- 1[countable] a device for raising heavy objects off the ground, especially vehicles, so that a wheel can be changed
- 2[countable] an electronic connection between two pieces of electrical equipment
- 3[countable] (in a deck of cards) a card with a picture of a young man on it, worth more than a ten and less than a queen the jack of clubs
- 4jacks [plural] a children's game in which players bounce a small ball and pick up small metal objects, also called jacks, before catching the ball see blackjack, flapjack, Union Jack Idioms
it is not healthy to spend all your time working; you need to relax too
a person who can do many different types of work, but who perhaps does not do them very well
Check pronunciation: jack