Solothurn
geographical name
So·lo·thurn ˈzō-lə-ˌtu̇rn 
ˈsō-
1
canton of northwestern Switzerland area 305 square miles (790 square kilometers), population 255,000
2
commune on the Aare River in northwestern Switzerland population 12,500
Note: The commune of Solothurn serves as capital of the canton of Solothurn.