Definition of jack noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

JACK definition: any of various portable devices for raising or lifting heavy objects short heights, using various mechanical, pneumatic, or hydraulic methods. See examples of jack used in a sentence.

A jack is a device for lifting a heavy object off the ground, for example a car.

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  • any of various portable devices for raising or lifting heavy objects short heights, using various mechanical, pneumatic, or hydraulic methods: an automobile jack.
  • Order online for a fast and easy way to get all your Jack favs. From late-night cravings to all-day breakfast, your favorite burgers, tacos, and munchies are just a few clicks away.

    Any of various machines used to lift, hoist, or move something heavy a short distance. Hydraulic jack, automobile jack.

      Order online for a fast and easy way to get all your Jack favs. From late-night cravings to all-day breakfast, your favorite burgers, tacos, and munchies are just a few clicks away.

      Any of various machines used to lift, hoist, or move something heavy a short distance. Hydraulic jack, automobile jack.

        3 days ago · From Middle English Jackin, Jankyn, a popular pet form of John; rarely also an anglicized form of French Jacques (equivalent of Jacob and James). It can be also used as nickname for Jacob. …

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