Definition of jack

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Jack (n.) A grating to separate and guide the threads; a heck box.

Lern More About Jack

Grasshopper :: Grasshopper (n.) In ordinary square or upright pianos of London make, the escapement lever or jack, so made that it can be taken out and replaced with the key; -- called also the hopper..
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..
Flapjack :: Flapjack (n.) A fklat cake turned on the griddle while cooking; a griddlecake or pacake.
Skipjack :: Skipjack (n.) A shallow sailboat with a rectilinear or V-shaped cross section.
Jack :: "Jack (n.) An impertinent or silly fellow; a simpleton; a boor; a clown; also, a servant; a rustic..
Chuck :: Chuck (n.) A game played with chucks, in which one or more are tossed up and caught; jackstones..
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..
Truss :: Truss (n.) A padded jacket or dress worn under armor, to protect the body from the effects of friction; also, a part of a woman's dress; a stomacher..
Ignis Fatuus :: Ignis fatuus () A phosphorescent light that appears, in the night, over marshy ground, supposed to be occasioned by the decomposition of animal or vegetable substances, or by some inflammable gas; -- popularly called also Will-with-the-wisp, or Will-o'-the-wisp, and Jack-with-a-lantern, or Jack-o'-lantern..
Jack :: "Jack (n.) In the harpsichord, an intermediate piece communicating the action of the key to the quill; -- called also hopper..
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..
Black-jack :: Black-jack (n.) A large leather vessel for beer, etc..
Jack :: "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..
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..
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..
Ketch :: Ketch (n.) A hangman. See Jack Ketch.
Jacket :: "Jacket (n.) A garment resembling a waistcoat lined with cork, to serve as a life preserver; -- called also cork jacket..
Black-jack :: Black-jack (n.) Caramel or burnt sugar, used to color wines, spirits, ground coffee, etc..
Queller :: Queller (n.) A killer; as, Jack the Giant Queller..
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