Definitions of breach
to break or violate a law, obligation, duty or contract term etc
Durham Tees Valley argued that the airline breached a contract, signed in April 2003, which obliged it to fly two of its planes out of the airport for a minimum of 10 years.
to make a gap in and then break through a wall, barrier, or other defence
US Marines and Arab forces breached the Iraqi defences at several points on the Kuwait-Saudi-Arabian border.