What is the definition of a museum?

Statistics Netherlands defines a museum as a permanent institution open to the general public, that obtains, stores, researches and exhibits collections about humans and their environment and provides information for study, education and pleasure.

Not included in the definition of museum are collections that are not open to the general public, e.g. from universities or private individuals, or with limited opening hours of less than 2 days a month, or by appointment only.