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master switch


a controlling switch over the actions within an entire electrical or fuel system, esp. one that can break the main supply in emergency situations's 21st Century Lexicon
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Examples from the Web for master switch
Historical Examples
  • This can be obviated by a master switch controlling the top floor, which can be in charge of one of the head servants.

    The Labour-saving House Dorothy Constance Bayliff Peel
  • He threw the master switch and a roaring burst of power poured into the main tubes.

    The Revolt on Venus Carey Rockwell
  • He closed the master switch and turned to look at the smiling faces of Mr. and Mrs. Hill.

    The Revolt on Venus Carey Rockwell
  • He made two delicate adjustments, threw a master switch and swung around.

    Breaking Point James E. Gunn
  • Admittedly feeling better, Tom turned to the master switch and found it missing.

    The Revolt on Venus Carey Rockwell
  • A man was on duty at a master switch—he would flood the camp with light at the rifle's first crack.

    Two Thousand Miles Below Charles Willard Diffin
  • Tom watched the pressure needle rise slowly in front of him and finally reached out and gripped the master switch.

    Danger in Deep Space Carey Rockwell
  • Seconds later the giant shock absorbers crunched on the ramp and Tom closed the master switch cutting all power.

    The Revolt on Venus Carey Rockwell
  • Then, checking the Polaris and cutting all power, Connel removed the master switch and hid it.

    The Revolt on Venus Carey Rockwell
  • One of the policemen took Verkan Vall's place at the control desk and threw the master switch, after checking the instruments.

    Temple Trouble Henry Beam Piper

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