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.
executive (Adjective) Of, pertaining to, or having responsibility for the day-to-day running of an organisation, business, country, etc.; as, an executive act, an executive officer, executive government.