The highest-ranking corporate officer or executive officer of a corporation, company, or agency, responsible for carrying out the policies of the board of directors on a day-to-day basis; CEO.
The most important person in an undertaking or organization.
The axis around which steered wheels pivot; a bolt that holds the axis in place—a kingbolt.
The bolt holding together the truck of a roller skate or skateboard.
The pivot or connector between a tractor and trailer in the fifth-wheel coupling of semi-trailer truck.
The pin at the centre of the triangle of bowling pins (originally the tallest pin in kayles). Sometimes also the headpin at the apex.