1. A place in which literary and artistic materials, such as books, periodicals, newspapers, pamphlets, prints, records, and tapes, are kept for reading, reference, or lending. 2. A collection of such materials, especially when systematically arranged. 3. A room in a private home for such a collection. 4. An institution or a foundation maintaining such a collection. 5. A commercial establishment that lends books for a fee. 6. A series or set of books issued by a publisher. 7. A collection of recorded data or tapes arranged for ease of use. 8. A collection of standard programs, routines, or subroutines, often related to a specific application, that are available for general use.
