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Wiktionary
institutionalisation

alt. (label en British spelling) the process of embedding something within an organisation or society as an established custom or norm. n. (label en British spelling) the process of embedding something within an organisation or society as an established custom or norm.

Wikipedia
Institutionalisation

Institutionalisation refers to the process of embedding some conception (for example a belief, norm, social role, particular value or mode of behavior) within an organization, social system, or society as a whole. The term may also be used to refer to committing a particular individual or group to an institution, such as a mental or welfare institution. The term may also be used in a political sense to apply to the creation or organization of governmental institutions or particular bodies responsible for overseeing or implementing policy, for example in welfare or development.

In the United States and most other developed societies, severe restrictions have been placed on the circumstances under which a person may be committed or treated against their will as such actions have been ruled by the United States Supreme Court and other national legislative bodies as a violation of civil rights and/or human rights (see e.g. O'Connor v. Donaldson). Thus a person is rarely committed against their will and it is illegal for a person to be committed for an indefinite period of time.