| Noun | 1. | Grand Duchy of Luxembourg - a grand duchy (a constitutional monarchy) landlocked in northwestern Europe between France and Belgium and Germany; an international financial centerBenelux - a customs union comprising BElgium and NEtherlands and 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 | |