Wordnet 3.0
NOUN (2)
1.
son of Frederick William who in 1701 became the first king of Prussia (1657-1713);
2.
Holy Roman Emperor from 1152 to 1190;
conceded supremacy to the pope;
drowned leading the Third Crusade (1123-1190);
[syn: Frederick I, Frederick Barbarossa, Barbarossa]
WordNet (r) 3.0 (2006):
Frederick I
n 1: son of Frederick William who in 1701 became the first king
of Prussia (1657-1713)
2: Holy Roman Emperor from 1152 to 1190; conceded supremacy to
the pope; drowned leading the Third Crusade (1123-1190) [syn:
Frederick I, Frederick Barbarossa, Barbarossa]