Any squadron operating in the waters or (in later use) airspace of its own country; specifically (with capital initials) a squadron of the U.S. Navy detailed to home defence (now historical).
Origin
Mid 18th century.
Definition of home squadron in US English:
home squadron
noun
Any squadron operating in the waters or (in later use) airspace of its own country; specifically (with capital initials) a squadron of the U.S. Navy detailed to home defence (now historical).