Chamber

Chamber can mean several things:

Chamber of commerce, a business network
Chambers of parliament, in politics
Chamber (comics), a superhero from Marvel Comics
Chamber music, a form of classical music
Chamber (firearms), the part of the gun's barrel in which the cartridge is placed
A room inside a building
Chambers (law), the rooms used by a barrister in a court
Combustion chamber, part of an engine in which fuel is burned

Other uses
Chambar, a town in Pakistan also spelled Chamber