jacket

(noun) a short coat.

(noun) an outer wrapping or casing. Example: "Phonograph records were sold in cardboard jackets."

(noun) (dentistry) dental appliance consisting of an artificial crown for a broken or decayed tooth. Synonyms: crown, crownwork, jacket crown, cap. Example: "Tomorrow my dentist will fit me for a crown."

(noun) the outer skin of a potato.

(noun) the tough metal shell casing for certain kinds of ammunition.

(verb) provide with a thermally non-conducting cover. Example: "The tubing needs to be jacketed."

(verb) put a jacket on. Example: "The men were jacketed."