hydrolysisPronunciation: /hʌɪˈdrɒlɪsɪs/Translate hydrolysis | into Italian Definition of hydrolysis noun [mass noun] Chemistry the chemical breakdown of a compound due to reaction with water. Derivatives hydrolyticPronunciation: /ˌhʌɪdrəˈlɪtɪk/ adjective hydrolysis in other Oxford dictionaries Definition of hydrolysis in the US English dictionary