Definition of AVAILABILITY. 1. : the quality or state of being available. 2. : an available person or thing.
Definition of EXECUTIVE OFFICER. : the officer second in command of a military or naval organization or vessel. ADVERTISEMENT. the officer second in command of a military or naval organization or vessel. ADVERTISEMENT.
An executive order is an order issued by the President of the U.S, the head of the executive branch of the federal government. This term also refers to an order issued by a governor of a state. An executive order can also be called a decree or orders-in-council.