Definition of library:
(n) :
an institution which holds books and/or other forms of stored information for use by certain people. It is usual, but not a defining feature of a library, for it to be housed in rooms of a building, to lend items of its collection to members either with or without payment, and to provide various other services for its community of users; a collection of books or other forms of stored information. An individual may refer to his collection of books and other items as his library