A tunic is a garment for the body, usually simple in style, reaching from the shoulders to a length somewhere between the hips and the knees. The name derives from the Latin tunica, the basic garment worn by both men and women in Ancient Rome, which in turn was based on earlier Greek garments that covered wearers' waists.

A chiton is a form of tunic that fastens at the shoulder, worn by men and women of ancient Greece and Rome. There are two forms of chiton: the Doric and the later Ionic. According to Herodotus, popular legend was that Athenian women began to wear the chiton as opposed to the peplos after several women stabbed a messenger to death with the bronze pins characteristic of the peplos.