Siberia

geographical name

Si·​be·​ria sī-ˈbir-ē-ə 

vast region of northern Asia chiefly in Russia extending from the Ural Mountains to the Pacific Ocean and from the Arctic Ocean into northern Kazakhstan and to the borders of China and Mongolia; roughly coextensive with Russia in Asia

Siberian

sī-ˈbir-ē-ən 

adjective or noun