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..

Lern More About Jack

Black-jack :: Black-jack (n.) Caramel or burnt sugar, used to color wines, spirits, ground coffee, etc..
Jack :: "Jack (n.) A flag, containing only the union, without the fly, usually hoisted on a jack staff at the bowsprit cap; -- called also union jack. The American jack is a small blue flag, with a star for each State..
Spencer :: Spencer (n.) A short jacket worn by men and by women.
Jackman :: "Jackman (n.) One wearing a jack; a horse soldier; a retainer. See 3d Jack, n..
Kholah :: Kholah (n.) The Indian jackal.
Straight :: Straight (superl.) Composed of cards which constitute a regular sequence, as the ace, king, queen, jack, and ten-spot; as, a straight hand; a straight flush..
Jack :: "Jack (n.) A bar of iron athwart ships at a topgallant masthead, to support a royal mast, and give spread to the royal shrouds; -- called also jack crosstree..
Ketch :: Ketch (n.) A hangman. See Jack Ketch.
Sola :: Sola (n.) A leguminous plant (Aeschynomene aspera) growing in moist places in Southern India and the East Indies. Its pithlike stem is used for making hats, swimming-jackets, etc..
Jack :: "Jack (n.) A familiar nickname of, or substitute for, John..
Whimbrel :: Whimbrel (n.) Any one of several species of small curlews, especially the European species (Numenius phaeopus), called also Jack curlew, half curlew, stone curlew, and tang whaup. See Illustration in Appendix..
Pea-jacket :: Pea-jacket (n.) A thick loose woolen jacket, or coat, much worn by sailors in cold weather..
Jacket :: "Jacket (n.) A short upper garment, extending downward to the hips; a short coat without skirts..
Kadder :: Kadder (n.) The jackdaw.
Jack :: Jack (n.) The small bowl used as a mark in the game of bowls.
Color :: Color (n.) A distinguishing badge, as a flag or similar symbol (usually in the plural); as, the colors or color of a ship or regiment; the colors of a race horse (that is, of the cap and jacket worn by the jockey)..
Jack :: "Jack (n.) A compact, portable machine for planing metal..
Jacketed :: "Jacketed (a.) Wearing, or furnished with, a jacket..
Saurel :: Saurel (n.) Any carangoid fish of the genus Trachurus, especially T. trachurus, or T. saurus, of Europe and America, and T. picturatus of California. Called also skipjack, and horse mackerel..
Jackslave :: Jackslave (n.) A low servant; a mean fellow.
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