1. the most important person in a group or organization, especially one involved in illegal activities
Usage: informal
2. a vertical bolt used as a pivot in the front axle of a vehicle
Usage: automotive
3. the front pin in bowling that must be knocked down to score a strike
Usage: bowling

Examples

• The police arrested the drug kingpin after a long investigation.
• He was considered the kingpin of the smuggling operation.
• The mechanic replaced the worn kingpin in the truck’s front axle.
• She aimed directly at the kingpin to get a strike.
• The kingpin fell, taking down several other pins with it.
• Without their kingpin, the criminal organization quickly fell apart.