small, shallow pie, without a top crust, filled with fruit, custard, or the like.
4. tart a prostitute or promiscuous woman.
5. (v.)tart tart up, to adorn, dress, or decorate, esp. in a gaudy manner.
Etymology: (1350–1400; ME tarte < MF)
Definition of 'TART'
Princeton's WordNet
1. (noun)prostitute, cocotte, whore, harlot, bawd, tart, cyprian, fancy woman, working girl, sporting lady, lady of pleasure, woman of the street a woman who engages in sexual intercourse for money
2. (noun)tart a small open pie with a fruit filling