東とう欧おう諸しょ国こくとうおうしょこくMeanings1nounEastern European countriesRefers collectively to the countries of Eastern Europe. Often used in geopolitical, historical, or travel contexts.東とう欧おう諸しょ国こくの中なかでも、ポーランドは特とくに経けい済ざい成せい長ちょうが