noun
former Soviet bloc countries
Refers collectively to the countries that were part of or aligned with the Soviet Union before its dissolution.
旧ソ連圏諸国では、今でもロシア語が広く通じる。
In the former Soviet bloc countries, Russian is still widely understood.
Compound of 旧 (former), ソ連 (Soviet Union), 圏 (sphere/area), and 諸国 (various countries).