institution
in-sti-tu-tion
noun
A long-established and accepted custom, practice, or system in society.
"Marriage is a fundamental social institution."
noun
A large, established organisation providing a public service or function.
"The university is a respected educational institution."
Thesaurus
Synonyms: instauration, innovation, origination, introduction, founding, initiation, foundation, creation, establishment, insane asylum, asylum, psychiatric hospital