Definitions

1. noun

A local political organization, especially one that exercises corrupt or undue influence in a city or town.

“The city’s government was controlled by the Tammany Hall organization.”

2. proper noun

The Tammany Society, a fraternal organization founded in 1786 in New York City, or the Democratic Party organization that controlled New York City politics from the 18th to the mid-20th century.

“Tammany Hall was a powerful force in New York City politics for over a century.”