Etymology

Recorded since c.1374, from Anglo-French librarie, from librairie "collection of books", a noun use of adjective librarius "concerning books", itself from librarium "chest for books", from from liber "book, paper, parchment, originally the inner bark of trees", probably from a Proto-Indo-European base *leub(h)- "to strip, to peel"

Noun

1. The keeper, manager of a library
2. One who cares for the publications, files etc. in a library, whether staff or volunteer
3. A person who processes and organizes information