hydrogenatePronunciation: /hʌɪˈdrɒdʒəneɪt, ˈhʌɪdrədʒəneɪt/Definition of hydrogenate verb [with object] (often as adjective hydrogenated) charge with or cause to combine with hydrogen: a process that changes a liquid oil into a solid or hydrogenated fatDerivatives hydrogenationPronunciation: /-ˈneɪʃ(ə)n/ noun hydrogenate in other Oxford dictionaries Definition of hydrogenate in the US English dictionary