DagestanPronunciation: /ˌdagɪˈstɑːn, -ˈstan/Definition of Dagestan an autonomous republic in SW Russia, on the western shore of the Caspian Sea; population 2,707,900 (est. 2009); capital, Makhachkala. Derivatives Dagestani noun & adjective Dagestanian noun & adjective Dagestan in other Oxford dictionaries Definition of Dagestan in the US English dictionary