Thun(redirected from Thun (Berne))
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1. (Placename) a town in central Switzerland, in Bern canton on Lake Thun. Pop: 40 377 (2000)
2. (Placename) a lake in central Switzerland, formed by a widening of the Aar River. Length: about 17 km (11 miles). Width: 3 km (2 miles). German name: Thuner See
Lake of, a lake in central Switzerland, formed by a widening in the course of the Aare River. 10 mi. (16 km) long. German, Thuner See.