- a short coat, usually with sleeves
- an outer coating or covering; specif.,
- dust jacket
- ☆ a cardboard holder for a phonograph record
- the metal casing of a bullet
- the insulating casing on a pipe or boiler
- the skin of a potato, etc.
- ☆ a folder or envelope for holding letters or documents
Origin of jacketMiddle English jaket ; from Old French jaquette, diminutive of jaque ; from Spanish jaco ; from Arabic shakk
- to put a jacket, or coat, on
- to cover with a casing, wrapper, etc.
- A short coat usually extending to the hips.
- An outer covering or casing, especially:a. The skin of a potato.b. The dust jacket of a book or phonograph record.c. An insulation covering for a steam pipe, wire, boiler, or similar part.d. An open envelope or folder for filing papers.e. The outer metal shell or case of a bullet.
transitive verbjack·et·ed, jack·et·ing, jack·ets
Origin of jacketMiddle English jaket, from Old French jaquet, diminutive of jaque, short jacket, tunic, from jacques, nickname for French peasants, from the name Jacques; see Jack .
- A piece of clothing worn on the upper body outside a shirt or blouse, often waist length to thigh length.
- A piece of a person's suit, beside trousers and, sometimes, waistcoat ; coat (US)
- A removable or replaceable protective or insulating cover for an object (eg a book, hot water tank.)
- (slang) A police record.
- (military) In ordnance, a strengthening band surrounding and reinforcing the tube in which the charge is fired.
(third-person singular simple present jackets, present participle jacketing, simple past and past participle jacketed)
From Middle French jacquet, diminutive of Old French jaque.
jacket - Computer Definition
See cable jacket.
A plastic housing that contains a floppy disk. The 5.25" disk is built into a flexible jacket; the 3.5" disk uses a rigid jacket.