kingpin Hear it!

kingpin definition

king·pin (-pin′)

noun

  1. a vertical pin attached to some axles to serve as the axis for a wheel spindle, so that the wheel may be turned for steering
  2. the headpin or the center pin in bowling, tenpins, etc.
  3. Informal the main or essential person or thing

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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