sea between European & Asiatic Turkey, connected with the Black Sea by the Bosporus & with the Aegean by the Dardanelles: c. 4,300 sq mi (11,137 sq km)
See Marmara in American Heritage Dictionary 4
A sea of northwest Turkey between Europe and Asia. It is connected to the Black Sea through the Bosporus and to the Aegean Sea through the Dardanelles.