Soviet Union
geographical name
variants:
or U.S.S.R.
or USSR
or officially Union of Soviet Socialist Republics
Definition of Soviet Union
former country 1922–91 in eastern Europe and northern Asia bordering on the Arctic and Pacific oceans and Baltic and Black seas; capital Moscow area 8,649,512 square miles (22,402,236 square kilometers)
Note: The Soviet Union, a union of constituent republics (Armenia, Azerbaijan, Belorussia, Estonia, Georgia, Kazakhstan, Kyrgyzstan, Latvia, Lithuania, Moldavia, Russia, Tajikistan, Turkmenistan, Ukraine, and Uzbekistan), existed from 1922 to 1991 and during that time was the largest country in the world in terms of land area.
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Merriam-Webster unabridged
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