n.1 an organized body of persons.
2 a principal division of a cavalry regiment or armoured formation, consisting of two troops.
3 a detachment of warships employed on a particular duty.
4 a unit of the Royal Air Force with 10 to 18 aircraft.
Phrases and idioms:
Squadron Leader the commander of a squadron of the Royal Air Force, the officer next below Wing Commander.
Etymology: It. squadrone (as SQUAD)