/ ˈtjuːnɪk; NAmE ˈtuː-/ noun
1.
a loose piece of clothing covering the body down to the knees, usually without sleeves, as worn in ancient Greece and Rome
2.
a piece of women's clothing like a tunic, that reaches to the hips and is worn over trousers / pants or a skirt
3.
( BrE ) a tightly fitting jacket worn as part of a uniform by police officers, soldiers, etc.
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WORD ORIGIN
Old English , from Old French tunique or Latin tunica .