The Collaborative International Dictionary of English v.0.48:

Chambermaid \Cham"ber*maid`\, n.
   1. A maidservant who has the care of chambers, making the
      beds, sweeping, cleaning the rooms, etc.
      [1913 Webster]

   2. A lady's maid. [Obs.] --Johnson.
      [1913 Webster]

WordNet (r) 3.0 (2006):

chambermaid
    n 1: a maid who is employed to clean and care for bedrooms (now
         primarily in hotels) [syn: chambermaid, fille de
         chambre]