Word forms: plural, 3rd person singular presenttense, plural jacks, present participle jacking, past tense, past participle jacked
1. countable noun
A jack is a device for lifting a heavy object off the ground, for example a car.
2. countable noun
A jack is a playing card whose value is between a ten and a queen. A jack is usually represented by a picture of a young man.
3. See also jack-of-all-trades, Union Jack
Phrasal verbs:
See jack in
See jack up
jack in British English1
(dʒæk)
noun
1.
a man or fellow
2.
a sailor
3.
the male of certain animals, esp of the ass or donkey
4.
a mechanical or hydraulic device for exerting a large force, esp to raise a heavy weight such as a motor vehicle
5.
any of several mechanical devices that replace manpower, such as a contrivance for rotating meat on a spit
6.
one of four playing cards in a pack, one for each suit, bearing the picture of a young prince; knave
7. bowling
a small usually white bowl at which the players aim with their own bowls
8. 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
9.
a flag, esp a small flag flown at the bow of a ship indicating the ship's nationality
Compare Union Jack
10. nautical
either of a pair of crosstrees at the head of a topgallant mast used as standoffs for the royal shrouds
11.
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
12.
any of various tropical and subtropical carangid fishes, esp those of the genus Caranx, such as C. hippos (crevalle jack)
13. Also called: jackstone
one of the pieces used in the game of jacks
14. short for applejack, bootjack, jackass, jackfish, jack rabbit, lumberjack
15. US a slang word for money
16. every man jack
17. the jack
adjective
18. jack of
verb(transitive)
19.
to lift or push (an object) with a jack
20. electrical engineering
to connect (an electronic device) with another by means of a jack and a jack plug
21. Also: jacklight US and Canadian
to hunt (fish or game) by seeking them out or dazzling them with a flashlight
Word origin
C16 jakke, variant of Jankin, diminutive of John
jack in British English2
or jak (dʒæk)
noun
short for jackfruit
Word origin
C17: from Portuguese jaca; see jackfruit
jack in British English3
(dʒæk)
noun
1.
a short sleeveless coat of armour of the Middle Ages, consisting usually of a canvas base with metal plates
2. archaic
a drinking vessel, often of leather
Word origin
C14: from Old French jaque, of uncertain origin
Jack in British English
(dʒæk)
noun
I'm all right, Jack
jack in American English
(dʒæk)
nounWord forms: pluraljacks or jack
1. [J-]; Informal
John1
2. [oftenJ-]
a. Obsolete
a common fellow or boy assistant
b.
a man or boy; fellow
sometimes used as a slang form of address
c. Rare
a sailor; jack-tar
d. US
a lumberjack
e.
a jack-of-all-trades
3.
a.
bootjack
b.
Monterey Jack
c.
smokejack
4.
a fruit-flavored alcoholic liquor, as applejack
5.
any of various machines used to lift, hoist, or move something heavy a short distance
hydraulic jack, automobile jack
6.
a wooden bar attached to each key of a harpsichord, etc. that raises the plectrum when the key is depressed
7.
a male donkey; jackass
8. US
jack rabbit
9.
any of various birds, as a jackdaw
10.
a.
any of a tropical, marine family (Carangidae) of predatory, silvery, percoid, game and food fishes with widely forked tails, including the pompanos and yellowtails
b.
jackfish
11. US, Slang, Obsolete
money
12. Electricity
a plug-in receptacle used to make electrical contact
13. Games
a.
a playing card with a conventionalized picture of a royal male servant or soldier on it; knave
b.
a small ball used as the center mark in lawn bowling
c.
any of the small stones or six-pronged metal pieces used in playing jack noun
14. US, Hunting
a torch or light used to attract fish or game at night
15. Nautical
a small flag usually flown on a ship's bow to show nationality, often, specif., union jack
verb transitive
16.
to raise by means of a jack
17. US
to hunt or fish for with a light
adjective
18.
male: of some animals
Idioms:
every man jack
jack around
jack off
jack up
Word origin
ME Jacke, Jake < OFr Jaque, Jaques < LL(Ec) Jacobus, Jacob
jack- in American English
(dʒæk)
1.
male
jackass
2.
large or strong
jackboot
3.
boy; fellow
used in hyphenated compounds
jack-in-the-box
Word origin
see jack
jack in Automotive Engineering
(dʒæk)
Word forms: (regular plural) jacks
noun
(Automotive engineering: Vehicle components, Bodywork, controls, and accessories)
A jack is a device for lifting a vehicle off the ground.
There was a truck there with a jack under the back wheel.
The car has built-in hydraulic jacks, which facilitate rapid tire changes.
Always keep a tire iron, spare tire, and car jack in the trunk of the car, in case of punctures.
jack in Electrical Engineering
(dʒæk)
Word forms: (regular plural) jacks
noun
(Electrical engineering: General)
A jack is a female socket with two or more terminals designed to receive a male plug thateither makes or breaks the circuit.
This type of product requires the user to plug and unplug the speaker cable intothese individual jacks.
The signal from the output jack is typically fed into a power amplifier or sound system mixing board.
A jack is a female socket with two or more terminals designed to receive a male plug thateither makes or breaks the circuit.