Main Entry: ¹jack·et

Pronunciation: \ˈja-kət\

Function: noun

Etymology: Middle English jaket, from Anglo-French jackés, plural, diminutive of Middle French jaque short jacket, from jacques peasant, from the name Jacques James

Date: 15th century

1 a : a garment for the upper body usually having a front opening, collar, lapels, sleeves, and pockets b : something worn or fastened around the body but not for use as clothing
2 a (1) : the natural covering of an animal (2) : the fur or wool of a mammal b : the skin of a potato
3 : an outer covering or casing: as a (1) : a thermally nonconducting cover (2) : a covering that encloses an intermediate space through which a temperature-controlling fluid circulates (3) : a tough cold-worked metal casing that forms the outer shell of a built-up bullet b (1) : a wrapper or open envelope for a document (2) : an envelope for enclosing registered mail during delivery from one post office to another c (1) : a detachable protective cover for a book (2) : a paper or cardboard envelope for a phonograph record

— jack·et·less \-ləs\ adjective