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  1. JACK Definition & Meaning - Merriam-Webster

    The meaning of JACK is a game played with a set of small objects that are tossed, caught, and moved in various figures. How to use jack in a sentence.

  2. Jack (given name) - Wikipedia

    Jack is a given name of English origin, originally a diminutive of John.

  3. Jack in the Box

    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.

  4. JACK Definition & Meaning | Dictionary.com

    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.

  5. Jack - Wiktionary, the free dictionary

    Jan 22, 2026 · 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 …

  6. JACK definition in American English | Collins English Dictionary

    A jack is a device for lifting a heavy object, such as a car, off the ground. A jack is a playing card whose value is between a ten and a queen. A jack is usually represented by a picture of a young man. ...the …

  7. Jack - definition of jack by The Free Dictionary

    1. any of various portable devices for raising or lifting heavy objects short heights, using various mechanical, pneumatic, or hydraulic methods: an automobile jack.