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.
The senior operating officer or manager of an organization or corporation. Executive director titles (EDs) are frequently reserved for the heads of non-profit organizations, and their duties are similar to a chief executive officer's (CEO) duties of a for-profit company.