Definition of Russia
1 or formerly Muscovy play \ˈməs-kə-vē\ former empire E Europe & N Asia coextensive (except for Finland & Kars, a mountainous region now in NE Turkey) with the Union of Soviet Socialist Republics ∗ St. Petersburg
2 the Union of Soviet Socialist Republics —a popular usage despite the fact that the Union of Soviet Socialist Republics included other republics besides Russia
3 or officially Russian Federation independent country in E Europe & N Asia bordering on Arctic & Pacific oceans & on Baltic & Black seas; a constituent republic (Russian Republic or Soviet Russia ) of the Union of Soviet Socialist Republics 1922–91 ∗ Moscow area 6,592,812 square miles (17,075,383 square kilometers), pop 148,000,000
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