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Meaning of JACK

Pronunciation:  jak, jak

WordNet Dictionary
  1. [n]  male donkey
  2. [n]  any of several fast-swimming predacious fishes of tropical to warm-temperate seas
  3. [n]  tool for exerting pressure or lifting
  4. [n]  one of four face cards in a deck bearing a picture of a young prince
  5. [n]  small flag indicating a ship's nationality
  6. [n]  game equipment consisting of one of several small objects picked up while bouncing a ball in the game of jacks
  7. [n]  an electrical device consisting of a connector socket designed for the insertion of a plug
  8. [n]  immense East Indian fruit resembling breadfruit of; its seeds are commonly roasted
  9. [n]  someone who works with their hands; someone engaged in manual labor
  10. [n]  a man who serves as a sailor
  11. [n]  a small worthless amount; "you don't know jack"
  12. [v]  hunt with a jacklight
  13. [v]  lift with a jack, as of a car

JACK is a 4 letter word that starts with J.


 Synonyms: diddley, diddly, diddlyshit, diddly-shit, diddlysquat, diddly-squat, gob, jack up, jackass, jackfruit, jacklight, Jack-tar, jak, knave, laborer, labourer, manual laborer, mariner, old salt, sea dog, seafarer, seaman, shit, squat, tar
 See Also: able seaman, able-bodied seaman, agricultural laborer, agricultural labourer, Alectis ciliaris, amberfish, amberjack, Artocarpus heterophyllus, ass, banded rudderfish, bargee, bargeman, blue runner, boatswain, bo's'n, bos'n, bosun, bo'sun, bring up, bumper jack, carangid, carangid fish, Carangidae, Caranx bartholomaei, Caranx crysos, Caranx hippos, cleaner, court card, crevalle jack, crewman, day laborer, day labourer, deckhand, digger, dishwasher, dock worker, docker, dockhand, dock-walloper, drudge, edible fruit, Elagatis bipinnulata, electrical device, elevate, face card, faller, family Carangidae, feller, fireman, flag, galley slave, game equipment, gandy dancer, get up, gravedigger, hand, helmsman, hewer, hired hand, hired man, hod carrier, hodman, hunt, hunt down, itinerant, jack crevalle, jackfruit tree, jackscrew, kingfish, leatherjack, leatherjacket, lift, lighterman, loader, longshoreman, lumberjack, lumberman, lumper, miner, mineworker, mule driver, mule skinner, muleteer, navvy, officer, peon, phone jack, picture card, pilot, platelayer, porter, rail-splitter, rainbow runner, raise, roustabout, rudderfish, run, runner, sailor, sawyer, screw jack, sea lawyer, section hand, Seriola dorsalis, Seriola grandis, Seriola zonata, ship's officer, skinner, small indefinite amount, small indefinite quantity, splitter, sprayer, stacker, steeplejack, steerer, steersman, stevedore, stoker, telephone jack, threadfish, tool, track down, tracklayer, whaler, woodcutter, working man, working person, workman, wrecker, yardman, yellow jack, yellowtail



Webster's 1913 Dictionary
  1. \Jack\ (j[a^]k), n. [Pg. jaca, Malayalam, tsjaka.] (Bot.)
    A large tree, the {Artocarpus integrifolia}, common in the
    East Indies, closely allied to the breadfruit, from which it
    differs in having its leaves entire. The fruit is of great
    size, weighing from thirty to forty pounds, and through its
    soft fibrous matter are scattered the seeds, which are
    roasted and eaten. The wood is of a yellow color, fine grain,
    and rather heavy, and is much used in cabinetwork. It is also
    used for dyeing a brilliant yellow. [Written also {jak}.]
  2. \Jack\, n. [F. Jacques James, L. Jacobus, Gr. ?, Heb. Ya
    'aq[=o]b Jacob; prop., seizing by the heel; hence, a
    supplanter. Cf. {Jacobite}, {Jockey}.]
