A boomerang is a flying tool with a curved shape used as a weapon or for sport.
A boomerang is usually thought of as a wooden device, although historically boomerang-like devices have also been made from bones. Modern boomerangs used for sport are often made from carbon fibre-reinforced plastics

Carbon fiber-reinforced polymer

Carbon-fiber-reinforced polymer or carbon-fiber-reinforced plastic , is a very strong and light fiber-reinforced polymer which contains carbon fibers. The polymer is most often epoxy, but other polymers, such as polyester, vinyl ester or nylon, are sometimes used...

 or other high-tech materials. Boomerangs come in many shapes and sizes depending on their geographic or tribal origins and intended function.

An important distinction should be made between returning boomerangs and non-returning boomerangs.