Ashgabad a city in southwest Turkmenistan, the country's capital and largest city, formerly called Ashkhabad. formerly Ashkhabad City (pop., 1999 est.: 605,000), capital of Turkmenistan. It lies in an oasis at the northern foot of the Kopet-Dag Range near the Iranian border. Founded in 1881 as a Russian military fort, it was the capital of Turkmenistan S.S.R. (1924-90). A violent earthquake destroyed the city in 1948; it was rebuilt on the same plan. It is now an industrial, transportation, and cultural centre