Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of jack is as below...

Jack :: "Jack (n.) A hood or other device placed over a chimney or vent pipe, to prevent a back draught..

Jack-o''-lantern :: "Jack-o'-lantern (n.) See Jack-with-a-lantern, under 2d Jack..

Jack :: Jack (n.) A wooden wedge for separating rocks rent by blasting.

Jackdaw :: "Jackdaw (n.) See Daw, n..

Jane-of-apes :: "Jane-of-apes (n.) A silly, pert girl; -- corresponding to jackanapes..

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..

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

Juddock :: Juddock (n.) See Jacksnipe.

Jackscrew :: "Jackscrew (n.) A jack in which a screw is used for lifting, or exerting pressure. See Illust. of 2d Jack, n., 5..

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.) A popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat..

Jigger :: "Jigger (n.) A pendulum rolling machine for slicking or graining leather; same as Jack, 4 (i)..

Minute-jack :: Minute-jack (n.) A timeserver; an inconstant person.

Jump :: Jump (n.) A kind of loose jacket for men.

Jackal :: "Jackal (n.) One who does mean work for another's advantage, as jackals were once thought to kill game which lions appropriated..

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..

Jacksaw :: Jacksaw (n.) The merganser.

Flapjack :: Flapjack (n.) A fried dough cake containing fruit; a turnover.

Jack :: "Jack (n.) A machine or contrivance for turning a spit; a smoke jack, or kitchen jack..

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..

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