executive

adj

1. Designed or fitted for execution, or carrying into effect.
2. Of, pertaining to, or having responsibility for the day-to-day running of an organisation, business, country, etc.

   “executive act”

   “an executive officer”

   “executive government”

   “When vacancies happen in the Representation from any State, the Executive Authority thereof shall issue Writs of Election to fill such Vacancies.”

   “At the earliest practicable date military administration will cease, and will be replaced by civil administration in the form of Crown Colony Government. There will, therefore, be in the first instance, in each of the new Colonies, a Governor and an Executive Council, composed of the principal officials, with a Legislative Council consisting of a certain number of official members to whom a nominated unofficial element will be added.”

3. Exclusive.

   “She works in an office with an executive bathroom.”

noun

1. A chief officer or administrator, especially one who can make significant decisions on their own authority.

   “Such, Mr. Cleveland, is the real character of the government, of which you are the nominal head. Such are, and have been, its lawmakers. Such are, and have been, its judges. Such have been its executives. Such is its present executive. Have you anything to say for any of them?”

   “But as we approach the question of presidential power, we half overcome mental hazards by recognizing them. The opinions of judges, no less than executives and publicists, often suffer the infirmity of confusing the issue of a power's validity with the cause it is invoked to promote, of confounding the permanent executive office with its temporary occupant.”

2. The branch of government that is responsible for enforcing laws and judicial decisions, and for the day-to-day administration of the state.
3. A process that coordinates and governs the action of other processes or threads; supervisor.

   “1973, ACM Special Interest Group in Operating Systems, Fourth Symposium on Operating System Principles The second phase of the executive development proceeded through two steps as stated in Section 2. First, a failsoft executive was developed providing automatic failure detection and recovery […]”