1. plural of establishment; organizations, institutions, or businesses that have been set up and are operating
Usage: countable noun; most common sense
2. the act or process of founding, creating, or setting up something
Usage: uncountable noun; formal
3. the group of people in positions of power and influence in society, government, or institutions (often used critically)
Usage: usually capitalized as 'the Establishment'; informal

Examples

• The city has many restaurants and retail establishments along Main Street.
• The establishment of the university dates back to 1850.
• Young artists often challenge the establishment with their unconventional work.
• Educational establishments must meet strict safety standards.
• The government announced the establishment of new environmental regulations.
• Several financial establishments merged to form a larger bank.