/looh serrn"/ ; Fr. /lyuu serddn"/ , n.
1. a canton in central Switzerland. 291,700; 576 sq. mi. (1490 sq. km).
2. the capital of this canton, on Lake of Lucerne. 65,300.
3. Lake of . Also called Lake of the Four Forest Cantons . a lake in central Switzerland. 24 mi. (39 km) long; 44 sq. mi. (114 sq. km). German, Luzern .