CHAMBER, in building, a member of a lodging, or piece of an apartment, ordinarily intended for sleeping in; and called by the Latins cubiculum. The word comes from the Latin camera; and that, according to Nicod, from the Greek καμάρα, vault or curve; the term chamber being originally confined to places arched over.
A complete apartment is to consist of a hall, anti-chamber, chamber, and cabinet.