    1. A familiar nickname of, or substitute for, John.
             You are John Rugby, and you are Jack Rugby. --Shak.
    2. An impertinent or silly fellow; a simpleton; a boor; a
       clown; also, a servant; a rustic. ``Jack fool.''
             Since every Jack became a gentleman, There 's many a
             gentle person made a Jack.            --Shak.
    3. A popular colloquial name for a sailor; -- called also
       {Jack tar}, and {Jack afloat}.
    4. A mechanical contrivance, an auxiliary machine, or a
       subordinate part of a machine, rendering convenient
       service, and often supplying the place of a boy or
       attendant who was commonly called Jack; as:
       (a) A device to pull off boots.
       (b) A sawhorse or sawbuck.
       (c) A machine or contrivance for turning a spit; a smoke
           jack, or kitchen jack.
       (b) (Mining) A wooden wedge for separating rocks rent by
       (e) (Knitting Machine) A lever for depressing the sinkers
           which push the loops down on the needles.
       (f) (Warping Machine) A grating to separate and guide the
           threads; a heck box.
       (g) (Spinning) A machine for twisting the sliver as it
           leaves the carding machine.
       (h) A compact, portable machine for planing metal.
       (i) A machine for slicking or pebbling leather.
       (k) A system of gearing driven by a horse power, for
           multiplying speed.
       (l) A hood or other device placed over a chimney or vent
           pipe, to prevent a back draught.
       (m) In the harpsichord, an intermediate piece
           communicating the action of the key to the quill; --
           called also {hopper}.
       (n) In hunting, the pan or frame holding the fuel of the
           torch used to attract game at night; also, the light
           itself. --C. Hallock.
    5. 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
    6. The small bowl used as a mark in the game of bowls.
             Like an uninstructed bowler who thinks to attain the
             jack by delivering his bowl straight forward upon
             it.                                   --Sir W.
    7. The male of certain animals, as of the ass.
    8. (Zo["o]l.)
       (a) A young pike; a pickerel.
       (b) The jurel.
       (c) A large, California rock fish ({Sebastodes
           paucispinus}); -- called also {boccaccio}, and
       (d) The wall-eyed pike.
    9. A drinking measure holding half a pint; also, one holding
       a quarter of a pint. [Prov. Eng.] --Halliwell.
    10. (Naut.)
        (a) 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.
        (b) 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}. --R. H.
            Dana, Jr.
    11. The knave of a suit of playing cards.
    Note: Jack is used adjectively in various senses. It
          sometimes designates something cut short or diminished
          in size; as, a jack timber; a jack rafter; a jack arch,
    {Jack arch}, an arch of the thickness of one brick.
    {Jack back} (Brewing & Malt Vinegar Manuf.), a cistern which
       receives the wort. See under 1st {Back}.
    {Jack block} (Naut.), a block fixed in the topgallant or
       royal rigging, used for raising and lowering light masts
       and spars.
    {Jack boots}, boots reaching above the knee; -- worn in the
       17 century by soldiers; afterwards by fishermen, etc.
    {Jack crosstree}. (Naut.) See 10, b, above.
    {Jack curlew} (Zo["o]l.), the whimbrel.
    {Jack frame}. (Cotton Spinning) See 4
        (g), above.
    {Jack Frost}, frost personified as a mischievous person.
    {Jack hare}, a male hare. --Cowper.
    {Jack lamp}, a lamp for still hunting and camp use. See def.
        (n.), above.
    {Jack plane}, a joiner's plane used for coarse work.
    {Jack post}, one of the posts which support the crank shaft
       of a deep-well-boring apparatus.
    {Jack pot} (Poker Playing), the name given to the stakes,
       contributions to which are made by each player
       successively, till such a hand is turned as shall take the
       ``pot,'' which is the sum total of all the bets.
