PrutPronunciation: /pruːt/ (also Pruth)Definition of Prut a river of SE Europe, which rises in the Carpathian Mountains in southern Ukraine and flows south-east for 850 km (530 miles), joining the Danube near Galaţi in Romania. For much of its course it forms the border between Romania and Moldova. Prut in other Oxford dictionaries Definition of Prut in the US English dictionary