breachbreach1 /briːtʃ/ noun1[countableC, uncountableU]LAW an action that breaks an agreement, rule, law etcThe company wrote a letter of apology to the Israeli government, saying that any breach of the rules was unintentional.
They were in breach of London stock exchange regulations.
→ anticipatory breach2[countableC] a serious disagreement between peoplea new and serious breach between the US and Germany