DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   timer
       n 1: a timepiece that measures a time interval and signals its
            end
       2: (sports) an official who keeps track of the time elapsed
          [syn: timekeeper, timer]
       3: a regulator that activates or deactivates a mechanism at set
          times