Tart \Tart\, n. [OE. tarte, F. tarte; perhaps originally the same word as tourte, LL. torta, fr. L. tortus, p. p. of torquere to twist, bend, wind, because tarts were originally made of a twisted shape. Cf. Torture, n.]

A species of small open pie, or piece of pastry, containing jelly or conserve; a sort of fruit pie.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Tart \Tart\, a. [AS. teart. [root]63. Cf. Tear, v. t.]

1. Sharp to the taste; acid; sour; as, a tart apple.

2. Fig.: Sharp; keen; severe; as, a tart reply; tart language; a tart rebuke.

Why art thou tart, my brother? --Bunyan.

Source: Webster's Revised Unabridged Dictionary (1913)