What does "bedchamber" mean?

Bedchamber: A chamber for a bed; an apartment form sleeping in. Shak. Lords of the bedchamber, eight officers of the royal household, all of noble families, who wait in turn a week each. [Eng.] -- Ladies of the bedchamber, eight ladies, all titled, holding a similar official position in the royal household, during the reign of a queen. [Eng.]