Donostia-San Sebastián
geographical name
Do·nos·tia-San Se·bas·tián
| \ ˌdō-nō-ˈstē-ə-ˌsän-ˌsā-bäs-ˈtyän
\
\
Definition of Donostia-San Sebastián
seaport on the Bay of Biscay in northern Spain; capital of Guipúzcoa province population 185,512