Dictionary

A gap or opening made by breaking or battering, as in a wall, fortification or levee / embankment; the space between the parts of a solid body rent by violence

A breaking up of amicable relations, a falling-out.

A breaking of waters, as over a vessel or a coastal defence; the waters themselves

Example: A clear breach is when the waves roll over the vessel without breaking. A clean breach is when everything on deck is swept away.

A breaking out upon; an assault.

To make a breach in.

Example: They breached the outer wall, but not the main one.

To violate or break.

(of the sea) To break into a ship or into a coastal defence.

(of a whale) To leap out of the water.