[n] the act of forming 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] a public or private structure (business or governmental or educational) including buildings and equipment for business or residence
[n] the cognitive process of establishing a valid proof
[n] an organization founded and united for a specific purpose
[n] any large organization
[n] the 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] (ecology) the process by which a plant or animal becomes established in a new habitat