There are multiple definitions - click on the translation that matches your context.
breach means:
Substantiv
partial
noun
Since a "breach of contract" is a much broader concept than Verzug, we would caution against using this partial equivalent, unless the context is very general and does not address the specific elements of this form of performance irregularity.
a gap in a wall, barrier, or defence, especially one made by an attacking army
They held back the enemy despite the breach of a critical gate.
a serious disagreement or break in relations between people, groups, or countries
Article 45 deals with the breach of relations between States.
an act of unauthorized entry into, or corruption of, information stored on computer, especially by a hacker or as part of a cyber attack
The company has taken further measures to protect customer data since the breach.