noun.
A daughter or granddaughter of the Emperor of Austria-Hungary, or the wife of a son or grandson of the Emperor of Austria-Hungary
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a wife or widow of an archduke or a princess of the former ruling house of Austria
Word Usage
"The archduchess will be a precious guaranty to Napoleon, for he will feel convinced that the emperor will be unwilling to sacrifice his child, and this conviction will fill him with confidence and a feeling of security."