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English definition of “power up (something)”

power up (something)

verb [T] phrasal verb with power  /ˈpɑʊ·ər/ us  
to provide something with energy so that it can begin to operate: The phone sits in the stand to power up. Warm water acts as fuel for a hurricane's engine, powering it up.
(Definition of power up (something) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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