jacket

noun

1. A piece of clothing worn on the upper body outside a shirt or blouse, often waist length to thigh length.
2. A piece of a person's suit, beside trousers and, sometimes, waistcoat; coat (US)
3. A protective or insulating cover for an object (e.g. a book, hot water tank, bullet.)
4. (slang)A police record.

   “We got a crowd of black, white customers, out-of-state license plates, what have you. Somebody gonna check that out. They gonna drop a dime on me, call 911. And you know with my jacket I can't go back to jail.”

   “Yo's jacket shows possession with intent, possession of unlicensed firearm, and assault, for which he still owes three years.”

   “"I need to look up somebody's jacket."”

5. In ordnance, a strengthening band surrounding and reinforcing the tube in which the charge is fired.
6. The tough outer skin of a baked potato.

   “Cook the potatoes in their jackets.”

7. (Jamaica)A bastard child, in particular one whose father is unaware that he is not the child’s biological father.
8. (Appalachia)A vest (US); a waistcoat (UK).

verb

1. To confine (someone) to a straitjacket.

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

2. (transitive)To enclose or encase in a jacket or other covering.

   “...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.”

   “By jacketting the rod and putting the whole resonant-bar device in a pressure vessel, the intrinsic attenuation can be measured under helium confining pressure.”

   “Jaw has been exposed for preserving and jacketting. Note other bone fragments near jaw.”