Pronunciation: (ru-zhēm', rā-, or, sometimes, -jēm'),[key] —n. 1. a mode or system of rule or government: a dictatorial regime. 2. a ruling or prevailing system.
3. a government in power.
4. the period during which a particular government or ruling system is in power.
5. Med.regimen (def. 1). Also,ré•gime'.