kingpin
1. the most important person in a group or undertaking • Syn: top banana, bigwig • Hypernyms: important person, influential person, personage 2. the front bowling pin in the triangular arrangement of ten pins • Syn: headpin • Hypernyms: bowling pin, pin 3. bolt that provides a steering joint in a motor vehicle • Syn: kingbolt, swivel pin • Hypernyms: bolt
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