1. A naval unit smaller than a fleet.

2. An armored cavalry unit subordinate to a regiment and consisting of two or more troops.

3. A cavalry or armored unit of a European army, corresponding to a company.

4. A basic tactical air force unit, subordinate to a group and consisting of two or more flights.

5. A multitude or horde: "Squadrons of flies like particles of dust danced up and down" (T.E. Lawrence).