noun
Eastern European countries
Refers collectively to the countries of Eastern Europe. Often used in geopolitical, historical, or travel contexts.
東欧諸国の中でも、ポーランドは特に経済成長が著しい。
Among Eastern European countries, Poland has seen particularly remarkable economic growth.
東欧 means Eastern Europe as a region, while 東欧諸国 explicitly refers to the countries within that region.
Compound of 東欧 (Eastern Europe) and 諸国 (various countries).