A city in western Germany, the capital of the state of Hesse, situated on the River Rhine opposite Mainz; population 275,600 (est. 2006). It has been a popular spa town since Roman times.
Definition of Wiesbaden in US English:
Wiesbaden
proper nounˈvēsˌbäd(ə)n
A city in western Germany, the capital of the state of Hesse, on the Rhine River, opposite Mainz; population 275,600 (est. 2006).