circuit breaker

noun

: a switch that automatically interrupts the current of an overloaded electric circuit

Examples of circuit breaker in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
To do so, turn off the electricity and the circuit breaker box, remove the switch plate, and uninstall the light switch. Kamron Sanders, Better Homes & Gardens, 12 July 2025 County government loses $1.8 million a year to circuit breaker relief for property owners, Semler said, but that will increase in the future. Doug Ross, Chicago Tribune, 25 June 2025 The short answer is yes, to avoid any question of whether or not the power is on, the electricity should be turned off at the circuit breaker when changing a light bulb. Kait Hanson, Southern Living, 8 Mar. 2025 The math is long and complicated, but the upshot is that the property tax base will shrink, and as tax rates increase, more and more properties will qualify for the circuit breaker that caps the property’s total tax bill. Doug Ross, Chicago Tribune, 25 June 2025 See All Example Sentences for circuit breaker

Word History

First Known Use

1872, in the meaning defined above

Time Traveler
The first known use of circuit breaker was in 1872

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Cite this Entry

“Circuit breaker.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/circuit%20breaker. Accessed 6 Aug. 2025.

Kids Definition

circuit breaker

noun
: a switch that automatically stops the flow of electric current in an overloaded circuit

More from Merriam-Webster on circuit breaker

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