Quick definitions from WordNet (jacket)
▸ noun: a short coat
▸ noun: an outer wrapping or casing ("Phonograph records were sold in cardboard jackets")
▸ noun: the tough metal shell casing for certain kinds of ammunition
▸ noun: the outer skin of a potato
▸ noun: (dentistry) an artificial crown fitted over a broken or decayed tooth
▸ verb: put a jacket on ("The men were jacketed")
▸ verb: provide with a thermally non-conducting cover ("The tubing needs to be jacketed")
▸ Also see jacket
▸ noun: a short coat
▸ noun: an outer wrapping or casing ("Phonograph records were sold in cardboard jackets")
▸ noun: the tough metal shell casing for certain kinds of ammunition
▸ noun: the outer skin of a potato
▸ noun: (dentistry) an artificial crown fitted over a broken or decayed tooth
▸ verb: put a jacket on ("The men were jacketed")
▸ verb: provide with a thermally non-conducting cover ("The tubing needs to be jacketed")
▸ Also see jacket