    {Jack rabbit} (Zo["o]l.), any one of several species of large
       American hares, having very large ears and long legs. The
       California species ({Lepus Californicus}), and that of
       Texas and New Mexico ({L. callotis}), have the tail black
       above, and the ears black at the tip. They do not become
       white in winter. The more northern prairie hare ({L.
       campestris}) has the upper side of the tail white, and in
       winter its fur becomes nearly white.
    {Jack rafter} (Arch.), in England, one of the shorter rafters
       used in constructing a hip or valley roof; in the United
       States, any secondary roof timber, as the common rafters
       resting on purlins in a trussed roof; also, one of the
       pieces simulating extended rafters, used under the eaves
       in some styles of building.
    {Jack salmon} (Zo["o]l.), the wall-eyed pike, or glasseye.
    {Jack sauce}, an impudent fellow. [Colloq. & Obs.]
    {Jack shaft} (Mach.), the first intermediate shaft, in a
       factory or mill, which receives power, through belts or
       gearing, from a prime mover, and transmits it, by the same
       means, to other intermediate shafts or to a line shaft.
    {Jack sinker} (Knitting Mach.), a thin iron plate operated by
       the jack to depress the loop of thread between two
    {Jack snipe}. (Zo["o]l.) See in the Vocabulary.
    {Jack staff} (Naut.), a staff fixed on the bowsprit cap, upon
       which the jack is hoisted.
    {Jack timber} (Arch.), any timber, as a rafter, rib, or
       studding, which, being intercepted, is shorter than the
    {Jack towel}, a towel hung on a roller for common use.
    {Jack truss} (Arch.), in a hip roof, a minor truss used where
       the roof has not its full section.
    {Jack tree}. (Bot.) See 1st {Jack}, n.
    {Jack yard} (Naut.), a short spar to extend a topsail beyond
       the gaff.
    {Blue jack}, blue vitriol; sulphate of copper.
    {Hydraulic jack}, a jack used for lifting, pulling, or
       forcing, consisting of a compact portable hydrostatic
       press, with its pump and a reservoir containing a supply
       of liquid, as oil.
        (a) One called upon to take the place of another in an
        (b) An itinerant parson who conducts an occasional
            service for a fee.
    {Jack-at-all-trades}, one who can turn his hand to any kind
       of work.
    {Jack-by-the-hedge} (Bot.), a plant of the genus {Erysimum}
       ({E. alliaria}, or {Alliaria officinalis}), which grows
       under hedges. It bears a white flower and has a taste not
       unlike garlic. Called also, in England, {sauce-alone}.
       --Eng. Cyc.
        (a) (Bot.) A tropical tree ({Hernandia sonora}), which
            bears a drupe that rattles when dry in the inflated
        (b) A child's toy, consisting of a box, out of which,
            when the lid is raised, a figure springs.
        (c) (Mech.) An epicyclic train of bevel gears for
            transmitting rotary motion to two parts in such a
            manner that their relative rotation may be variable;
            applied to driving the wheels of tricycles, road
            locomotives, and to cotton machinery, etc.; an
            equation box; a jack frame; -- called also
            {compensating gearing}.
        (d) A large wooden screw turning in a nut attached to the
            crosspiece of a rude press.
    {Jack-in-office}, an insolent fellow in authority. --Wolcott.
    {Jack-in-the-bush} (Bot.), a tropical shrub with red fruit
       ({Cordia Cylindrostachya}).
    {Jack-in-the-green}, a chimney sweep inclosed in a framework
       of boughs, carried in Mayday processions.
    {Jack-in-the-pulpit} (Bot.), the American plant {Aris[ae]ma
       triphyllum}, or Indian turnip, in which the upright spadix
       is inclosed.
    {Jack-of-the-buttery} (Bot.), the stonecrop ({Sedum acre}).
    {Jack-of-the-clock}, a figure, usually of a man, on old
       clocks, which struck the time on the bell.
    {Jack-on-both-sides}, one who is or tries to be neutral.
    {Jack-out-of-office}, one who has been in office and is
       turned out. --Shak.
