1A medieval principality in west central Russia, centred on Moscow, which formed the nucleus of modern Russia. As Muscovy expanded, princes of Muscovy became the rulers of Russia; in 1472 Ivan III, grand duke of Muscovy, completed the unification of the country, and 1547 Ivan the Terrible became the first tsar of Russia.
from obsolete French Muscovie, from modern Latin Moscovia, from Russian Moskva 'Moscow'.
Definition of Muscovy in:
- The US English dictionary