Regime

Mode or system of rule or management; character of government, or of the prevailing social system.

The condition of a river with respect to the rate of its flow, as measured by the volume of water passing different cross sections in a given time, uniform regime being the condition when the flow is equal and uniform at all the cross sections.

(medicine) a systematic plan for therapy (often including diet)

the organization that is the governing authority of a political unit; "the government reduced taxes"; "the matter was referred to higher authorities"