Which term best describes unlawful entry into a building with the intent to commit a crime?

The term that best describes unlawful entry into a building with the intent to commit a crime is burglary. Burglary is specifically defined as entering a structure without permission with the intent to commit a crime, which directly aligns with the description provided in the question. This unlawful entry can occur in various ways and typically involves an intention to commit theft or another crime once inside.

In the context of law, burglary encompasses not only the physical act of entering a space but also the mental element of intent. This intent aspect is critical; without the intent to commit a crime inside, the act may not qualify as burglary.

While trespassing refers to entering someone’s property without permission, it does not necessarily involve any intent to commit a crime. Breaking and entering generally involves breaking an entryway or barrier but, like trespassing, might not include the intent to commit an additional crime. Robbery, on the other hand, specifically involves taking property from a person through force or intimidation, which is distinct from the unlawful entry associated with burglary.