What is the meaning of Breaker?

Something that breaks (something else).

A machine for breaking rocks, or for breaking coal at the mines.

The building in which such a machine is placed.

A person or company that specializes in breaking things; their yard.

Ellipsis of shipbreaker; a shipbreaking company or its yard.

Ellipsis of car breaker; a car breaking company or its yard.

Ellipsis of horsebreaker.

A wave breaking into foam against the shore, or against a sandbank, or a rock or reef near the surface, considered a useful warning to ships of an underwater hazard

A breakdancer.

A user of CB radio.

Ellipsis of circuit breaker.

Used to open a conversation or call for a response on CB radio.

A small cask of liquid kept permanently in a ship’s boat in case of shipwreck.

circuit breaker

to break (win a game when receiving)

breaker; circuit breaker

Source: wiktionary.org