Pronunciation: (lī-brâr'ē-un), [key]
1. a person trained in library science and engaged in library service.
2. a person in charge of a library, esp. the chief administrative officer of a library.
3. a person who is in charge of any specialized body of literature, as a collection of musical scores.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.