Meaning of “establishment” - Learner’s Dictionary

establishment

noun uk us /ɪˈstæblɪʃmənt/
ORGANIZATION [ C ]
STARTING [ U ]

the process of starting an organization, school, business, etc:

the establishment of a new national bank
the Establishment

the people and organizations that have most power and influence in a country

the legal/medical, etc establishment

the group of people with most influence in a particular area of work or activity

(Definition of “establishment” from the Cambridge Learner’s Dictionary © Cambridge University Press)