Definition

1. Noun:
   • The front bowling pin in the triangular arrangement of ten pins: In the sport of bowling, the kingpin is the central pin at the front of the triangle, which is the primary target.
   • A bolt that provides a steering joint in a motor vehicle: A mechanical part, also called a steering kingpin or king bolt, which is the pivot point for the steering mechanism in some vehicles.
   • The most important person in a group or undertaking: A metaphorical use referring to the central, indispensable, or leading figure in an organization or activity.

Usage Examples

• Noun (Bowling):
  • A good strike requires hitting the kingpin squarely.
  • The bowler aimed directly for the kingpin.
• Noun (Mechanical):
  • The mechanic replaced the worn kingpin on the old truck's front axle.
  • A faulty kingpin can cause serious steering problems.
• Noun (Person):
  • She is the kingpin of the entire research department.
  • The police arrested the alleged kingpin of the smuggling ring.

Advanced Usage

• "To be the kingpin": To hold the central and most important position.
  • In that industry, he is undisputedly the kingpin.
• Conceptual use: Can be applied to abstract concepts representing a central, crucial element.
  • Trust is the kingpin of any successful partnership.

Variants and Related Words

• King bolt (n): An alternative term for the mechanical steering pivot.
• Linchpin (n): A person or thing vital to an enterprise or organization. (Note: While similar, "linchpin" often emphasizes something that holds elements together, whereas "kingpin" emphasizes central importance or leadership).

Synonyms

• Leader: A person who leads or commands a group.
• Chief: The head or leader of an organization.
• Central figure: The most important or prominent person in a situation.
• Mainstay: A person or thing on which something else is based or depends.
• Pivot: The central point, pin, or shaft on which a mechanism turns.

Related Phrases

• Kingpin of an industry: The dominant or most influential person in a specific business sector.
  • He became the kingpin of the tech industry through innovation.

Related Idioms

• The kingpin falls: When the most important person in an organization is removed or fails.
  • With the arrest of its leader, the kingpin fell, and the organization collapsed.

Noun

1. the front bowling pin in the triangular arrangement of ten pins
2. bolt that provides a steering joint in a motor vehicle
3. the most important person in a group or undertaking