- the wife or widow of a grand duke
- a woman who has the rank of a grand duke and rules a grand duchy
- in czarist Russia, a royal princess
See grand duchess in American Heritage Dictionary 4
- The wife or widow of a grand duke.
- A woman who is the sovereign of a grand duchy.
- The daughter or granddaughter of a czar in the male line.
- Used as the title for such a noblewoman.