jack Definition in the Cambridge English Dictionary
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Definition of “jack” - English Dictionary

Definition of "jack" - American English Dictionary

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jacknoun [C]

 us   /dʒæk/

jack noun [C] (DEVICE)

a ​device used to ​raise and ​hold something ​heavy off the ​ground, esp. one for ​raising a ​vehicle so that a ​tire can be ​changed

jack noun [C] (CARD)

a ​playingcard that has a ​picture of a man on it and has a ​lowervalue than the ​cardsshowing a ​king or ​queen: the jack of ​diamonds

jack noun [C] (ELECTRICITY)

a ​hole into which a ​wireconnected to a ​piece of ​electricalequipment can be ​plugged so that the ​equipment can ​operate: a ​microphone jack
(Definition of jack from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "jack" - British English Dictionary

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jacknoun [C]

uk   us   /dʒæk/

jack noun [C] (EQUIPMENT)

a ​piece of ​equipment that can be ​openedslowly under a ​heavyobject such as a ​car in ​order to ​raise it off the ​ground: You need a ​car jack in ​order to ​change a ​tyre.

jack noun [C] (CARD)

(also knave) a ​playingcard with a ​picture of a man on it. It has a ​lowervalue than the ​cardsshowing a ​king or ​queen: the jack of ​clubs

jack noun [C] (BALL)

a ​smallball towards which other ​balls are ​rolled or ​thrown in the ​games of bowls or boules

jack noun [C] (ELECTRICAL)

a ​connection between two ​pieces of ​electricalequipment
(Definition of jack from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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