/ ˈbʌrə; NAmE ˈbɜːroʊ/ noun
a town or part of a city that has its own local government :
the London borough of Westminster
The Bronx is one of the five boroughs of New York.
a borough council
For more information see the Cultural Guide
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WORD ORIGIN
Old English burg , burh fortress, citadel , later fortified town , of Germanic origin; related to Dutch burg and German Burg . Compare with burgh .