Origin: 1300-1400 Medieval Latin librarium, from Latin liber book
1 a room or building containing books that you can read there or borrow → bookstore: a public library library books2a group of books, records, etc. collected by one person: his personal record library3a set of books, records, etc. that are produced by the same company and have the same general appearance: a library of modern classics4a room in a large house where most of the books are kept [Origin: 1300–1400 Medieval Latin librarium, from Latin liber book]