n. Primarily, a square; hence, a square body of troops; a body of troops drawn up in a square. (Mil.) A body of cavalry comprising two companies or troops, and averaging from one hundred and twenty to two hundred men. (Naut.) A detachment of vessels employed on any particular service or station, under the command of the senior officer; as, the North Atlantic Squadron. Flying squadron, a squadron of observation or practice, that cruises rapidly about from place to place. A group of airplanes in the Navy, Air Force or Army operating together under one command structure. A primary unit of command structure. Usually squadrons are segregated formed by primary mission roles with similar types of aircraft.