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Definition jack

Etymology 1

From Middle English jakke (“a term of familiarity or contempt; guy; a mechanical turnspit; a brass coin”), from the name Jack. See Jack.

Noun

jack (plural jacks)

1. A mechanical device used to raise and (temporarily) support a heavy object, e.g. screw jack, scissor jack, hydraulic jack, ratchet jack, scaffold jack.
2. A man or men in general.
3. A male animal.
4. A male ass.
5. (card games) A playing card with the letter "J" and the image of a knave or prince on it, the eleventh card in a given suit. Also called a knave.
6. (cricket, by extension) The eleventh batsman to come to the crease in an innings.
7. (slang) A detective.
8. (archaic) A knave (a servant or later, a deceitful man).
9. (sports) A target ball in bowls, etc; a jack-ball.
10. (games) A small, six-pointed playing piece used in the game of jacks.
11. (colloquial, euphemistic) Nothing, jack shit.
12. (nautical) A small flag at the bow of a ship.
13. (nautical) A naval ensign flag flown from the main mast, mizzen mast, or the aft-most major mast of (especially) British sailing warships; Union Jack.
14. (military) A coarse and cheap medieval coat of defense, especially one made of leather.
15. A penny with a head on both sides, used for cheating.
16. (slang) Money.
17. (slang, Appalachians) A smooth often ovoid large gravel or small cobble in a natural water course.
18. Mangifera caesia, related to the mango tree.
19. The freshwater pike, green pike or pickerel.
20. A large California rockfish, the bocaccio, Sebastes paucispinis.
21. Any of the marine fish in the family Carangidae.
22. (obsolete, nautical) A sailor, a jacktar.
23. (obsolete) A pitcher or can of waxed leather, supposed to resemble a jackboot; a black-jack.
24. (Britain, dialectal, obsolete) A drinking measure holding half a pint or, sometimes, a quarter of a pint.
25. A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine.
    1. A device to pull off boots.
    2. A sawhorse or sawbuck.
    3. A machine for turning a spit; a smokejack.
    4. (mining) A wooden wedge for separating rocks rent by blasting.
    5. A lever for depressing the sinkers which push the loops down on the needles in a knitting machine.
    6. A grating to separate and guide the threads in a warping machine; a heck box.
    7. A machine for twisting the sliver as it leaves the carding machine.
    8. A compact, portable machine for planing metal.
    9. A machine for slicking or pebbling leather.
    10. A system of gearing driven by a horse power, for multiplying speed.
    11. A hood or other device placed over a chimney or vent pipe, to prevent a back draught.
    12. In the harpsichord, an intermediate piece communicating the action of the key to the quill; also called hopper.
    13. In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself.
    14. (nautical) A bar of iron athwart ships at a topgallant masthead, to support a royal mast, and give spread to the royal shrouds; also called jack crosstree.
26. A surface-mounted connector for electrical, especially telecommunications, equipment.
27. Female ended electrical connector (see Electrical connector)
28. Electrical connector in a fixed position (see Gender of connectors and fasteners)

Verb

jack (third-person singular simple present jacks, present participle jacking, simple past and past participle jacked)

1. (transitive) To use a jack.
2. (transitive) To raise or increase.
3. To produce by freeze distillation; to distil (an alcoholic beverage) by freezing it and removing the ice (which is water), leaving the alcohol (which remains liquid).
4. (transitive, colloquial) To steal something, typically an automobile. Shortened form of carjacking.
5. (intransitive) To dance by moving the torso forward and backward in a rippling motion.

Adjective

jack (comparative more jack, superlative most jack)

1. (Australia) Tired, disillusioned; fed up (with). [from 19th c.]

Etymology 2

This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.

Noun

jack (plural jacks)

1. (slang, baseball) A home run.

Verb

jack (third-person singular simple present jacks, present participle jacking, simple past and past participle jacked)

1. (transitive, slang, baseball) To hit (the ball) hard; especially, to hit (the ball) out of the field, producing a home run.

Etymology 3

French jaque, jacque, perhaps from the proper name Jacques. Compare jacquerie.

Noun

jack (plural jacks)

1. A coarse mediaeval coat of defence, especially one made of leather.

Etymology 4

Noun

jack (plural jacks)

1. A jackfruit tree.

Results 134 Words with the letters JACK

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