Google hat eine define-Funktion - interessant, was zum Beispiel bei der Eingabe von "define:librarian" alles kommt. Eine kleine Auswahl:
"a professional person trained in library science and engaged in library services" -
"a person who looks after the storage and retrieval of information" -
"a degreed professional who specializes in finding and managing information services and resources" -
"professional staff who select, acquire, organise and disseminate information and manage library services"...