1

jack

noun \ ˈjak \
Updated on: 20 Nov 2017

Definition of jack

plural jacks
1 a jacks plural in form but singular in construction : a game played with a set of small objects that are tossed, caught, and moved in various figures
b : a small 6-pointed metal object used in the game of jacks
2 a : a playing card carrying the figure of a soldier or servant and ranking usually below the queen
b : jackpot 1b(2)
3 : any of various usually mechanical devices: such as
a : a usually portable mechanism or device for exerting pressure or lifting a heavy body a short distance
b : a device for turning a spit
4 : a female fitting in an electric circuit used with a plug to make a connection with another circuit
5 a : man usually used as an intensive in such phrases as every man jack
b often capitalized : sailor
c (1) : servant, laborer
(2) : lumberjack
6 : something that supports or holds in position: such as
a : an iron bar at a topgallant masthead to support a royal mast and spread the royal shrouds
b : a wooden brace fastened behind a scenic unit in a stage set to prop it up
7 a : any of several fishes; especially : any of various carangids
b : a male donkey
d : any of several birds (such as a jackdaw)
8 a : a small white target ball in lawn bowling
b : a small national flag flown by a ship
9 slang : money
10 a : applejack
b : brandy
11 : jackknife 2
13 US slang : anything at all used in negative constructions
  • In short, Dinger or Homer or whoever it was who wrote the Odyssey didn't know jack about travel.
  • —Steve Rushin

Examples of jack in a Sentence

  1. I'd buy that watch, but I don't have the jack right now.

  2. a Portuguese ship flying the national jack

Recent Examples of jack from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'jack.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of jack

Middle English Jacke, familiar term of address to a social inferior, nickname for Johan John


2

jack

verb

Definition of jack

transitive verb
1 a : to move or lift by or as if by a jack
b : to raise the level of usually used with up
  • jack up the price
c : to take to task
2 : to hunt or fish for at night with a jacklight
intransitive verb
: to hunt or fish at night with a jacklight

jacker

noun

Recent Examples of jack from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'jack.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of jack

circa 1841



JACK Defined for English Language Learners

jack

noun

Definition of jack for English Language Learners

  • : a device used for lifting something heavy (such as a car)

  • : a playing card that has a picture of a soldier or servant and that is worth more than a ten and less than a queen

  • : a small opening where something connects with a wire to something else


JACK Defined for Kids

1

jack

noun \ ˈjak \

Definition of jack for Students

1 : a device for lifting something heavy a short distance
2 : a playing card with the picture of a young man
3 : a small six-pointed usually metal object used in a children's game ( jacks )
4 : a socket used with a plug to connect one electric circuit with another

2

jack

verb

Definition of jack for Students

jacked; jacking
: to move or lift with a special device
  • We need to jack up the car.


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