A breach is a violation of a law, duty, or promise. If you'd contracted to mow your neighbor's lawn and don't do it, he can sue you for breach of contract.
noun · the act or a result of breaking; a break or rupture: · an infraction or violation, such as of a law, contract, trust, or promise: · a gap made in a wall, ...
a failure to do something that must be done by law. Extra Examples He was sued for breach of contract. The court's decision is a breach of the European ...
1. as in violation. a failure to uphold the requirements of law, duty, or obligation ; 2. as in offence. a breaking of a moral or legal code ; 3. as in gap. an ...
breach verb [T] (BREAK PROMISE/RULE). to break a law, promise, agreement, or relationship: They breached the agreement they had made with their employer.