Burglary under Florida Statute § 810.02 means entering a structure or conveyance with intent to commit an offense inside. Florida is unusually aggressive here: burglary of a dwelling with a person present is a first-degree felony (up to life), other dwelling burglaries are second-degree, and non-dwelling burglaries third-degree. Defenses include consent or license to enter, lack of intent at the time of entry (intent formed later defeats the charge), and open-door/doctrine disputes.