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  • noun
    A device for lifting heavy objects, especially one for raising the axle of a motor vehicle off the ground so that a wheel can be changed or the underside inspected.
    A playing card bearing a representation of a soldier, page, or knave, normally ranking next below a queen.
    A socket with two or more pairs of terminals designed to receive a jack plug.
    In lawn bowling, the small ball at which the players aim.
    A game played by tossing and catching small round pebbles or star-shaped pieces of metal or plastic.

    A lumberjack.
    A steeplejack.
    The figure of a man striking the bell on a clock.
    A small version of a national flag flown at the bow of a vessel in harbor to indicate its nationality. (At daylight we hoisted the jack for a pilot and a Delaware pilot came off, Boat C, but couldn't take us to New York.)
    A device for turning a spit. (When running a spit from a weight driven clockwork jack, it is essential to ensure that the joint or bird is properly centred, or the spit may stop running.)
    A part of the mechanism in a spinet or harpsichord that connects a key to its corresponding string and causes the string to be plucked when the key is pressed down.
    A marine fish that is typically laterally compressed with a row of large spiky scales along each side. Jacks are important in many places as food or game fish.
    The male of some animals, especially a merlin or an ass. (A mule results from a cross between a female horse, or mare, and a male donkey, or jack.)
    Used in names of animals that are smaller than similar kinds, e.g., jacksnipe. (The Jack Snipe is an extremely difficult bird to see, partly because they are not very common but mostly because they are so well-camouflaged they will often sit unnoticed and let you walk past them.)
    short for jack shit
    short for jackrabbit
  • noun
    another term for blackjack (sense 5)
    A sleeveless padded tunic worn by foot soldiers.
  • adjective
    Tired of or bored with someone or something.


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