Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Origin: From the man's name Jack

jack

1 noun
     
Related topics: Cards, Other Sports, Technology, Tools
jack1 [countable]
1TZ a piece of equipment used to lift a heavy weight off the ground, such as a car, and support it while it is in the air:
a hydraulic jack
2DGC a card used in card games that has a man's picture on it and is worth less than a queen and more than a ten
a pair of jacks
3T an electronic connection for a telephone or other electric machine:
a phone jack
4
a)

jacks

[plural]DG a children's game in which the players try to pick up small objects called jacks while bouncing and catching a ball
b) DG a small metal or plastic object that has six points, used in this game
5DSO a small white ball at which players aim larger balls in the game of bowls
6

jack (shit)

American English spoken not polite a rude expression meaning anything at all:
He doesn't know jack shit about cars.

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary