hydroelectricPronunciation: /hʌɪdrəʊɪˈlɛktrɪk/Translate hydroelectric | into German | into Italian | into Spanish Definition of hydroelectric adjective relating to or denoting the generation of electricity using flowing water (typically from a reservoir held behind a dam or barrage) to drive a turbine which powers a generator: economic and environmental aspect of the hydroelectric schemeDerivatives hydroelectricityPronunciation: /-ˈtrɪsɪti/ noun hydroelectric in other Oxford dictionaries Definition of hydroelectric in the US English dictionary