es·tab·lish·ment / iˈstablishmənt/ • n. 1. the action of establishing something or being established: the establishment of a Palestinian state. ∎ the recognition by the state of a national church or religion: Congress shall make no law respecting an establishment of religion. 2. a business organization, public institution, or household: hotels or catering establishments. ∎ the premises or staff of such an organization: she entered this establishment as our housemaid. 3. (usu. the Establishment) a group in a society exercising power and influence over matters of policy or taste, and seen as resisting change. ∎ an influential group within a specified profession or area of activity: rumblings of discontent among the medical establishment.