1. A room used for private living, conversation, consultation, or deliberation, in contrast to more public and formal activities. Also see bedroom, boudoir, cabinet, closet, den, parlor, solar, study. 2. A room for such use which has acquired public importance, e.g., the senate chamber, an audience chamber. 3. (Brit., pl.) A suite of rooms for private dwelling. 4. (pl.) A suite of rooms for deliberation and consultation (juristic). 5. A space equipped or designed for a special function, mechanical or technological, e.g., a torture chamber, a combustion chamber.