• "Jack worked with a will."
    "Jack worked with a will."
  • WordNet 3.6
    • v jack hunt with a jacklight
    • v jack lift with a special device "jack up the car so you can change the tire"
    • n jack male donkey
    • n jack any of several fast-swimming predacious fishes of tropical to warm temperate seas
    • n jack tool for exerting pressure or lifting
    • n jack one of four face cards in a deck bearing a picture of a young prince
    • n jack small flag indicating a ship's nationality
    • n jack game equipment consisting of one of several small six-pointed metal pieces that are picked up while bouncing a ball in the game of jacks
    • n jack an electrical device consisting of a connector socket designed for the insertion of a plug
    • n jack a small ball at which players aim in lawn bowling
    • n jack immense East Indian fruit resembling breadfruit; it contains an edible pulp and nutritious seeds that are commonly roasted
    • n jack someone who works with their hands; someone engaged in manual labor
    • n Jack a man who serves as a sailor
    • n jack a small worthless amount "you don't know jack"
    • ***

Additional illustrations & photos:

A Sorting Jack A Sorting Jack
Section of Jack Plane Section of Jack Plane
Little Jack Horner music Little Jack Horner music
Jack and Jill music Jack and Jill music

Webster's Revised Unabridged Dictionary
  • Interesting fact: The 1st live televised murder was in 1963, when Jack Ruby killed JFK's assassin, Lee Harvey Oswald while millions of viewers watched.
    • Jack (Naut) 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.
    • n Jack A coarse and cheap mediæval coat of defense, esp. one made of leather. "Their horsemen are with jacks for most part clad."
    • Jack A compact, portable machine for planing metal.
    • Jack A device to pull off boots.
    • Jack A drinking measure holding half a pint; also, one holding a quarter of a pint.
    • Jack A familiar nickname of, or substitute for, John. "You are John Rugby, and you are Jack Rugby."
    • Jack (Naut) 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.
    • Jack A game played with small (metallic, with tetrahedrally oriented spikes) objects (the jacks(1950+), formerly jackstones) that are tossed, caught, picked up, and arranged on a horizontal surface in various patterns; in the modern American game, the movements are accompanied by tossing or bouncing a rubber ball on the horizontal surface supporting the jacks. same as jackstones.
    • Jack A grating to separate and guide the threads; a heck box.
    • Jack A hood or other device placed over a chimney or vent pipe, to prevent a back draught.
    • n Jack jăk (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.
    • Jack (Zoöl) A large, California rock fish (Sebastodes paucispinus); -- called also boccaccio, and mérou.
    • Jack A lever for depressing the sinkers which push the loops down on the needles.
    • Jack A machine for slicking or pebbling leather.
    • Jack A machine for twisting the sliver as it leaves the carding machine.
    • Jack A machine or contrivance for turning a spit; a smoke jack, or kitchen jack.
    • Jack 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
    • n Jack A pitcher or can of waxed leather; -- called also black jack.
    • Jack A popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat.
    • Jack A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body such as an automobile 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.
    • Jack A sawhorse or sawbuck.
    • Jack A system of gearing driven by a horse power, for multiplying speed.
    • Jack A wooden wedge for separating rocks rent by blasting.
    • Jack (Zoöl) A young pike; a pickerel.
    • Jack 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 ."
    • Jack Apple jack.
    • Jack Brandy.
    • Jack In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself.
    • Jack In the harpsichord, an intermediate piece communicating the action of the key to the quill; -- called also hopper.
    • Jack Money. "The gilt of France."
    • Jack (Zoöl) The jurel.
    • Jack The knave of a suit of playing cards.
    • Jack The male of certain animals, as of the ass.
    • Jack 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."
    • Jack (Zoöl) The wall-eyed pike.
    • v. i Jack To hunt game at night by means of a jack. See 2d Jack n., 4, n.
    • v. t Jack To move or lift, as a house, by means of a jack or jacks. See 2d Jack n., 5.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: The largest single-ticket jackpot winner in history is Jack Whittaker Jr. of West Virginia. In December 2002 he had the sole winning ticket for a $314.9 million jackpot in the U.S. Powerball lottery.
    • n jack [capitalized] An abbreviation or diminutive of the name Jacob, now regarded as a nickname or diminutive of the name John.
    • n jack A young man; a fellow: used with jill, a young woman, both being commonly treated as proper names.
    • n jack [cap, or lowercase] A saucy or impertinent fellow; an upstart; a coxcomb; a jackanapes; a sham gentleman: as, jack lord, jack gentleman, jack meddler, and similar combinations.
    • n jack [capitalized] A familiar term of address used among sailors, soldiers, laborers, etc.; hence, in popular use (commonly Jack Tar), a sailor.
    • n jack Same as jack in the water (which see, below).
    • n jack [lowercase or cap.] A figure which strikes the bell in clocks: also called jack of the clock or clock-house: as, the two jacks of St. Dunstan's.
    • n jack Any one of the knaves in a pack of playing-cards.
    • n jack The male of certain animals; specifically, a male ass; especially, an ass kept for getting mules from mares; a jackass.
    • n jack A name of several different fishes. A pike, as Esox lucius or a related species; especially, a small pike, or pickerel. Also jack-fish.
    • n jack A percoid fish, Stizostedium vitreum, the pike-perch.
