What does "refrigerator" mean?

Refrigerator: 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. 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.