The Collaborative International Dictionary of English v.0.48:

Refrigerator \Re*frig"er*a`tor\ (-?`t?r), n.
   That which refrigerates or makes cold; that which keeps cool.
   Specifically:
   (a) A box or room for keeping food or other articles cool,
       usually by means of ice.
   (b) An apparatus for rapidly cooling heated liquids or
       vapors, connected with a still, etc.
       [1913 Webster]

   Refrigerator car (Railroad), a freight car constructed as a
      refrigerator, for the transportation of fresh meats, fish,
      etc., in a temperature kept cool by ice.
      [1913 Webster]

WordNet (r) 3.0 (2006):

refrigerator car
    n 1: a freight car that is equipped with refrigeration system