2. Something established, as:
a. A permanent civil, political, or military organization: “Overgrown military establishments … under any form of government, are inauspicious to liberty” (George Washington).
b. An established church.
c. A place of residence or business with its possessions and staff.
d. A public or private institution, such as a hospital or school.
3. often
Establishment An established social order, as:
a. A group of people holding most of the power and influence in a government or society. Often used with the.
b. A controlling group in a given field of activity. Often used with the.