In politics, a regime (also known as "régime", from the original French spelling) is the form of government or the set of rules, cultural or social norms, etc. that regulate the operation of a government or institution and its interactions with society.

In other words, regimes can be defined as sets of protocols and norms embedded either in institutions or institutionalized practices – formal such as states or informal such as the "liberal trade regime" – that are publicly enacted and relatively enduring.[5]