any of various portable devices for raising or lifting heavy objects short heights, using various mechanical, pneumatic, or hydraulic methods.
Also called knave. Cards. a playing card bearing the picture of a soldier or servant.
Electricity. a connecting device in an electrical circuit designed for the insertion of a plug.
(initial capital letter) Informal. fellow; buddy; man (usually used in addressing a stranger):
Hey, Jack, which way to Jersey?
Also called jackstone. Games.
any of several carangid fishes, especially of the genus Caranx, as C. hippos (crevalle jack or jack crevalle) of the western Atlantic Ocean.
He won a lot of jack at the races.
Slang: Vulgar. .
(initial capital letter) a sailor.
a device for turning a spit.
a small wooden rod in the mechanism of a harpsichord, spinet, or virginal that rises when the key is depressed and causes the attached plectrum to strike the string.
Lawn Bowling. a small, usually white bowl or ball used as a mark for the bowlers to aim at.
Also called clock jack. Horology. a mechanical figure that strikes a clock bell.
a premigratory young male salmon.
Falconry. the male of a kestrel, hobby, or especially of a merlin.
verb (used with object)
to lift or move (something) with or as if with a jack (usually followed by up):
to jack a car up to change a flat tire.
Informal. to increase, raise, or accelerate (prices, wages, speed, etc.) (usually followed by up).
Informal. to boost the morale of; encourage (usually followed by up).
verb (used without object)
Carpentry. having a height or length less than that of most of the others in a structure; cripple:
jack rafter; jack truss.
jack off, Slang: Vulgar. to masturbate.
every man jack, everyone without exception:
They presented a formidable opposition, every man jack of them.
a defensive coat, usually of leather, worn in medieval times by foot soldiers and others.
a container for liquor, originally of waxed leather coated with tar.
a male given name, form of or .
(functioning as sing) a game in which bone, metal, or plastic pieces (jackstones) are thrown and then picked up in various groups between bounces or throws of a small ball Sometimes called knucklebones
a man or fellow
the male of certain animals, esp of the ass or donkey
a mechanical or hydraulic device for exerting a large force, esp to raise a heavy weight such as a motor vehicle
any of several mechanical devices that replace manpower, such as a contrivance for rotating meat on a spit
one of four playing cards in a pack, one for each suit, bearing the picture of a young prince; knave
(bowls) a small usually white bowl at which the players aim with their own bowls
(electrical engineering) a female socket with two or more terminals designed to receive a male plug (jack plug) that either makes or breaks the circuit or circuits
a flag, esp a small flag flown at the bow of a ship indicating the ship’s nationality Compare Union Jack
(nautical) either of a pair of crosstrees at the head of a topgallant mast used as standoffs for the royal shrouds
a part of the action of a harpsichord, consisting of a fork-shaped device on the end of a pivoted lever on which a plectrum is mounted
any of various tropical and subtropical carangid fishes, esp those of the genus Caranx, such as C. hippos (crevalle jack)
Also called jackstone. one of the pieces used in the game of jacks
short for applejack, bootjack, jackass, jackfish, jack rabbit, lumberjack
(US) a slang word for money
every man jack, everyone without exception
(Austral, slang) the jack, venereal disease
(Austral, slang) jack of, tired or fed up with (something)
to lift or push (an object) with a jack
(electrical engineering) to connect (an electronic device) with another by means of a jack and a jack plug
(US & Canadian) Also jacklight. to hunt (fish or game) by seeking them out or dazzling them with a flashlight
short for jackfruit
a short sleeveless coat of armour of the Middle Ages, consisting usually of a canvas base with metal plates
(archaic) a drinking vessel, often of leather
(Brit, informal) I’m all right, Jack
masc. proper name, 1218, probably an anglicization of Old French Jacques (which was a diminutive of Latin Jacobus; see Jacob), but in English the name always has been associated with Johan, Jan “John,” and some have argued that it is a native formation.
Alliterative coupling of Jack and Jill is from 15c. (Ienken and Iulyan). In England, applied familiarly or contemptuously to anybody (especially one of the lower classes) from late 14c. Later used especially of sailors (1650s; Jack-tar is from 1781). In U.S., as a generic name addressed to an unknown stranger, attested from 1889.
late 14c., jakke “a mechanical device,” from the masc. name Jack. The proper name was used in Middle English for “any common fellow” (mid-14c.), and thereafter extended to various appliances replacing servants (1570s). Used generically of men (jack-of-all-trades, 1610s), male animals (1620s, see jackass, jackdaw, etc.), and male personifications (1520s, e.g. Jack Frost, 1826).
As the name of a device for pulling off boots, from 1670s. The jack in a pack of playing cards (1670s) is in German Bauer “peasant.” Jack shit “nothing at all” is attested by 1968, U.S. slang. The plant jack-in-the-pulpit is attested by 1837. Jack the Ripper was active in London 1888. The jack of Union Jack is a nautical term for “small flag at the bow of a ship” (1630s).
1860, jack up “hoist, raise,” American English, from the noun (see jack (n.)). Figurative sense “increase (prices, etc.)” is 1904, American English. Related: Jacked; jacking. Jack off (v.) “to masturbate” is attested from 1916, probably from jack (n.) in the sense of “penis.”
ball the jack, heavy money, hijack, piece of change
[money sense probably fr the expression hard Jackson or hard Jackson money, referring to President Andrew Jackson and found by 1838; first verb sense perhaps related to mid-1800s British criminal slang jack, ”run away, escape,” or perhaps by folk etymology fr jank, an echoic companion of jink; compare jink-jank with yin-yang and zig-zag; stealing sense probably fr hijack and related to carjacking]
Man; friend; fellow; mac •Used in addressing any man, whatever his name: Man, he’s murder, Jack/ That supposed to be funny, jack? (1889+)
Nothing at all, zero; nada; jack shit: You don’t know jack squat about going to college these days
noun 1. (def 1). 2. .
[jak-skroo] /ˈdʒækˌskru/ noun 1. a for lifting consisting of a steadied by a threaded support and carrying a plate or other part bearing the load. /ˈdʒækˌskruː/ noun 1. another name for screw jack
noun, Slang: Vulgar. 1. anything at all; the least thing (usually used in the negative): He doesn’t know jack shit. noun phrase Nothing at all; diddly, zilch: They had it, but jack shit was what they had/ I didn’t know jackshit about it/ ”Ex-model” means jackshit (1970s+ Southern students)
[jak-shaft, -shahft] /ˈdʒækˌʃæft, -ˌʃɑft/ noun, Machinery. 1. Also called countershaft. a short , connected by belting, gears, etc., that transmits motion from a motor or engine to a machine or machines being driven (distinguished from ). 2. a on which an idle wheel or fairlead turns. /ˈdʒækˌʃɑːft/ noun 1. a short length of shafting that […]