(1) A mechanical device that blows a strong current of air; used to make a fire burn more fiercely or to sound a musical instrument
- A device for delivering pressurized air in a controlled quantity to a controlled location. At its most simple terms a bellows is a container which is deformable in such a way as to alter its volume which has an outlet or outlets where one wishes to blow air.
- Any flexible container or enclosure, as one used to cover a moving joint.
- The lungs.
- Flexible, light-tight enclosures connecting the lensboard and the camera back.