The definition of tart is something that has a sharp or sour taste.(adjective)
An example of tart is the taste of lemons.
Tart is defined as a small pastry shell filled with fruit, jam or jelly.(noun)
An example of a tart is a small open faced pie filled with custard and topped with sliced fruit.
See tart in Webster's New World College Dictionary
Origin: ME < OE teart < PGmc *trat- < IE base *der- > tear
Origin: ME tarte < OFr, prob. var. of tourte < LL(Ec) torta, twisted loaf < L tortus: see tort
Origin: < tart, orig., slang term of endearment
See tart in American Heritage Dictionary 4
adjective tart·er, tart·est
Origin: Middle English
Origin: , from Old English teart, severe; see der- in Indo-European roots.
Origin: Middle English tarte
Origin: , from Old French
Origin: , perhaps alteration of tartane
Origin: , from Late Latin torta, a kind of bread.
Learn more about tart