simple past tense and past participle of jam-pack

(aviation) A piece of equipment that may be strapped to a person’s back and generate vertical thrust by a downward discharge of jet fluid, thereby rendering the person capable of flight.

Alternative form of rocket pack

(aviation) A jet pack using a rocket engine.

(informal) Packed or filled tightly.

(transitive, informal) To pack or fill very tightly.

A collection of six of something bundled together, especially six cans. / (bodybuilding) A highly developed set of abdominal muscles.

Packed in an airtight container in a partial vacuum.

simple past tense and past participle of vacuum-pack

(US, Canada) A traditional piece of luggage used in canoe travel, particularly in the Boundary Waters region of northern Minnesota and Ontario. A specialized type of backpack, made of either heavy canvas or nylon, that are approximately square in order to fit easily in the bottom of a canoe.