Meaning of “jack” in the English Dictionary

"jack" in British English

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jacknoun [ C ]

uk /dʒæk/ us /dʒæk/

(Definition of “jack” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"jack" in American English

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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 playing card that has a picture of a man on it and has a lower value than the cards showing a king or queen:

the jack of diamonds

jack noun [ C ] (ELECTRICITY)

a hole into which a wire connected to a piece of electrical equipment can be plugged so that the equipment can operate:

a microphone jack

(Definition of “jack” from the Cambridge Academic Content Dictionary © Cambridge University Press)