jacket

Any of certain types of outerwear.; A piece of clothing worn on the upper body outside a shirt or blouse, often waist length to thigh length.

Any of certain types of outerwear.; A piece of a person's suit, beside trousers and, sometimes, waistcoat; coat (US).

Any of certain types of outerwear.; An outer garment (usually white) intended for chefs and which may be taken to signify status.

Any of certain types of outerwear.; A vest (US); a waistcoat (UK).AppalachiaUK

Any of certain types of outerwear.; A letter jacket.US

• He's hoping to earn his jacket this year.

Any of certain types of outerwear.; A lifejacket.

A protective or insulating cover for an object (e.g. a book, bullet, hot water tank, vinyl record).; A file jacket.

A protective or insulating cover for an object (e.g. a book, bullet, hot water tank, vinyl record).; In ordnance, a strengthening band surrounding and reinforcing the tube in which the charge is fired.

A protective or insulating cover for an object (e.g. a book, bullet, hot water tank, vinyl record).; The tough outer skin of a baked potato.

• Cook the potatoes in their jackets.

A police record.slang

• "I need to look up somebody's jacket."

To confine (someone) to a straitjacket.

• ‘None of your gab, I tell you! If you speak another word, I'll have you jacketed[…]!’

To enclose or encase in a jacket or other covering.transitive

• ...to...prevent...the loss of heat...there is also a layer of silicate cotton or slag wool. This latter material is also employed to jacket the chimney for a certain portion of its length.
• By jacketting the mercury tube determinations can be made at any temperature desired.