    {Jack the Giant Killer}, the hero of a well-known nursery
    {Jack-with-a-lantern}, {Jack-o'-lantern}.
        (a) An ignis fatuus; a will-o'-the-wisp. ``[Newspaper
            speculations] supplying so many more jack-o'-lanterns
            to the future historian.'' --Lowell.
        (b) A lantern made of a pumpkin so prepared as to show in
            illumination the features of a human face, etc.
    {Yellow Jack} (Naut.), the yellow fever; also, the quarantine
       flag. See {Yellow flag}, under {Flag}.
  3. \Jack\, n. [F. jaque, jacque, perh. from the proper name
    Jacques. Cf. {Jacquerie}.]
    A coarse and cheap medi[ae]val coat of defense, esp. one made
    of leather.
          Their horsemen are with jacks for most part clad. --Sir
                                                   J. Harrington.
  4. \Jack\, n. [Named from its resemblance to a jack boot.]
    A pitcher or can of waxed leather; -- called also {black
    jack}. [Obs.] --Dryden.
  5. \Jack\, v. i.
    To hunt game at night by means of a jack. See 2d {Jack}, n.,
    4, n.
  6. \Jack\, v. t.
    To move or lift, as a house, by means of a jack or jacks. See
    2d {Jack}, n., 5.
Dream Dictionary
 Definition: Seeing or using a jack in your dream, suggests that you are looking to balance your life. The dream may also symbolize a person named "Jack" in your life.
Biology Dictionary
  1. Young salmon, usually a male, that matures precociously.
  2. Bank protection element consisting of wire or cable strung on three mutually perpendicular struts.
Thesaurus Terms
 Related Terms: AB, able seaman, able-bodied seaman, ace, Ancient Mariner, and blue, Argonaut, ass, baluster, balustrade, banderole, banister, banner, banneret, base, best bower, black flag, blue ensign, bluejacket, blunt, boodle, bower, brass, bread, buccaneer, bucks, bunting, burgee, burro, cabbage, cards, caryatid, cash, chips, clubs, coachwhip, coin, colonnade, color, colors, column, crab, crane, cuddy, dado, Dannebrog, deck, deep-sea man, derrick, deuce, diamonds, dickey, die, dinero, donkey, dough, dummy, Dylan, ensign, erector, face cards, fair-weather sailor, fisherman, flag, flush, Flying Dutchman, footstalk, forklift, full house, gantry crane, gelt, gilt, gonfalon, gonfanon, grease, green, green stuff, greenbacks, guidon, hand, hearts, hearty, hoist, house flag, hydraulic tailgate, jack afloat, jackass, jackscrew, jack-tar, jacky, jennet, jenny, jenny ass, joker, Jolly Roger, kale, king, knave, left bower, lever, lift, lifter, limey, lobsterman, long pennant, mariner, matelot, mazuma, merchant flag, money, moolah, mopus, national flag, navigator, neddy, Neptune, newel-post, OD, oil of palms, ointment, Old Glory, oof, ooftish, oriflamme, pack, pair, pedestal, pedicel, peduncle, pendant, pennant, pennon, pennoncel, picture cards, pier, pilaster, pile, piling, pillar, pirate, playing cards, plinth, pole, Poseidon, post, privateer, queen, queen-post, red, red ensign, rhino, rocks, Rocky Mountain canary, round, royal flush, royal standard, rubber, ruff, sailor, salt, scratch, sea dog, sea rover, seafarer, seafaring man, seaman, shaft, shekels, shipman, signal flag, simoleons, singleton, socle, spades, spondulics, staff, stalk, stanchion, stand, standard, Stars and Stripes, Star-Spangled Banner, stem, straight, streamer, subbase, sugar, surbase, swallowtail, tackle, tar, tarpaulin, the needful, tin, trey, trick, tricolor, trump, trunk, Union Flag, Union Jack, upright, Varuna, vexillum, viking, wampum, water dog, whaler, white, windjammer, windlass, windsailor