- a sea between Europe and Asia, bordered by Turkey, Romania, Bulgaria, Ukraine, Georgia, and the Russian Federation. 164,000 sq. mi. (424,760 sq. km).
- an inland sea between SE Europe and Asia: connected to the Aegean Sea by the Bosporus, the Sea of Marmara, and the Dardanelles, and to the Sea of Azov by the Kerch Strait. Area: about 415 000 sq km (160 000 sq miles)
