WordNet (r) 3.0 (2006):
Frederick II n 1: king of Prussia from 1740 to 1786; brought Prussia military prestige by winning the War of the Austrian Succession and the Seven Years' War (1712-1786) [syn: Frederick II, Frederick the Great] 2: the Holy Roman Emperor who led the Sixth Crusade and crowned himself king of Jerusalem (1194-1250) [syn: Frederick II, Holy Roman Emperor Frederick II]