Webster's Revised Unabridged Dictionary · 1913

Régime

Régime (r?`zh?m") , noun

[F. See Regimen.]

1.
Mode or system of rule or management; character of government, or of the prevailing social system.
I dream... of the new régime which is to come. — H. Kingsley
2.
(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.
Collocations (1)
The ancient régime or Ancien régime , 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.

Also: Regime