Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A vertical bolt that joins the body of a wagon or other vehicle to its front axle and usually acts as a pivot. Also called kingpin.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The main bolt of a structure, especially the bolt in a motor vehicle that links the chassis to the axle, providing the steering pivot.

from the GNU version of the Collaborative International Dictionary of English

  • n. A vertical iron bolt, by which the forward axle and wheels of a vehicle or the trucks of a railroad car are connected with the other parts.

from The Century Dictionary and Cyclopedia

  • A large bolt connecting the fore part of a carriage with the fore axle. The axle rotates about it as a joint “when the carriage is turned.
  • A large bolt which passes through the truck and body-bolsters and center-plates of a carbody and the center of a truck.
  • Also kiny-pin.
  • n. An iron rod in a roof- or bridge-truss, used in place of a king-post to prevent the inclined members from allowing an increase of the distance between the tie and the compression pieces.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. bolt that provides a steering joint in a motor vehicle

Etymologies

king +‎ bolt (Wiktionary)

Examples

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