a device for lifting heavy objects, especially one for raising the axle of a motor vehicle off the ground so that a wheel can be changed or the underside inspected

a playing card bearing a representation of a soldier, page, or knave, normally ranking next below a queen

a socket designed to receive a jack plug

a plug used in a jack socket, consisting of a shaft used to make a connection that transmits a signal, typically used in sound equipment

a small white ball in bowls, at which the players aim

a game played by tossing and catching small round pebbles or star-shaped pieces of metal or plastic

used to typify an ordinary man

he had that world-weary look of the working Jack who'd seen everything

a small version of a national flag flown at the bow of a vessel in harbour to indicate its nationality

money

a device for turning a spit

a part of the mechanism in a spinet or harpsichord that connects a key to its corresponding string and causes the string to be plucked when the key is pressed down

a marine fish that is typically laterally compressed with a row of large spiky scales along each side, important in many places as food or game fish

the male of various animals, especially a merlin

used in names of animals that are smaller than similar kinds, e.g. jack snipe

a sleeveless padded tunic worn by foot soldiers