An island in the eastern Aleutian Islands of Alaska, on which the naval base of Dutch Harbor and the city of Unalaska (population 3,532; est. 2008) are the chief settlements.
Definition of Unalaska in US English:
Unalaska
proper nounˌənəˈlaskə
An island in the eastern Aleutian Islands of Alaska, on which the naval base of Dutch Harbor and the city of Unalaska (population 3,532; est. 2008) are the chief settlements.