Burglary
Burglary (also called breaking and entering and sometimes housebreaking) is a crime, the essence of which is illicit entry into a building for the purposes of committing an offense. Usually that offense will be theft, but most jurisdictions specify others which fall within the ambit of burglary.
The common law elements of burglary often vary between jurisdictions. The common law definition has been expanded in most jurisdictions, such that the building need not be a dwelling or even a building in the conventional sense, physical breaking is not necessary, the entry does not need to occur at night, and the intent may be to commit any felony or theft.