a failure to perform some promised act or obligation
"The company faced legal trouble after their breach of contract left several clients without the agreed-upon services."
an opening (especially a gap in a dike or fortification)
"The heavy rain caused a sudden breach in the sea wall, allowing waves to crash onto the dry land."
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
"The storm finally caused a massive breach in the sea wall, allowing floodwaters to rush into the village."
act in disregard of laws, rules, contracts, or promises
"offend all laws of humanity"
"violate the basic laws or human civilization"
"break a law"
"break a promise"
To make a breach in.
"The strong wind managed to breach the old wooden fence, creating a gap that let the storm surge into the yard."
A particular security exploit against HTTPS when using HTTP compression, based on the CRIME exploit.
"The system administrators patched a critical vulnerability known as BREACH to prevent attackers from stealing session cookies through compressed HTTPS traffic."