English version

master switch

From Longman Dictionary of Contemporary English
Related topics: Electricity
master switchˈmaster ˌswitch noun [countable] 🔊 🔊 TPEthe switch that controls the supply of electricity to the whole of a building or area
Examples from the Corpus
master switchThe lights were obviously controlled from some master switch for they went on without a sound.The phones were dead until Leese flipped the master switch.
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