What does "institution" mean?

Institution: That which instituted or established; as: (a) Established order, method, or custom; enactment; ordinance; permanent form of law or polity. The nature of our people, Our city's institutions. Shak. (b) An established or organized society or corporation; an establishment, especially of a public character, or affecting a community; a foundation; as, a literary institution; a charitable institution; also, a building or the buildings occupied or used by such organization; as, the Smithsonian Institution. (c) Anything forming a characteristic and persistent feature in social or national life or habits. We ordered a lunch (the most delightful of English institutions, next to dinner) to be ready against our return. Hawthorne.