open book

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See also: open-book

English

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Pronunciation

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Noun

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open book (plural open books)

  1. (idiomatic) Something of which salient aspects are obvious or easily interpreted.
    • 1860, Abby Maria Hemenway, “The Priest and The Maiden”, in Poets and Poetry of Vermont:
      There is one, with a dark and thoughtful eye,
      Who is to all others a mystery;
      But his soul is to me an open book,
      And I read his mood in his slightest look; ...
    • 1898, John Wesley Powell, Truth and Error or the Science of Intellection:
      This is the secret of Hegel, and the key to his hieroglyphics, and, if consistently used to interpret the sayings of his logic, it becomes an open book.
    • 1921, Edgar Rice Burroughs, Tarzan the Untamed:
      On the surface of the ground or through the swaying branches of the trees the spoor of man or beast was an open book to the ape-man, but even his acute senses were baffled by the spoorless trail of the airship.
    • 2009, May 21, Barack Obama, speech, Protecting Our Security and Our Values
      But I have never argued – and never will – that our most sensitive national security matters should be an open book.
  2. (idiomatic) A person who through naivete responds candidly to questions or openly displays their emotions or intentions.
    • 1986, Adrienne von Speyr, Hans Urs von Balthasar, The Christian State of Life:
      He is an open book. Everyone can see that he removes nothing, conceals nothing, reserves nothing for himself.
    • 1997, Matthew J. DeLuca, Best Answers to the 201 Most Frequently Asked Interview Questions:
      Chapter 3: Are You an Open Book? How Much Do I Need to Disclose?
    • 2002, Linda Lange, Feminist Interpretations of Jean-Jacques Rousseau:
      Emile's most striking characteristic is that he hides nothing. He is an open book, acting the same in private as in public — "Emile is worse at disguising his feelings than any man in the world."
  3. (mathematics, topology) An open book decomposition.
  4. (climbing) An inside angle in the rock.

Synonyms

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Antonyms

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  • (antonym(s) of person who is candid): closed book
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Translations

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See also

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Further reading

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