Definition of Danube in English:
Danube
proper nounˈdanjuːbˈdænjub
A river which rises in the Black Forest in south-western Germany and flows about 2,850 km (1,770 miles) into the Black Sea. It is the second-longest river in Europe after the Volga; the cities of Vienna, Budapest, and Belgrade are situated on it.
German name Donau
Definition of Danube in US English:
Danube
proper nounˈdænjubˈdanyo͞ob
A river that rises in the Black Forest in southwestern Germany and flows for about 1,770 miles (2,850 km) into the Black Sea. It is the second longest river in Europe (after the Volga); the cities of Vienna, Budapest, and Belgrade are situated on its banks.
German name Donau