Definition of librarian noun from the Oxford Advanced Learner's Dictionary

 

librarian

 noun
noun
BrE BrE//laɪˈbreəriən//
 
; NAmE NAmE//laɪˈbreriən//
 
Professions
 
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a person who is in charge of or works in a library See related entries: Professions Word Origin late 17th cent. (denoting a scribe or copyist): from Latin librarius ‘relating to books’, (used as a noun) ‘bookseller, scribe’, + -an.
See the Oxford Advanced American Dictionary entry: librarian