ancien régime
noun
(pl. anciens régimes. 读音同)
1- a political or social system that has been displaced, typically by one that is more modern（已被新制度取代的）旧制度。
1.1
Ancien Régime
the political and social system in France before the Revolution of 1789.（法国1789年革命前的）旧制度。
词源
French， literally 'old rule'.