The Russian Empire; the tsarist empire in Russia lasting from 1721 to 1917.
The Union of Soviet Socialist Republics (a very common name, although more formally Russia, the RSFSR, was one of several constituent republics of the USSR).
A country in Eastern Europe and North Asia, bordering on the Pacific and Arctic Oceans and the Baltic, Black, and Caspian Seas; established as an independent country in 1991 upon the dissolution of the Soviet Union, it is the largest country in the world. Co-official name: Russian Federation, formerly the Russian Soviet Federative Socialist Republic (RSFSR) (among other names) from 1917 to 1991. Capital and largest city: Moscow.
Rus, an East Slavic medieval state (880–12th c), corresponding to what is now Ukraine and Belarus, as well as western Russia.
Western portions of East Slavic lands, including the principalities of Galicia-Volhynia and Kyiv, which united with Lithuania and Poland (14th c–1772), corresponding to what is now Ukraine and Belarus.
Lands inhabited by Ukrainians (Ruthenians) of the former Austrian Empire kingdom of Galicia (1772–1918), corresponding to parts of Western Ukraine.
The territory between Central and Eastern Europe inhabited by Rusyns, on the slopes of the Carpathian Mountains in parts of Ukraine, Poland and Slovakia.