Open English Wordnet
Nouns
(n)constitution, establishment, formation, organization, organisationthe act of forming or establishing something“the constitution of a PTA group last year”, “it was the establishment of his reputation”, “he still remembers the organization of the club”
(n)administration, governance, governing body, establishment, brass, organization, organisationthe persons (or committees or departments etc.) who make up a body for the purpose of administering something“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”
(n)establishmenta public or private structure (business or governmental or educational) including buildings and equipment for business or residence
(n)establishment, ecesis(ecology) the process by which a plant or animal becomes established in a new habitat