- a peninsula comprising the continental portion of Denmark: naval battle between the British and German fleets was fought west of this peninsula 1916. 11,441 sq. mi. (29,630 sq. km).
- a peninsula of N Europe: forms the continental portion of Denmark and geographically includes the N part of the German province of Schleswig-Holstein, while politically it includes only the mainland of Denmark and the islands north of Limfjorden; a major but inconclusive naval battle was fought off its NW coast in 1916 between the British and German fleetsDanish name: Jylland