kingpin
1. [ noun ] bolt that provides a steering joint in a motor vehicle
Synonyms: swivel_pin kingbolt
Related terms: bolt
2. [ noun ] the most important person in a group or undertaking
Synonyms: bigwig top_banana
Related terms: important_person
3. [ noun ] (games) the front bowling pin in the triangular arrangement of ten pins
Synonyms: headpin
Related terms: bowling_pin
Similar spelling:   kingcup
  kingfish
  kingbird
  kingship
  king_post