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closed circuit

noun, Electricity.
a circuit without interruption, providing a continuous path through which a current can flow.
Compare open circuit.
Origin of closed circuit
First recorded in 1820-30
Related forms
closed-circuit, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for closed circuit
Contemporary Examples
Historical Examples
  • This winding forms a closed circuit whether the bell is ringing or not.

    Physics Willis Eugene Tower
  • When this connection is made, the circuit is called a "closed circuit."

  • I make a distinction between a closed circuit and a closed current.

  • "It is what is known as a closed circuit calorimeter," he went on.

    The Social Gangster Arthur B. Reeve
  • "Special buses will take them to closed circuit 3-D houses," said Cam.

    Telempathy Vance Simonds
  • Circuits—A closed circuit is one in which the electricity is flowing, lighting a light, running a motor, or some other appliance.

  • Now you have a circuit—a closed circuit when the electricity runs all the way from the positive pole to the negative pole.

  • The ends of the coil were connected together so that the whole revolved as a closed circuit about the vertical axis.

    Lord Kelvin Andrew Gray
  • Back in nineteen twenty, physicists had succeeded in making a current flow for four hours in a closed circuit.

    Islands of Space John W Campbell
British Dictionary definitions for closed circuit

closed circuit

a complete electrical circuit through which current can flow when a voltage is applied Compare open circuit
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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closed circuit in Science
closed circuit  
  1. An electric circuit through which current can flow in an uninterrupted path. Compare open circuit.

  2. A television system in which the signal is usually sent by cable to a limited number of receivers.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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