<p><strong>Noun</strong></p><ul><li>Also Azerbaijan.</li><li>Formerly Azerbaijan Soviet Socialist Republic.</li><li>a republic in Transcaucasia, N of Iran and W of the Caspian Sea. 33,430 sq. mi. (86,600 sq. km): Baku.</li><li>a region of NW Iran, divided into two provinces in 1938: East Azerbaijan (Tabriz) and West Azerbaijan (Orumiyeh).</li></ul>