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]

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "chambermaid":
   abigail, amah, au pair girl, ayah, betweenmaid, biddy, chaperon,
   companion, cook, duenna, femme de chambre, fille de chambre,
   gentlewoman, girl, handmaid, handmaiden, hired girl, housemaid,
   kitchenmaid, lady-help, lady-in-waiting, live-in maid,
   live-out maid, maid, maidservant, nursemaid, parlormaid,
   scullery maid, servant girl, servitress, soubrette, tweeny,
   upstairs maid, waiting maid, wench