Definition of Mafia
1 a
: a secret criminal society of Sicily or Italy
b
: a similarly conceived criminal organization in the U.S.;
also
: a similar organization elsewhere
- the Japanese Mafia
c
: a criminal organization associated with a particular traffic
- the cocaine Mafia
2
often not capitalized
: a group of people likened to the Mafia;
especially
: a group of people of similar interests or backgrounds prominent in a particular field or enterprise : clique
