kingpin definition

  • noun:
    • Sports The innermost or main pin in an arrangement of bowling pins.
    • Sports See headpin.
    • The most important person or element in an enterprise or system.
    • See kingbolt.
    • The axis around which steered wheels pivot; a bolt that holds the axis in placeā€”a kingbolt.
    • The pin at centre of triangle of bowling pins (originally the tallest pin in kayles). Sometimes additionally the headpin at apex.
    • the most crucial individual in an undertaking or business.
    • The bolt keeping collectively the truck of a roller skate or skateboard.
    • the main person in friends or task
    • bolt that provides a steering joint in an auto
    • the front bowling pin in the triangular arrangement of ten-pins

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