    • n jack A scorpænoid fish. Sebastichthys or Sebastodes paucispinis, better known as boccaccio.
    • n jack One of several caran-goid fishes, especially Caranx pisquetos, also called buffalo-jack, hickory-jack, and jack-fish; also, Seriola carolinensis.
    • n jack The pampano, Trachynotus carolinus.
    • n jack The jackdaw, Corvus monedula.
    • n jack The jack-curlew, Numenius hudsonius.
    • n jack A kind of pigeon; a jacobin.
    • n jack One of various convenient implements or mechanical contrivances obviating the need of an assistant: used alone or compounded with some other word designating the special purpose of the implement or some other distinguishing circumstance: as, a pegging-jack; a shackle-jack, or thill-jack. Specifically— A bootjack.
    • n jack A rock-lever or oscillating lever. Such levers are used in stocking-frames, in knitting-machines, and in other machinery. Their function is the actuation of other moving parts to produce specific results at proper periods.
    • n jack In spinning, a bobbin and frame operating on the sliver from the carding-machine and passing the product to the roving-machine.
    • n jack In weaving, same as heck-box.
    • n jack In the harpsichord, clavichord, pianoforte, and similar instruments, an upright piece of wood at the inner or rear end of each key or digital, designed to bring the motion of the latter to bear upon the string. In the harpsichord and spinet the jack carries a quill or spine by which the string is twanged; in the clavichord it terminates in a metal tangent by which the string is pressed; and in the pianoforte it merely transmits the motion of the key to the hammer.
    • n jack A wooden frame on which wood is sawed; a sawbuck or sawhorse.
    • n jack In mining: A wooden wedge used to split rocks after blasting; a gad. A kind of water-engine, turned by hand, for use in mines.
    • n jack A portable cresset or fire-pan used for hunting or fishing at night. Also called jack-lamp, jack lantern, jack-light
    • n jack A tin case in which the safety-lamp is carried by coalminers in places where the current of air is very strong.
    • n jack In telegraphy and teleph, a terminal consisting of a spring-clip, by means of which instruments can be expeditiously introduced into the circuit. In telephones such terminals are sometimes used at exchanges for allowing the lines of different subscribers to be quickly connected. The connection is made by means of a wire cord on the ends of which are metallic wedges covered on one side with insulating material. These wedges, called jack-knives or simply jacks, are inserted into the terminals of the lines to be connected. Also called spring-jack.
    • n jack A pitcher, formerly of waxed leather, afterward of tin or other metal; a black-jack.
    • n jack A half-pint; also, a quarter of a pint.
    • n jack In the game of bowls, an odd bowl thrown out for a mark to the players.
    • n jack A flag showing the union only: used by those nations whose national standard contains a union, as Great Britain and the United States. The British jack is a combination in red, white, and blue of the crosses of St. George, St. Andrew, and St. Patrick, and dates from 1801. In the United States naval service the jack is a blue flag with a white five-pointed star for each State in the Union. It is hoisted on a jack-staff at the bowsprit-cap when in port, and is also used as a signal for a pilot when shown at the fore. See union jack, under union.
    • n jack A horizontal bar or crosstree of iron at the topgallantmast-head, to spread the royal-shrouds. Also called jack-crosstree.
    • n jack A kind of schooner-rigged vessel of from 10 to 25 tons, used in the Newfoundland fisheries. A jack is generally full and clumsy, with no overhang to the counter, and carries a mainsail, foresail, and jib, sometimes also a small mainstaysail.
    • n jack [capitalized] A Jacobite. [Cant.] In the quotation it is used with a punning reference to the flag. See def. 15.
    • n jack A farthing.
    • n jack A card-counter.
    • n jack A seal. Also jark, [Old slang.]
    • n jack The hickory-shad, Pomolobus mediocris.
    • n jack [It is sometimes explained as the fish called sole, and sometimes as a dish warmed up a second time.]
    • jack To operate on with a jack; lift with a jack.
    • jack To hunt with a jack. See jack, n., 11 .
    • jack To use a jack in hunting or fishing; seek or find game by means of a jack.
    • n jack A coat of fence of cheap make worn by foot-soldiers, yeomen, and the like. The word is used indiscriminately for the brigandine, gambeson, and scale-coat, and is, in short, applied to any defensive garment made of two folds of leather or linen with something between them. (Burges and de Cosson.)
    • n jack Same as jack-tree.
    • n jack The fruit of the jack-tree: same as jackfruit.See jack-tree.
    • n jack A Jacqueminot rose. Also Jacque.
    • n jack Same as black-jack. 3.
    • n jack The jonquil, Narcissus jonquilla.
    • jack In leather manufacturing, to roll by means of a roller attached to an arm.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: The song Take Me Out to the Ballgame was written by Jack Norworth and Albert von Tilzer.
    • n Jack jak used as a familiar name or diminutive of John: a saucy or paltry fellow: a sailor: any instrument serving to supply the place of a boy or helper, as a bootjack for taking off boots, a contrivance for turning a spit (smoke-jack, roasting-jack), a screw for raising heavy weights, a figure which strikes the bell in clocks: the male of some animals: a young pike: a support to saw wood on: a miner's wedge: a flag displayed from the bowsprit of a ship: a leather pitcher or bottle: a coat of mail:
    • n Jack jak a tree of the East Indies of the same genus as the bread-fruit tree.
    • n Jack jak (coll.) a knave in cards: the small white ball that forms the aim in bowls
    • ***


