closed book
Americannoun
noun
-
something deemed unknown or incapable of being understood
-
a matter that has been finally concluded and admits of no further consideration
Etymology
Origin of closed book
First recorded in 1910–15
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Mr Ba may have been on the political scene for the last decade, but he is a bit of a closed book for most.
From BBC ● Mar. 22, 2024
“As you know, I’m not normally a closed book on this stuff,” Sean told me.
From Washington Post ● Apr. 26, 2023
When she was growing up, Xie said, stories about this era were a closed book.
From New York Times ● Sep. 19, 2022
The closed book history of that World Cup quarter-final, an event most people will have watched once, 34 years ago, states that the game was pretty much even.
From The Guardian ● Apr. 26, 2020
Put your hands together tight like a closed book.
From "A Step from Heaven" by An Na
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Get a wordDefinitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
