activatePronunciation: /ˈaktɪveɪt/Translate activate | into French | into German | into Italian Definition of activate verb [with object] make (something) active or operative:fumes from cooking are enough to activate the alarm convert (a substance, molecule, etc.) into a reactive form: a DNA-repair enzyme that is activated by visible light (as adjective activated)activated chlorineDerivatives activationPronunciation: /-ˈveɪʃ(ə)n/ noun activator noun activate in other Oxford dictionaries Definition of activate in the US English dictionary