a republic in S central Europe, bordering on the Adriatic; declared a kingdom in 1910 and united with Serbia, Croatia, and other territories in 1918 to form Yugoslavia; remained united with Serbia as the Federal Republic of Yugoslavia when the other Yugoslav constituent republics became independent in 1991–92; Union of Serbia and Montenegro formed in 2003 and dissolved 2006. Mainly mountainous. Language: Serbian (Montenegrin). Religion: Orthodox Christian majority, Muslim minority. Currency: euro. Capital: Podgorica. Pop: 628 960 (2017 est). Area: 13 812 sq km (5387 sq miles)