Serbia and Montenegro /ˈsɜː(ɹ)biə ən(d)ˌmɒntəˈnɛɡɹəʊ/ noun1 •(historical) A former country in Southeastern Europe on the Balkan Peninsula, existing from 1992 to 2006, previously part of Yugoslavia; composed of modern Serbia and Montenegro and known until 2003 as the Federal Republic of Yugoslavia.