1.NounThe act or process of establishing; a ratifying or ordaining; settlement; confirmation.
"Since their establishment of the company in 1984, they have grown into a global business."
2.NounThe state of being established, founded, etc.; fixed state.
"The firm celebrated twenty years since their establishment by updating their look."
3.NounThat which is established; as a form of government, a permanent organization, business or force, or the place where one is permanently fixed for residence.
"Pedro's is a fine establishment serving a variety of delicious food.; exposing the shabby parts of the establishment"
4.NounThe ruling class or authority group in a society; especially, an entrenched authority dedicated to preserving the status quo.
"It was clear that they viewed the British establishment as qualitatively different from the French establishment.; It's often necessary to question the establishment to get things done."
5.NounThe number of staff required to run a department or organisation (often used in the context of healthcare and other public services).
"The cancer department has an establishment of 10 doctors and 30 nurses."
6.NounThe institution and official status of a church as a state church, especially that of the Church of England and historically of Ireland.