crowd - a large number of things or people considered together; "a crowd of insects assembled around the flowers"

lynch mob - a mob that kills a person for some presumed offense without legal authority

gangdom, gangland, organized crime - underworld organizations

Cosa Nostra, Maffia, Mafia - a crime syndicate in the United States; organized in families; believed to have important relations to the Sicilian Mafia

association - a formal organization of people or groups of people; "he joined the Modern Language Association"

nest - a gang of people (criminals or spies or terrorists) assembled in one locality; "a nest of thieves"

youth gang - a gang whose members are teenagers

gangdom, gangland, organized crime - underworld organizations

gangster, mobster - a criminal who is a member of gang

crowd together, crowd - to gather together in large numbers; "men in straw boaters and waxed mustaches crowded the verandah"