Definition of deactivate verb from the Oxford Advanced American Dictionary

 

deactivate

 verb
verb
NAmE//ˌdiˈæktəˌveɪt//
 
deactivate somethingVerb Forms present simple I / you / we / they deactivate
 
he / she / it deactivates
 
past simple deactivated
 
-ing form deactivating
 
 
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to make something such as a device or chemical process stop working Do you know how to deactivate the alarm?
See the Oxford Advanced Learner's Dictionary entry: deactivate