electrolyze Syllabification: (e·lec·tro·lyze)Pronunciation: /iˈlektrəˌlīz/Definition of electrolyze verb [with object] subject to or treat by electrolysis:when you electrolyze water, it splits into hydrogen and oxygenDerivatives electrolyzer noun Origin: mid 19th century: from electrolysis, on the pattern of analyzeelectrolyze in other Oxford dictionaries Definition of electrolyze in the British & World English dictionary