executive

(noun): A chief officer or administrator, especially one who can make significant decisions on their own authority.
(noun): The branch of government that is responsible for enforcing laws and judicial decisions, and for the day-to-day administration of the state.
(noun): A process that coordinates and governs the action of other processes or threads; supervisor.
(adjective): Designed or fitted for execution, or carrying into effect.
(adjective): Of, pertaining to, or having responsibility for the day-to-day running of an organisation, business, country, etc.
(adjective): Exclusive.