I don’t know something…*sad face*
A self-governing incorporated town in some U.S. states, such as New Jersey. One of the five administrative units of New York City.
(New York) The term borough was adopted to describe a unique form of governmental administration for each of the five fundamental constituent parts of the newly consolidated city. Technically, under New York State Law, a “borough” is a municipal corporation that is created when a county is merged with populated areas within it. This differs significantly from typical borough forms of government used in Connecticut, New Jersey, Pennsylvania, Alaska, other states, Greater London, and elsewhere.
(New Jersey)sometimes abbreviated Boro on road signs) in the context of New Jersey local government refers to one of five types and one of eleven forms of municipal government.