Azerbaijan

1 or ancient Atropateneplay \ˌa-trō-pə-ˈtē-nē\ or Media Atropateneplay \ˈmē-dē-ə\ region of northwestern Iran; chief city Tabriz

2 independent country in western Asia and southeastern Europe bordering on the Caspian Sea and including the exclave Naxcivan, which is separated from the main part by Armenia; a constituent republic of the U.S.S.R. 1936–91; capital Baku area 33,200 square miles (86,320 square kilometers), population 9,477,100