Definition of grand duchess noun from the Oxford Advanced Learner's Dictionary

     

    grand duchess

     noun
    noun
    BrE
     
    ; NAmE
     
     
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  1. 1the wife of a grand duke
  2. 2(in some parts of Europe, especially in the past) a female ruler of a small independent state
  3. 3(in Russia in the past) a daughter of the tsar