Definitions:

1. a personal or social separation, as between opposing factions noun
   • A breach opened up between the two friends that could never be fixed.
2. to act in disregard of laws, rules, contracts, or promises verb
   • Your actions obviously breached the rules we had set in place.
3. to make an opening or gap in verb
   • We need to breach the castle wall if we wish to severely penetrate their defenses.

Synonyms:

• break
• falling out
• gap
• rift
• rupture
• severance