Definitions of maffia:

• noun:   any tightly knit group of trusted associates
• noun:   a secret terrorist group in Sicily; originally opposed tyranny but evolved into a criminal organization in the middle of the 19th century
• noun:   a crime syndicate in the United States; organized in families; believed to have important relations to the Sicilian Mafia
• name:  A surname (very rare: popularity rank in the U.S.: #40017)