What is the term for unauthorized entry into a building?

The term for unauthorized entry into a building is commonly referred to as trespass. Trespass is a legal concept that occurs when an individual enters someone's property without permission, thereby violating the property owner’s rights. It is important to note that this term encompasses various forms of unauthorized entry, regardless of the individual's intent or whether they caused damage.

In the context of security and law enforcement, understanding the distinction between burglary and trespass is crucial. Burglary typically involves illegal entry with the intent to commit a crime, such as theft, inside the building. While both terms involve unauthorized entry, they differ significantly in meaning and legal implications. The other options, like breach of contract, relate to violations in an agreement rather than physical entry into a property, making them irrelevant in this context. Intrusion may suggest an unwelcome presence but lacks the precise legal definition that 'trespass' embodies.