Serbia and Montenegro

from The American Heritage® Dictionary of the English Language, 5th Edition.

• A former country of southeastern Europe consisting of Serbia and Montenegro, the last two remaining constituent states after Bosnia and Herzegovina, Croatia, Macedonia, and Slovenia seceded from Yugoslavia in 1991. The name Yugoslavia was officially abandoned in 2003, and Serbia and Montenegro split into two independent republics in 2006.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• proper noun historical Former country on the Balkan Peninsula, formerly part of Yugoslavia. It ceased to exist when Montenegro declared independence from Serbia on June 3, 2006. Official name: Serbia and Montenegro.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a mountainous republic in southeastern Europe bordering on the Adriatic Sea; formed from two of the six republics that made up Yugoslavia until 1992; Serbia and Montenegro were known as the Federal Republic of Yugoslavia until 2003 when they adopted the name of the Union of Serbia and Montenegro