Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “circuit breaker”

See all translations

circuit breaker

noun [C]
 
 
a piece of equipment that stops the flow of an electric current, used to prevent damage to the wires and equipment that are connected to it: If your internet access is out, it could be that a circuit breaker was tripped during a storm.
STOCK MARKET a rule that temporarily stops trade on a stock market or closes it when prices go down to a particular level too quickly: The New York Stock Exchange instituted circuit breakers to reduce volatility and promote investor confidence. There are three circuit-breaker thresholds—10%, 20%, and 30%— calculated at the beginning of each quarter.
Translations of “circuit breaker”
in Chinese (Traditional) (電流)斷路器…
in Chinese (Simplified) (电流)断路器…
(Definition of circuit breaker from the Cambridge Business English Dictionary © Cambridge University Press)
What is the pronunciation of circuit breaker?
Add Cambridge dictionaries to your browser to your website

Definitions of “circuit breaker” in other dictionaries

Word of the Day

christmassy

typical of Christmas, or happy because it is Christmas

Word of the Day

Cleavage proves divisive in Cambridge’s words of 2014

by Alastair Horne,
December 19, 2014
​​​​ Other dictionaries may choose faddish novelties as their words of the year, but here at Cambridge, we like to do something different. We look for the words that have seen sudden surges in searches over the course of the year – words that have been baffling users of English and driven them

Read More 

tweleb noun

December 22, 2014
informal a Twitter celebrity; (more specifically, someone who has more than 1,000 followers on Twitter) There were a few old and a few new faces, including a tweleb or two. Expect to see and hear more from these cool kids.

Read More