English definition of Jack

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Definition of jack

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"Jack (n.) A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack..

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Jack :: "Jack (n.) A large tree, the Artocarpus integrifolia, common in the East Indies, closely allied to the breadfruit, from which it differs in having its leaves entire. The fruit is of great size, weighing from thirty to forty pounds, and through its soft fibrous matter are scattered the seeds, which are roasted and eaten. The wood is of a yellow color, fine grain, and rather heavy, and is much used in cabinetwork. It is also used for dyeing a brilliant yellow..

Pea-jacket :: Pea-jacket (n.) A thick loose woolen jacket, or coat, much worn by sailors in cold weather..

Blende :: Blende (n.) A mineral, called also sphalerite, and by miners mock lead, false galena, and black-jack. It is a zinc sulphide, but often contains some iron. Its color is usually yellow, brown, or black, and its luster resinous..

Jack :: Jack (n.) A device to pull off boots.

Knight :: Knight (n.) A playing card bearing the figure of a knight; the knave or jack.

Skipjack :: Skipjack (n.) An upstart.

Juppon :: "Juppon (n.) A sleeveless jacket worn over the armor in the 14th century. It fitted closely, and descended below the hips..

Black-jack :: Black-jack (n.) The ensign of a pirate.

Flapjack :: Flapjack (n.) A fklat cake turned on the griddle while cooking; a griddlecake or pacake.

Jak :: Jak (n.) see Ils Jack.

Jackwood :: "Jackwood (n.) Wood of the jack (Artocarpus integrifolia), used in cabinetwork..

Supplely :: Supple-jack (n.) A somewhat similar tropical American plant (Paullinia Curassavica); also, a walking stick made from its stem..

Jack :: "Jack (n.) The male of certain animals, as of the ass..

Acton :: Acton (n.) A stuffed jacket worn under the mail, or (later) a jacket plated with mail..

Jackpudding :: Jackpudding (n.) A merry-andrew; a buffoon.

Jackeen :: "Jackeen (n.) A drunken, dissolute fellow..

Jackmen :: Jackmen (pl. ) of Jackma.

Jackstraw :: "Jackstraw (n.) One of a set of straws of strips of ivory, bone, wood, etc., for playing a child's game, the jackstraws being thrown confusedly together on a table, to be gathered up singly by a hooked instrument, without touching or disturbing the rest of the pile. See Spilikin..

Jackanapes :: Jackanapes (n.) A coxcomb; an impertinent or conceited fellow.

Crick :: Crick (n.) A small jackscrew.