Definition of "jack"
- noun
A mechanical device used to raise and (temporarily) support a heavy object.
The card ranking between the ten and queen of any suit, picturing a knave or prince on its face. In some card games has a value of eleven based on its rank, but in many card games has a value of ten like the ten, queen, and king cards. Also called a knave.
A surface-mounted connector for electrical, especially telecommunications, equipment.
A small, six-pointed playing piece used in the game of jacks.
- verb
To use a jack.
To raise or increase.
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