Jacket (software) definition

(1) A short coat

(2) An outer wrapping or casing

"Phonograph records were sold in cardboard jackets"

(3) The tough metal shell casing for certain kinds of ammunition

(4) (dentistry) an artificial crown fitted over a broken or decayed tooth

(5) The outer skin of a potato

(6) Put a jacket on

"The men were jacketed"

(7) Provide with a thermally non-conducting cover

"The tubing needs to be jacketed"