Pronunciation: (luk'sum-bûrg"; Fr. lyk-sän-bOOr'),[key] —n. 1. a grand duchy surrounded by Germany, France, and Belgium. 377,100; 999 sq. mi. (2585 sq. km).
2. a city in and the capital of this grand duchy. 78,400.
3. a province in SE Belgium: formerly a part of the grand duchy of Luxembourg. 219,642; 1706 sq. mi. (4420 sq. km). Cap.: Arlon. Also,Luxemburg(for defs. 1, 2).