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

Liner :: Liner (n.) A lining within the cylinder, in which the piston works and between which and the outer shell of the cylinder a space is left to form a steam jacket..
Jackstone :: Jackstone (n.) One of the pebbles or pieces used in the game of jackstones.
Jackslave :: Jackslave (n.) A low servant; a mean fellow.
Spencer :: Spencer (n.) A short jacket worn by men and by women.
Jack :: "Jack (v. t.) To move or lift, as a house, by means of a jack or jacks. See 2d Jack, n., 5..
Plane :: Plane (a.) A tool for smoothing boards or other surfaces of wood, for forming moldings, etc. It consists of a smooth-soled stock, usually of wood, from the under side or face of which projects slightly the steel cutting edge of a chisel, called the iron, which inclines backward, with an apperture in front for the escape of shavings; as, the jack plane; the smoothing plane; the molding plane, etc..
Jack :: Jack (n.) The knave of a suit of playing cards.
Jersey :: "Jersey (n.) A kind of knitted jacket; hence, in general, a closefitting jacket or upper garment made of an elastic fabric (as stockinet)..
Cleading :: Cleading (n.) A jacket or outer covering of wood, etc., to prevent radiation of heat, as from the boiler, cylinder. etc., of a steam engine..
Flapjack :: Flapjack (n.) A fried dough cake containing fruit; a turnover.
Jacket :: "Jacket (n.) A short upper garment, extending downward to the hips; a short coat without skirts..
Jack :: Jack (n.) A grating to separate and guide the threads; a heck box.
Jackstay :: "Jackstay (n.) A rail of wood or iron stretching along a yard of a vessel, to which the sails are fastened..
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..
Black-jack :: Black-jack (n.) A name given by English miners to sphalerite, or zinc blende; -- called also false galena. See Blende..
Water Plate :: Water plate () A plate heated by hot water contained in a double bottom or jacket.
Jack :: "Jack (n.) In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself..
Jack :: "Jack (n.) A familiar nickname of, or substitute for, John..
Acton :: Acton (n.) A stuffed jacket worn under the mail, or (later) a jacket plated with mail..
Jack :: "Jack (n.) A popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat..
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