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institution (EN)
noun

noun “institution”

singular institution, plural institutions or uncountable
  1. an organization founded for a specific purpose, especially for education, public service, or charity
    The university is a respected institution with a strong tradition of academic excellence.
  2. a long-established custom, practice, or law in a society or community
    The institution of marriage varies greatly across different cultures.
  3. the act of establishing something; initiation or creation
    The institution of new environmental laws aims to protect the planet.
  4. (informal) a mental hospital or similar facility
    After struggling with his mental health, he spent a few months in an institution.
  5. (informal) a person who has been associated with a place or organization for a very long time
    After 50 years at the company, he is such an institution here.