Definition of reference book noun from the Oxford Advanced Learner's Dictionary

 

reference book

 noun
noun
BrE BrE//ˈrefrəns bʊk//
 
; NAmE NAmE//ˈrefrəns bʊk//
 
 
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a book that contains facts and information, that you look at when you need to find out something particular dictionaries, encyclopedias and other reference books
See the Oxford Advanced American Dictionary entry: reference book