- 1the Mafia [singular] a secret organization of criminals, that is active especially in Sicily, Italy, and the U.S. a Mafia boss Large areas of the city were controlled by the Mafia.
- 2mafia [countable] a group of people within an organization or a community who use their power to get advantages for themselves a member of the local mafia Politics is still dominated by the middle-class mafia.
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