a closed book

noun

Definition of a closed book

: a person or thing that is difficult to understand Even to his closest friends, he was always something of a closed book.

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Dictionary Entries Near a closed book

a clip round the ear

a closed book

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Cite this Entry

“A closed book.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/a%20closed%20book. Accessed 19 Sep. 2021.

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