DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   CO
       n 1: an odorless very poisonous gas that is a product of
            incomplete combustion of carbon [syn: carbon monoxide,
            carbon monoxide gas, CO]
       2: a hard ferromagnetic silver-white bivalent or trivalent
          metallic element; a trace element in plant and animal
          nutrition [syn: cobalt, Co, atomic number 27]
       3: one who refuses to serve in the armed forces on grounds of
          conscience [syn: conscientious objector, CO]
       4: a state in west central United States in the Rocky Mountains
          [syn: Colorado, Centennial State, CO]