It usually just means that you know how to use a library... how to look up things about certain subjects, how to get to the right area if you are browsing by topic, or how to find a specific book you are looking for.
It means 'librarian'.
A librarian.
Dont go back to that library! "Proffesor" Timble A. Scott
The librarian in charge is usually called the Chief Librarian.
The possessive form of the singular noun librarian is librarian's.Example: The librarian's desk was stacked with books.
Librarian and password
Librarian
At a private library the librarian is employed by the library. The librarian at a school is employed by the school.
The word "librarian" in French is "bibliothécaire."
[Dictionary.com] - A person trained in library science and engaged in library service
The possessive form is librarian's.
"The Librarian: Quest for the Spear" (2004). "The Librarian: Return to King Solomon's Mines" (2006). "The Librarian: The Curse of the Judas Chalice" (2008).