A boomerang is a thrown tool, typically constructed as a flat airfoil, that is designed to spin about an axis perpendicular to the direction of its flight. A returning boomerang is designed to return to the thrower. It is well known as a weapon used by Indigenous Australians for hunting.
Boomerangs have been historically used for hunting, as well as a sport, and entertainment. They are commonly thought of as an Australian icon.(Wikipedia)