(music) A genre of classical music written for a small group of instruments

A pressurised housing.

(government) The lower legislative chamber in a bicameral legislature; in many cases, the one that is directly elected and/or has more practical power, such as the power to raise and spend money.

(government) The upper legislative chamber in a bicameral legislature; usually smaller and having more restricted power than the lower chamber.

An orchestra of modest size, to play chamber music, yet larger than the various chamber ensembles named after their number of instruments (from duo to nonet)

plural of combustion chamber

plural of chamber orchestra

plural of lower chamber

plural of upper chamber

(geology) A large underground pool of molten rock lying under the surface of the earth's crust.