régime

from The Century Dictionary.

• noun In medicine, same as regimen, 2.
• noun In physical geography, the dominant or controlling behavior of a river with respect to current, floods, etc.; by analogy, the controlling behavior of ocean currents, meteorological phenomena, etc.
• noun Mode, system, or style of rule or management; government, especially as connected with certain social features; administration; rule.
• noun In French law, specifically, the system of property rights under the marriage relation, fixed upon by the parties by an ante-nuptial contract.

from the GNU version of the Collaborative International Dictionary of English.

• noun Mode or system of rule or management; character of government, or of the prevailing social system.
• noun (Hydraul.) 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 régime being the condition when the flow is equal and uniform at all the cross sections.
• noun the former political and social system, as distinguished from the modern; especially, the political and social system existing in France before the Revolution of 1789.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun Alternative spelling of regime.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun (medicine) a systematic plan for therapy (often including diet)
• noun the organization that is the governing authority of a political unit