Definitions from Wiktionary ( )

▸ noun:  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.
▸ noun:  Any flexible container or enclosure, as one used to cover a moving joint.
▸ noun:  (informal or archaic) The lungs.
▸ noun:  (photography) Flexible, light-tight enclosures connecting the lensboard and the camera back.
▸ noun:  (figurative) That which fans the fire of hatred, jealousy, etc.
▸ verb:  (intransitive, transitive) To operate a bellows; to direct air at (something) using a bellows.
▸ verb:  (intransitive, figuratively) To expand and contract like a bellows.
▸ verb:  (transitive) To fold up like a bellows; to accordion.

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