- Mafia⇄Mafia orMaffia, noun.
1. a secret organization of criminals supposed to control underworld activities in various parts of the world.
2. a secret Sicilian society hostile to the law and practicing terrorism.
3. Also, mafia. any secret s - mafia⇄mafia ormaffia, noun.
the spirit of popular hostility to the law, manifesting itself frequently in criminal acts.