soviet union

Noun (1)

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 1991Synonyms: RussiaUnion of Soviet Socialist RepublicsUSSRInstance of country, statePart of EurasiaParts Russian Soviet Federative Socialist Republic, Soviet Socialist Republic, Caspian