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English definition of “institution”

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institution

noun uk   /ˌɪn.stɪˈtjuː.ʃən/ us    /-ˈtuː-/

institution noun (ORGANIZATION)

B2 [C] a large and important organization, such as a university or bank: a medical/educational/financial institution Harvard University is an internationally respected institution.
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institution noun (PLACE)

B2 [C] mainly disapproving a building where people are sent to be cared for, especially a hospital or prison

institution noun (CUSTOM)

C2 [C] a custom or tradition that has existed for a long time and is accepted as an important part of a particular society: the venerable institution of marriage figurative Mrs Daly is an institution - she's been with the company for 40 years and knows absolutely everyone.

institution noun (START)

[U] an occasion when a law, system, etc. begins or is introduced: The institution of the Freedom of Information Act has had a significant effect.
(Definition of institution from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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