Regime

Noun

1. Mode of rule or management.

   "a prison regime"

2. A form of government, or the government in power, particularly an authoritarian or totalitarian one.

   "the dictator's regime"

3. A period of rule.
4. A regulated system; a regimen.

   "a fitness regime"

5. A division of a Mafia crime family, led by a caporegime.