plural of Autonomous Soviet Socialist Republic

Abbreviation of Union of Soviet Socialist Republics.

(rare) Abbreviation of Union of Soviet Socialist Republics.

(historical, Soviet Union) A short-lived republic within the Caucasus region of the Soviet Union that covered the territory of Abkhazia, and existed from 31 March 1921 to 19 February 1931.

The official name for modern-day Russia under the Communist Party from 1936 to 1991 (from 1918 to 1937, according to the Constitution of the RSFSR, called the Russian Socialist Federative Soviet Republic). Part of the USSR from 1922 to 1991.

(historical) an autonomous republic of the Soviet Union within the Georgian SSR