national capital - the capital city of a nation

Grand Duchy of Luxembourg, Luxembourg, Luxemburg - a grand duchy (a constitutional monarchy) landlocked in northwestern Europe between France and Belgium and Germany; an international financial center

Common Market, EC, EEC, European Community, European Economic Community, European Union, EU, Europe - an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members; "he took Britain into Europe"

NATO, North Atlantic Treaty Organization - an international organization created in 1949 by the North Atlantic Treaty for purposes of collective security

Benelux - a customs union comprising BElgium and NEtherlands and LUXembourg

European country, European nation - countries occupying the European continent

capital of Luxembourg, Luxembourg, Luxembourg City, Luxembourg-Ville, Luxemburg - the capital and largest city of Luxembourg

Europe - the 2nd smallest continent (actually a vast peninsula of Eurasia); the British use `Europe' to refer to all of the continent except the British Isles

Luxembourger, Luxemburger - a native or inhabitant of Luxembourg