Breaker definition of breaker by The Free Dictionary
Define breaker. breaker synonyms, breaker pronunciation, breaker translation, English dictionary definition of breaker. n. 1. One that breaks, as a machine for breaking up or crushing a substance, such as rock, coal, or plant fibers. 2. A circuit breaker. noun wave, roller, comber, billow, white horse, whitecap breakers on the sea wall.