Source : WordNet®

Gustavus
     n 1: king of Sweden whose victories in battle made Sweden a
          European power; his domestic reforms made Sweden a
          modern state; in 1630 he intervened on the Protestant
          side of the Thirty Years' War and was killed in the
          battle of Lutzen (1594-1632) [syn: {Gustavus II}, {Gustavus
          Adolphus}]
     2: king of Sweden who established Lutheranism as the state
        religion (1496-1560) [syn: {Gustavus I}]