Aegean, e je'an, Sea, that part of the Mediterranean which washes the eastern shores of Greece, the southern coast of Turkey and the western coast of Asia Minor. Its length is about 400 miles and its breadth 175 miles at the widest point. It contains numerous islands, many of which are of volcanic origin. The chief ones are Euboea, Chios, Lesbos, Lemnos and Samos.