What defines a trespasser in premises liability?

A trespasser in premises liability is defined as a person who enters a property without the owner's permission or invitation. This classification is crucial in understanding premises liability because it influences the duty of care that property owners owe to individuals on their property.

When a person unlawfully enters a property, they do not have the legal right to be there, which generally limits the property owner's responsibility for injuries that occur as a result of that individual's presence. Unlike invited guests or those with permission who are owed a higher duty of care, trespassers are often only protected from willful or wanton misconduct. This principle helps define the legal obligations of property owners and how they must conduct themselves concerning unauthorized individuals on their premises.

In this context, the other options do not meet the criteria for defining a trespasser. For instance, someone invited to the property, anyone with permission, and a social guest all signify individuals who have lawful reasons to be present and thus fall outside the definition of a trespasser.