circuit breaker: meaning, definition, pronunciation and examples
B2Technical, Formal, Business, Figurative
Quick answer
What does “circuit breaker” mean?
A safety device that automatically stops the flow of electricity in a circuit when it becomes overloaded or faulty.
Audio
Pronunciation
Definition
Meaning and Definition
A safety device that automatically stops the flow of electricity in a circuit when it becomes overloaded or faulty.
Any mechanism or intervention designed to temporarily halt a process in order to prevent escalation, damage, or collapse, such as in financial markets, legal proceedings, or contagion scenarios.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning. In very specific UK domestic contexts, 'fuse' or 'fuse box' may be used more informally where US English would use 'circuit breaker'/'breaker box'. The metaphorical extension is equally common in both varieties.
Connotations
Identical connotations of safety, automatic response, and prevention of systemic failure.
Frequency
Slightly more frequent in American English for the domestic electrical device due to prevalence of circuit breaker panels over fuse boxes in US homes.
Grammar
How to Use “circuit breaker” in a Sentence
The [NOUN] circuit breaker [VERBed] (e.g., tripped, failed)Implement a [ADJECTIVE] circuit breaker to [VERB][VERB] (e.g., Activate, Reset) the circuit breakerVocabulary
Collocations
Examples
Examples of “circuit breaker” in a Sentence
verb
British English
- The system is designed to circuit-break during extreme volatility.
- The new regulation will effectively circuit-break the chain of infection.
American English
- The software update will circuit-break runaway processes.
- They proposed a law to circuit-break eviction proceedings during the crisis.
adverb
British English
- The system reacted circuit-breaker fast.
American English
- The market fell circuit-breaker quick, triggering a halt.
adjective
British English
- They discussed circuit-breaker lockdown measures.
- A circuit-breaker provision was included in the contract.
American English
- The senator proposed a circuit-breaker tax on speculation.
- The team implemented a circuit-breaker protocol for server failures.
Usage
Meaning in Context
Business
Refers to a pre-agreed trading halt in stock markets to curb panic selling, e.g., 'The exchange activated a 15-minute circuit breaker.'
Academic
Used in papers on electrical engineering, economics, and complex systems theory to describe fail-safe mechanisms.
Everyday
Primarily refers to the device in the home's electrical panel, e.g., 'The hairdryer tripped the circuit breaker.'
Technical
Specific device specifications (e.g., '20-amp double-pole circuit breaker'), or analogous systems in software (e.g., a microservices pattern) and epidemiology (e.g., a lockdown as a circuit breaker).
Vocabulary
Synonyms of “circuit breaker”
Vocabulary
Antonyms of “circuit breaker”
Watch out
Common Mistakes When Using “circuit breaker”
- Confusing 'circuit breaker' (resettable) with a 'fuse' (needs replacement). Using 'circuit breaker' as a verb (non-standard; 'trip' or 'trigger' is used). Incorrect plural: 'circuits breaker' instead of 'circuit breakers'.
FAQ
Frequently Asked Questions
A fuse is a one-time-use device containing a wire that melts when overloaded, requiring replacement. A circuit breaker is a resettable switch that trips (opens) mechanically during an overload and can be manually switched back on.
While increasingly used in business and tech jargon (e.g., 'to circuit-break a process'), it is not standard in formal writing. Prefer phrases like 'trigger a circuit breaker', 'halt', or 'pause'.
It's a metaphor borrowed from electrical engineering. Just as an electrical circuit breaker prevents a fire by stopping an overload, a trading circuit breaker is designed to prevent a market crash by pausing trading during extreme drops, allowing time for information dissemination and panic to subside.
Yes, it is a closed compound noun (written as two words, not hyphenated). The first noun ('circuit') modifies the second ('breaker'), specifying the type of breaker.
A safety device that automatically stops the flow of electricity in a circuit when it becomes overloaded or faulty.
Circuit breaker is usually technical, formal, business, figurative in register.
Circuit breaker: in British English it is pronounced /ˈsɜːkɪt ˌbreɪkə(r)/, and in American English it is pronounced /ˈsɜːrkɪt ˌbreɪkər/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Throw a breaker”
- “Trip the breaker (often literal, but can be metaphorical)”
Learning
Memory Aids
Mnemonic
Imagine an Olympic runner (current) on a circuit track. A breaker (like a hurdle) automatically pops up to STOP the runner if they start running dangerously fast (overload). This prevents the track (circuit) from burning.
Conceptual Metaphor
SYSTEMIC SAFETY IS AN ELECTRICAL CIRCUIT BREAKER; A PROCESS IS A FLOW OF ELECTRICITY; DANGER/CRISIS IS AN OVERLOAD.
Practice
Quiz
In a financial context, what is the primary function of a 'circuit breaker'?