DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   preserver
       n 1: a skilled worker who is employed to restore or refinish
            buildings or antique furniture [syn: refinisher,
            renovator, restorer, preserver]
       2: a cook who preserves fruits or meat
       3: someone who keeps safe from harm or danger
       4: rescue equipment consisting of a buoyant belt or jacket to
          keep a person from drowning [syn: life preserver,
          preserver, flotation device]