DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   ruler
       n 1: a person who rules or commands; "swayer of the universe"
            [syn: ruler, swayer]
       2: measuring stick consisting of a strip of wood or metal or
          plastic with a straight edge that is used for drawing
          straight lines and measuring lengths [syn: rule, ruler]