The Collaborative International Dictionary of English v.0.48:

Chaise \Chaise\ (sh[=a]z), n. [F. chaise seat, or chair, chaise
   or carriage, for chaire, from a peculiar Parisian
   pronunciation. See Chair.]
   1. A two-wheeled carriage for two persons, with a calash top,
      and the body hung on leather straps, or thorough-braces.
      It is usually drawn by one horse.
      [1913 Webster]

   2. Loosely, a carriage in general. --Cowper.
      [1913 Webster]

WordNet (r) 3.0 (2006):

chaise
    n 1: a long chair; for reclining [syn: chaise longue,
         chaise, daybed]
    2: a carriage consisting of two wheels and a calash top; drawn
       by a single horse [syn: chaise, shay]