Library meaning : An institution which holds books and/or other forms of media for use by the public or qualified people often lending them out, as well as providing various other services for its users. (by extension) Any institution that lends out its goods for use by the public or a community. A collection of books or other forms of stored information. An equivalent collection of analogous information in a non-printed form, e.g. record library. A room dedicated to storing books. A collection of software routines that provide functionality to be incorporated into or used by a computer program. A collection of DNA material from a single organism or relative to a single disease. The deck or draw pile.