noun
Union of Soviet Socialist Republics; USSR; Soviet Union
Historical term for the former Soviet Union; used in formal or historical contexts.
ソビエト社会主義共和国連邦は1991年に崩壊した。
The Union of Soviet Socialist Republics collapsed in 1991.
Common abbreviation for the Soviet Union; more frequently used in everyday contexts than the full official name.
Transliteration of the Russian 'Советский Союз' (Sovetskiy Soyuz) combined with Japanese translations for 'socialist republics union'.