Dortmund[dôrt′mənd; Ger dō̂rt′mo̵ont]
city in W Germany, in the valley of the Ruhr River in the state of North Rhine-Westphalia: pop. 602,000
A city of west-central Germany north-northeast of Cologne. First mentioned c. 885, it flourished from the 13th to the 17th century as a member of the Hanseatic League.