activation
US /ˌæk.təˈveɪ.ʃən/
UK /ˌæk.təˈveɪ.ʃən/
1.
the action or process of making something active or operative
:
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The activation of the alarm system prevented the burglary.
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User activation is required to access premium features.
2.
the process of making a substance or device reactive or effective
:
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Enzyme activation is crucial for metabolic processes.
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The drug's activation occurs in the liver.