  • Napoleon Hill
    “The jack-of-all-trades seldom is good at any. Concentrate all of your efforts on one definite chief aim.”
  • A. A. Milne
    A. A. Milne
    “No doubt Jack the Ripper excused himself on the grounds that it was human nature.”
  • Benicio Del Toro
    Benicio Del Toro
    “I'm not Jack Nicholson. I'm not Brando. But I do mumble.”
  • German Proverb
    German Proverb
    “What little Jack does not learn, big John will never.”
  • Proverb
    “A jack of both sides, is before long, trusted by nobody, and abused by both parties.”
  • Source Unknown
    Source Unknown
    “All work and no play makes Jack a dull boy, and Jill a wealthy widow.”


Before you can say Jack Robinson - The term Jack Robinson represents 'a short amount of time'. When you do something before you can say Jack Robinson, you do it very quickly.
Every man jack - If every man jack was involved in something, it is an emphatic way of saying that absolutely everybody was involved.
Jack Frost - If everything has frozen in winter, then Jack Frost has visited.
Jack the Lad - A confident and not very serious young man who behaves as he wants to without thinking about other people is a Jack the Lad.
Jack-of-all-trades - A jack-of-all-trades is someone that can do many different jobs.


Webster's Revised Unabridged Dictionary
F. Jacques, James, L. Jacobus, Gr. , Heb. Ya 'aqōb, Jacob; prop., seizing by the heel; hence, a supplanter. Cf. Jacobite Jockey
Chambers's Twentieth Century Dictionary
Fr. Jacques, the most common name in France, hence used as a substitute for John, the most common name in England; but it is really=James or Jacob—L. Jacobus.


In literature:

You know we haven't been up for two or three weeks, Jack.
"The Radio Boys with the Revenue Guards" by Gerald Breckenridge
This expression, "rough weather," is not original, but is borrowed from Sailor Jack, whom you soon shall know nearly as well as the two D's did.
"Donald and Dorothy" by Mary Mapes Dodge
Until the war, Jack was always at call.
"The Education of Eric Lane" by Stephen McKenna
And Jack thinks so, too.
"The Lightning Conductor Discovers America" by C. N. (Charles Norris) Williamson and A. M. (Alice Muriel) Williamson
She has been ill a long time, and must have a jack-o'-lantern for Thanksgiving.
"Boys and Girls Bookshelf (Vol 2 of 17)" by Various
This significant remark of Mr. Copland's meant that Jack would be prevented from going.
"Soldiers of the Queen" by Harold Avery
Living thus among the only mild, courteous, and refined people he had ever known, Jack insensibly altered and improved.
"Wild Justice: Stories of the South Seas" by Lloyd Osbourne
He did not suppose for a moment that his wife was in love with Jack De Baron, or Jack with his wife.
"Is He Popenjoy?" by Anthony Trollope
Oh, girls are such fools, Jack!
"The Atlantic Monthly, Volume 15, No. 89, March, 1865" by Various
Jack Stormways was always prepared.
"Motor Boat Boys Down the Coast" by Louis Arundel

