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Meaning of “master switch” in the English Dictionary

"master switch" in British English

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master switchnoun [C]

uk   /ˈmɑː.stə ˌswɪtʃ/ us   /ˈmæs.tɚ ˌswɪtʃ/
a switch that can be used to turn on or off power to all the lights or machines in a building
(Definition of master switch from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
Translations of “master switch”
in Chinese (Simplified) 主控开关,总开关…
in Chinese (Traditional) 主控開關,總開關…
What is the pronunciation of master switch?
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