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English definition of “deactivate”

deactivate

verb [T] uk   /ˌdiˈæk.tɪ.veɪt/ us  
to cause something to be no longer active or effective: All chemical weapons facilities will be deactivated.Not functioning
deactivation
noun [U] uk   /ˌdiː.æk.tɪˈveɪ.ʃən/ us    /diˌæk-/
FunctioningPerforming a function
(Definition of deactivate from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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