/ Dictionary / Index G Grand Duchy of Muscovy: Meaning and Definition of Find definitions for: Grand' Duch'y of Mus'covy Pronunciation: [key] Muscovy (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. grand duchy grand duke Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language