The river Drava or Drau.
Drava definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
river in SC Europe, flowing from the Alps of Austria southeastward through Slovenia & Croatia into the Danube: c. 450 mi (724 km)
Drava definition by American Heritage Dictionary
or Dra·ve also Drau
A river rising in the Carnic Alps of southern Austria and flowing about 724 km (450 mi) eastward through northeast Slovenia and northern Croatia to the Danube River.