n. 1 break, violation, infraction, disobedience, non-observance, infringement, contravention Their failure to comply with paragraph 3 is a clear breach of our contract 2 break, rift, gulf, split, break-up, separation, rupture, severance, schism, split, alienation, estrangement There seems to be no way to heal the breach between them 3 gap, fissure, crack, split, hole, opening; chasm Their cannon opened a breach in the castle wall
v. 4 rupture; break through, invade The sea has breached the dyke Someone breached the security measures set up for the missile design.