The Collaborative International Dictionary of English v.0.48:

Refrigeration \Re*frig`er*a"tion\ (-?"sh?n), n. [Cf. F.
   r['e]frig['e]ration, L. refrigeratio.]
   The act or process of refrigerating or cooling, or the state
   of being cooled.
   [1913 Webster]

WordNet (r) 3.0 (2006):

refrigeration
    n 1: the process of cooling or freezing (e.g., food) for
         preservative purposes [syn: refrigeration,
         infrigidation]
    2: deliberately lowering the body's temperature for therapeutic
       purposes; "refrigeration by immersing the patient's body in a
       cold bath"