DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   sachem
       n 1: a political leader (especially of Tammany Hall)
       2: a chief of a North American tribe or confederation
          (especially an Algonquian chief) [syn: sachem, sagamore]