1. a town or district which is an administrative unit.
▪ a town (as distinct from a city) with a corporation and privileges granted by a royal charter.
▪ a town sending representatives to Parliament.
▪ an administrative division of London.
▪ a municipal corporation in certain US states.
▪ each of five divisions of New York City.
▪ (in Alaska) a district corresponding to a county elsewhere in the US.
Word OriginOld Englishburg, burh ‘fortress, citadel’, later ‘fortified town’, of Germanic origin; related to Dutch burg and German Burg. Compare with burgh.
A borough is an administrative division in various English-speaking countries. In principle, the term borough designates a self-governing walled town, although in practice, official use of the term varies widely. Wikipedia