[n] the act of starting something for the first time; introducing something new
[n] an establishment consisting of a building or complex of buildings where an organization for the promotion of some cause is situated
[n] a hospital for mentally incompetent or unbalanced person
[n] a custom that for a long time has been an important feature of some group or society; "the institution of marriage"; "the institution of slavery"; "he had become an institution in the theater"
[n] an organization founded and united for a specific purpose