jack

[ jak ]

/ dʒæk /

noun

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.

one of a set of small metal objects having six prongs, used in the game of jacks.
one of any other set of objects, as pebbles, stones, etc., used in the game of jacks.
jacks,(used with a singular verb) a children's game in which small metal objects, stones, pebbles, or the like, are tossed, caught, and moved on the ground in a number of prescribed ways, usually while bouncing a rubber ball.

any of several carangid fishes, especially of the genus Caranx, as C. hippos (crevalle jack or jack crevalle), of the western Atlantic Ocean.

Slang. money: He won a lot of jack at the races.

Slang: Vulgar. jack shit.

Nautical.

a small flag flown at the jack staff of a ship, bearing a distinctive design usually symbolizing the nationality of the vessel.
Also called jack crosstree. either of a pair of crosstrees at the head of a topgallant mast, used to hold royal shrouds away from the mast.

(initial capital letter) a sailor.

a lumberjack.

applejack.

jack rabbit.

a jackass.

jacklight.

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.

Theater. brace jack.

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).

Slang. to mess up, ruin, or injure (usually followed by up): The paint job was all jacked up.I jacked my shoulder when I fell.

to jacklight.

verb (used without object)

to jacklight.

adjective

Carpentry. having a height or length less than that of most of the others in a structure; cripple: jack rafter; jack truss.

Verb Phrases

jack off, Slang: Vulgar. to masturbate.

Nearby words

jacaranda, jacareí, jacarta, jacaré, jacinth, jack, jack arch, jack bean, jack block, jack chain, jack crevalle

Idioms

every man jack, everyone without exception: They presented a formidable opposition, every man jack of them.

Origin of jack

1350–1400; Middle English jakke, Jakke used in addressing any male, especially a social inferior, variant of Jakken, variant of Jankin, equivalent to Jan John + -kin -kin; extended in sense to anything male, and as a designation for a variety of inanimate objects

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for jack off (1 of 4)

Jack

/ (dʒæk) /

noun

I'm all right, Jack British informal

a remark indicating smug and complacent selfishness
(as modifier)an ``I'm all right, Jack'' attitude

British Dictionary definitions for jack off (2 of 4)

jack

/ (dʒæk) /

noun

a man or fellow

a sailor

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 nationalityCompare 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

the jack Australian slang venereal disease

adjective

jack of Australian slang tired or fed up with (something)

verb (tr)

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

Also: jacklight US and Canadian to hunt (fish or game) by seeking them out or dazzling them with a flashlight

Word Origin for jack

C16 jakke, variant of Jankin, diminutive of John

British Dictionary definitions for jack off (3 of 4)

jack

jak

/ (dʒæk) /

noun

short for jackfruit

Word Origin for jack

C17: from Portuguese jaca; see jackfruit

British Dictionary definitions for jack off (4 of 4)

jack

/ (dʒæk) /

noun

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

Word Origin for jack

C14: from Old French jaque, of uncertain origin

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Idioms and Phrases with jack off (1 of 2)

jack off

see jerk off.

Idioms and Phrases with jack off (2 of 2)

jack

In addition to the idioms beginning with jack

jack off
jack up

also see:

before you can say Jack Robinson

jack

noun

verb (used with object)

verb (used without object)

adjective

Verb Phrases

RELATED CONTENT

Nearby words

Idioms

Origin of jack

British Dictionary definitions for jack off (1 of 4)

Jack

noun

British Dictionary definitions for jack off (2 of 4)

jack

noun

adjective

verb (tr)

Word Origin for jack

British Dictionary definitions for jack off (3 of 4)

jack

jak

noun

Word Origin for jack

British Dictionary definitions for jack off (4 of 4)

jack

noun

Word Origin for jack

Idioms and Phrases with jack off (1 of 2)

jack off

Idioms and Phrases with jack off (2 of 2)

jack