], borough of New York City (1990 pop. 2,300,664), 71 sq mi (184 sq km), coextensive with Kings co., SE N.Y., at the western extremity of Long Island
; an independent city from 1834, it became a New York borough in 1898. Brooklyn has the largest population of the city's five boroughs. Among its manufactures are machinery, textiles, paper products, and chemicals; it is also a center of foreign and domestic commerce and has extensive waterfront facilities. The Brooklyn (1883), Manhattan, and Williamsburg bridges span the East River, connecting Brooklyn with Manhattan; beneath the river are the Hugh L. Carey, or Brooklyn-Battery, Tunnel (vehicular) and subway tunnels. The Verrazano-Narrows Bridge connects the borough with Staten Island.
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