establishment

(noun) the act of forming or establishing something. Synonyms: constitution, formation, organization, organisation. Examples: "The constitution of a pta group last year." "It was the establishment of his reputation." "He still remembers the organization of the club."

(noun) an organization founded and united for a specific purpose. Synonyms: institution.

(noun) the persons (or committees or departments etc.) who make up a body for the purpose of administering something. Synonyms: administration, governance, governing body, brass, organization, organisation. Examples: "He claims that the present administration is corrupt." "The governance of an association is responsible to its members." "He quickly became recognized as a member of the establishment."

(noun) a public or private structure (business or governmental or educational) including buildings and equipment for business or residence.

(noun) any large organization.

(noun) (ecology) the process by which a plant or animal becomes established in a new habitat. Synonyms: ecesis.

(noun) the cognitive process of establishing a valid proof. Synonyms: validation.