Noun

1. A former communist country in eastern europe and northern asia; established in 1922; included russia and 14 other soviet socialist republics (ukraine and byelorussia and others); officially dissolved 31 december 1991
2. Formerly the largest soviet socialist republic in the ussr occupying eastern europe and northern asia
3. A former empire in eastern europe and northern asia created in the 14th century with moscow as the capital; powerful in the 17th and 18th centuries under peter the great and catherine the great when saint petersburg was the capital; overthrown by revolution in 1917
4. A federation in northeastern europe and northern asia; formerly soviet russia; since 1991 an independent state