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.
Definition of executive. 1  1 : the executive branch of a government; also : the person or persons who constitute the executive magistracy of a state. 2  2 : a directing or controlling office of an organization. 3  3 : one that exercises administrative or managerial control.