"mafias" in the noun sense
1. Mafia, Maffia, Cosa Nostra
a crime syndicate in the United States organized in families believed to have important relations to the Sicilian Mafia
2. Mafia, Maffia, Sicilian Mafia
a secret terrorist group in Sicily originally opposed tyranny but evolved into a criminal organization in the middle of the 19th century
3. mafia, maffia
any tightly knit group of trusted associates
Source: WordNet® (An amazing lexical database of English)
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