- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for closed circuit
Closed-circuit videos show a suspect who is white, 35 to 45 years old, and has salt-and-pepper hair.The Mad Gunman of Paris
November 19, 2013
There were no closed-circuit television cameras operating in the area near the blast.Terror Strikes India
September 7, 2011
Closed-circuit footage from a nearby shop shows at least three other security personnel simply standing by.Punjab Governor Salmaan Taseer: Mourning Pakistan's Slain Leader
January 4, 2011
Is writing simply a borderless act or can we ascribe a closed-circuit origin to it?Do National Writers Still Exist?
November 28, 2010
This is a highly efficient form of closed-circuit magnet, since the magnetic circuit is of low reluctance.Cyclopedia of Telephony & Telegraphy Vol. 1
I'll probably stick to electric-eye doors, burglar alarms, closed-circuit television systems and things like that.Creatures of the Abyss
An ordinary telegraph relay may be used in connection with the closed-circuit alarm.
The alarm switches are all connected in series in this case and in circuit with a closed-circuit battery and relay or drop.
This cell is used for telegraph lines and for other closed-circuit work.How Two Boys Made Their Own Electrical Apparatus
Thomas M. (Thomas Matthew) St. John
- a complete electrical circuit through which current can flow when a voltage is appliedCompare 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
- An electric circuit through which current can flow in an uninterrupted path. Compare open circuit.
- A television system in which the signal is usually sent by cable to a limited number of receivers.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.