Definition of activate verb from the Oxford Advanced American Dictionary

 

activate

 verb
verb
NAmE//ˈæktəˌveɪt//
 
activate somethingVerb Forms present simple I / you / we / they activate
 
he / she / it activates
 
past simple activated
 
-ing form activating
 
 
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to make something such as a device or chemical process start working The burglar alarm is activated by movement. The gene is activated by a specific protein.
NAmE//ˌæktəˈveɪʃn//
 
noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: activate