Pronunciation: (tOOn), [key]
1. a city in central Switzerland, on the Aar River, near the Lake of Thun. 36,765.
2. Lake of. German, Thuner See. a lake in central Switzerland, formed by a widening in the course of the Aar River. 10 mi. (16 km) long.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.