Possible Definitions:
1. Breaker (n.) One who, or that which, breaks.
2. Breaker (n.) Specifically: A machine for breaking rocks, or for breaking coal at the mines; also, the building in which such a machine is placed.
3. Breaker (n.) A small water cask.
4. Breaker (n.) A wave breaking into foam against the shore, or against a sand bank, or a rock or reef near the surface.