Closed book
volume
British pronunciation/klˈəʊzd bˈʊk/
American pronunciation/klˈoʊzd bˈʊk/

Definizione e Significato di "closed book"

Closed book
01

libro chiuso, argomento sconosciuto

someone or something one knows very little or nothing about
closed book definition and meaning
IdiomIdiom
InformalInformal

What is the origin of the idiom "closed book" and when to use it?

The idiom "closed book" is believed to have originated in the 19th century. It is thought to have come from the literal meaning of a closed book, which is a book that is not open and cannot be read. The phrase "closed book" came to be used to describe someone or something that one knows very little or nothing about. It suggests that the person or thing in question is a mystery to the speaker.

example
Example
click on words
The workings of the stock market are a closed book to me – I do n't understand how it works.
The new technology is a closed book to most people – they're not familiar with it yet.
My new neighbor is a closed book to me – I do n't know anything about them.
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