breaker

¹ American  

[brey-ker] / ˈbreɪ kər /

noun

1. a person or thing that breaks.

2. a wave that breaks or dashes into foam.

3. Citizens Band Radio Slang. a person who indicates a wish to transmit a message, as by breaking in on a channel.

4. Also called breaker strip.  Automotive. a strip of fabric under the tread of a pneumatic tire casing, designed to protect the carcass.

5. Textiles.

   1. brake.

   2. a machine that separates the fiber from foreign matter in preparation for the carding process.

6. Also called prairie breaker.  a plow with a long, low moldboard for turning virgin land.

7. Electricity. circuit breaker.

8. Mining.

   1. a building where coal delivered from a mine is broken up and sorted.

   2. a machine that reduces large lumps of coal or ore to a size that can be accommodated by a conveyor belt.

9. a break dancer.

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interjection

1. Citizens Band Radio Slang. (used to announce that a person is about to transmit a message or question on a channel, especially one already in use.)

breaker ² American  

[brey-ker] / ˈbreɪ kər /

noun

Nautical.

1. a small water cask for use in a boat.

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breaker ¹ British  

/ ˈbreɪkə /

noun

1. a person or thing that breaks something, such as a person or firm that breaks up old cars, etc

2. a large wave with a white crest on the open sea or one that breaks into foam on the shore

3. electronics short for circuit breaker

4. a machine or plant for crushing rocks or coal

5. Also called: breaking plough.  a plough with a long shallow mouldboard for turning virgin land or sod land

6. textiles a machine for extracting fibre preparatory to carding

7. an operator on citizens' band radio

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breaker ² British  

/ ˈbreɪkə /

noun

1. a small water cask for use in a boat

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breaker Scientific  

/ brā′kər /

1. A wave that crests or breaks into foam, as against a shoreline.

2. A circuit breaker.

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Synonym Usage

See wave.

Etymology

Origin of breaker¹

First recorded in 1125–75; break + -er ¹ ( def. )

Origin of breaker²

First recorded in 1825–35; said to be alteration of Spanish bareca, variant of barrica “small keg”

Example Sentences

In an address at the People's History Museum in Manchester, the new MP for nearby Makerfield will say as prime minister he would "give Britain the circuit breaker it needs".

From BBC • Jun. 28, 2026

The tax collector is expecting more than 20.7 million extension requests this year, which would be a record breaker.

From MarketWatch • Apr. 14, 2026

Both phones have the same 6.1-inch screen, but no MagSafe on the 16e was a deal breaker for me.

From The Wall Street Journal • Mar. 2, 2026

Khachanov then raced into a 6-1 lead in the breaker before finally converting set-point at the third time of asking.

From Barron's • Feb. 19, 2026

Working alone, each was a top-notch code breaker.

From "The Woman All Spies Fear" by Amy Butler Greenfield