closed book
Use Closed book in a sentenceclosed book
noun
something that is not known or cannot be understood; a mystery or puzzle: Abstract art is a closed book as far as I'm concerned.
Origin:
1910–15
1910–15
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
|
Link To closed book
Collins
World English Dictionary
| closed book | |
| —n | |
| 1. | something deemed unknown or incapable of being understood |
| 2. | a matter that has been finally concluded and admits of no further consideration |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
00:10
Closed book
is always a great word to know.
So is ninnyhammer. Does it mean:
| the offspring of a zebra and a donkey. |
| a fool or simpleton; ninny. |
Example sentences
The examinations are closed book, so no reference materials, papers or study materials are allowed at the test center.
The exam should be closed book and closed notes, but seen beforehand.
If you do not earn the required credits, a closed book recertification examination is available as an alternative.
She manages to be at once a closed book and a constant noisemaker.
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