WordNet (r) 3.0 (2006):

Gustavus Adolphus
    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, Gustavus II, Gustavus
         Adolphus]