a device with an air bag that emits a stream of air when squeezed together with two handles, used for blowing air into a fire

stoking up the fire with the bellows

an object or device with concertinaed sides to allow it to expand and contract, such as a tube joining a lens to a camera body

(of a person or animal) emit a deep loud roar, typically in pain or anger

he bellowed in agony

a deep roaring shout or sound

a bellow of rage