In poetry:

And that is the call of the Yukon
Calling to you - "Say when,"
Like a reckless yid calls solo on ace
King, Queen, Jack and ten.
"Call Of The Yukon" by Billy Bennett
Minnie thinks her Jack is noble
Tho’ he takes a "whiskey slug!"
Minnie’s nose Jack thinks is piquant,
When in truth its only pug.
"Fools" by Joseph Warren Watson
An ounce or more of Turkish lead,
He got his wounds at Sulva Bay
They’ve brought the Union Jack to spread
Upon him when he goes away.
"Screens (In a Hospital)" by Winifred Mary Letts
How swiftly was I pulled into being
The jumping jack, the dancing chicken,
Becoming nothing but a scream to God
With no hope of what He was thinking.
"Dance Of Death" by Franz Werfel
Of a mouldering tree!
Here's at you, once more.
You Apes! You Jack-fools!
You can show me the door,
And jeer at my ways,
But you're pinked to the core.
"The Foreigner" by Amy Lowell
The spirits of the forest,
They hold me, heart and hand--
And, oh! the bird they send by light,
The jack-o'-lantern gleam by night,
To guide to Fairyland!
"Wood-Words" by Madison Julius Cawein

In news:

Use these simple strategies learned from Black Jack to turbo charge your marketing results.
Jack Fusco, Rocco Monaco, Jerry Seman and Bill Sferra recently got together to talk about the 35th anniversary of Black Monday.
Jack White's latest discovery: A psyche-folk-pop Detroit two-piece with a penchant for the Ukraine.
Black Jack ' after a match.
' Black Jack ' after a match VIT_BlackJack 2.
' Black Jack ' after a match 201208082.
Jack Lemmon, NEEDS, ONE, San Diego.
Of all the gifts possessed by that supreme jack-of-all-show-business trades, Sir Noel Coward, none surpassed his gift for friendship.
Once there was a haunted house, and in it lived a young Jack-o-Lantern who was still learning to be scary.
Jack Wolfskin Mens: Jack Wolfskin Texapore Chaquetas: Jack Wolfskin ASCENSO Hombres chaqueta PHANTOM.
Set to replace Jeremy Jordan as "Jack Kelly" in the popular Disney musical Newsies, Corey Cott took the stage at the Aug 9 installment of Broadway in Bryant Park and sampled Jack's signature song, "Santa Fe".
Some 5,000 carved pumpkins are on display for this year's Jack-o€™-lantern Spectacular, one of the nation's largest jack-o€™-lantern shows.
Jack L Gish & Associates Inc. Home Gomez v Jack L.
Boxing match between Jack Dempsey (William Harrison 1895 – 1983) and Jack Sharkey aka 'The Boston Cob' or the 'Sobbing Sailor.
Jack Dempsey fighting Jack Sharkey in 1927.

In science:

It has been verified for Schur functions [T], Kingman branching [Kin], and Jack polynomials [KeOOl], but remains open for the general case of Macdonald polynomials.
Random matrix theory over finite fields: a survey
KeOOl] Kerov, S.V., Okounkov, A., and Olshanksi, G., The boundary of Young graph with Jack edge multiplicities, Intern.
Random matrix theory over finite fields: a survey
Olshanski, The boundary of Young graph with Jack edge multiplicities, Internat.
Combinatorial formula for Macdonald polynomials, Bethe Ansatz, and generic Macdonald polynomials
Olshanski, Asymptotics of Jack polynomials as the number of variables goes to infinity, Internat.
Combinatorial formula for Macdonald polynomials, Bethe Ansatz, and generic Macdonald polynomials
Kaneko, “Selberg integrals and hypergeometric functions associated with Jack polynomials”, SIAM J.
Random matrix theory and discrete moments of the Riemann zeta function