Sevastopol[sə vas′tə pōl′; Russ se′väs tō̂′pəl y']
seaport in SW Crimea, on the Black Sea: pop. 366,000
A city of southern Ukraine in the Crimea on the Black Sea west of Yalta. Founded on the site of an ancient Greek colony, it became Russia's principal Black Sea naval base after the late 18th century. The city resisted lengthy sieges during the Crimean War and World War II.