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English definition of “book”

book

noun     /bʊk/
[C] a set of pages in a cover that you read or write in: book about/on sth She is author of three books about criminal procedure. The company publishes an extensive range of books. children's/reference/self-help books an address book
go by the book (also do sth by the book) to do something exactly as the rules tells you: My lawyer always goes strictly by the book. This is a private deal - we don't have to do everything by the book.
on the books employed by a company or officially belonging to an organization: There are 256 people on the books at the cement works. Carla is on the books of a modelling agency.
(Definition of book noun from the Cambridge Business English Dictionary © Cambridge University Press)
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