A short upper garment, extending downward to the hips; a short coat without skirts.
- A short coat usually extending to the hips.
- An outer covering or casing, especially:
- The skin of a potato.
- The dust jacket of a book or phonograph record.
- An insulation covering for a steam pipe, wire, boiler, or similar part.
- An open envelope or folder for filing papers.
- The outer metal shell or case of a bullet.
- To supply or cover with a jacket.