A nickname or diminutive of John, used as a general term of contempt for any saucy of paltry fellow.

The name of an instrument that supplies the place of a boy; an instrument to pull off boots.

An engine to turn a spit; as a kitchen jack; a smoke jack.

A young pike.

A coat of mail.

A pitcher of waxed leather.

A small bowl thrown out for a mark to the bowlers.

Part of a musical instrument called a virginal.

The male of certain animals, as of the ass.

A horse or wooden frame on which wood or timer is sawed.

In sea-language, a flag, ensign or colors, displayed from a staff on the end of a bow-sprit.

In Yorkshire, half a pint. A quarter of a pint. Jack of all trades, a person who can turn his hand to any king of business. Jack by the hedge, a plant of the genus Erysimum, that grown under hedges. Jack in a box, a plant of the genus Hernandia.

A large wooden male screw, turning in a female one. Jack with a lantern, an ignis fatuus, a meteor that appears in low moist lands. Jack of the clock-house, a little man that strikes the quarters in a clock.