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noun
1.
a short coat, in any of various forms, usually opening down the front.
2.
something designed to be placed around the upper part of the body for a specific purpose other than use as clothing:
a life jacket.
3.
a protective outer covering.
4.
the skin of a potato, especially when it has been cooked.
5.
book jacket.
6.
the cover of a paperbound book, usually bearing an illustration.
7.
a paper or cardboard envelope for protecting a phonograph record.
8.
a metal casing, as the steel covering of a cannon, the steel cover around the core of a bullet, or the water jacket on certain types of machine guns.
9.
a folded paper or open envelope containing an official document.
verb (used with object)
10.
to put a jacket on (someone or something).
noun
1.
a short coat, esp one that is hip-length and has a front opening and sleeves
2.
something that resembles this or is designed to be worn around the upper part of the body: a life jacket
3.
any exterior covering or casing, such as the insulating cover of a boiler
4.
the part of the cylinder block of an internal-combustion engine that encloses the coolant
5.
See dust jacket
6.

the skin of a baked potato
(as modifier): jacket potatoes

7.
a metal casing used in certain types of ammunition
8.
(US) a cover to protect a gramophone record Brit name sleeve
9.
(mainly US) a folder or envelope to hold documents
verb
10.
(transitive) to put a jacket on (someone or something)

jacket jack·et (jāk’ĭt)
n.

A fixed bandage applied around the body to immobilize the spine.

An artificial crown of a tooth composed of fired porcelain or acrylic resin.

jacket

noun

A criminal record; rap sheet

Related Terms

dust someone’s jacket, monkey jacket, yellow jacket

[1940s+ Police; fr the cardboard folder or jacket used to hold the papers]