1 an act of breaking or failing to observe a law, agreement, or code of conduct: a breach of confidence | I sued for breach of contract.
• a break in relations: a sudden breach between father and son.
2 a gap in a wall, barrier, or defense, esp. one made by an attacking army.
verb [ with obj. ]
1 make a gap in and break through (a wall, barrier, or defense): the river breached its bank.
• break or fail to observe (a law, agreement, or code of conduct).
2 [ no obj. ] (of a whale) rise and break through the surface of the water.