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English definition of “jack”

jack

noun [C] (EQUIPMENT)    /dʒæk/
a piece of equipment that can be opened slowly under a heavy object such as a car in order to raise it off the ground: You need a car jack in order to change a wheel.Machinery and machinesHousehold equipment and domestic chores
(Definition of jack noun (EQUIPMENT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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