Breach definition (noun), (verb)
A breach is the result of a violation of the law, duty, or a contract without proper justification. It occurs when a person fails to fulfill the obligations of a contract or agreement (breach of contract), fails to perform their duties (breach of duty), disturbs public peace, or refuses to honor a promise.
To breach means to break or violate an obligation. It’s the act of failing to perform an agreement, breaking a promise, actively violating a duty, or offending someone’s rights.