Eastern Europe is a subregion of the European continent. As a largely ambiguous term, it has a wide range of geopolitical, geographical, ethnic, cultural and socio-economic connotations. Its eastern boundary is marked by the Ural Mountains, and its western boundary is defined in various ways.[1] Narrow definitions, in which Central and Southeast Europe are counted as separate regions, include Belarus, Russia and Ukraine.[2] In contrast, broader definitions include Moldova and Romania, but also some or all of the Balkans, the Baltic states, the Caucasus, and the Visegrád group.

https://en.wikipedia.org/wiki/Eastern_Europe