the territory, state, or principality of a grand duke or grand duchess
grand duchy in American English
the territory or a country ruled by a grand duke or a grand duchess
grand duchy in American English
noun
a territory ruled by a grand duke or grand duchess
Word origin
[1825–35]This word is first recorded in the period 1825–35. Other words that entered Englishat around the same time include: archaic, breakdown, electrolyte, individualism, structural