1922년부터 1991년까지 유라시아 대륙에 존재했던 여러 사회주의 공화국들의 연합 국가.
A former socialist state in Eurasia that existed from 1922 to 1991, consisting of a union of multiple national republics with its capital in Moscow.
예문:
"The collapse of the USSR in 1991 led to the independence of fifteen separate countries."
"During the Cold War, the USSR was the primary ideological rival of the United States."
"The USSR launched the first artificial satellite, Sputnik 1, into orbit in 1957."