The Collaborative International Dictionary of English v.0.48:

Soubrette \Sou`brette"\, n. [F.]
   A female servant or attendant; specifically, as a term of the
   theater, a lady's maid, in comedies, who acts the part of an
   intrigante; a meddlesome, mischievous female servant or young
   woman.
   [1913 Webster]

WordNet (r) 3.0 (2006):

soubrette
    n 1: a pert or flirtatious young girl
    2: a minor female role as a pert flirtatious lady's maid in a
       comedy