Word.ws English Dictionary

closed books

closed books is the plural of closed book.

Meaning of closed book

Noun

closed book (plural closed books)

  1. (idiomatic) A person or thing that cannot be easily understood; someone or something incomprehensible or puzzling.
    • Her courteous, sedate, inexorable husband, whose will she could not bend, whom she could not cajole, whose mind was a closed book to her — a book which had lain by her hand for three years, which she had never had the curiosity to open!1906, Mary Cholmondeley, Prisoners: Fast Bound in Misery and Iron

Questions about closed books

What is closed books the plural of?
Closed books is the plural of closed book.

Words near closed books in the dictionary

  1. closed ball
  2. closed balls
  3. closed beta
  4. closed betas
  5. closed book
  6. closed books
  7. closed campus
  8. closed campuses
  9. closed caption
  10. closed captioning
  11. closed captions

Source and license

Adapted from Wiktionary: closed books (page history and authors); closed book (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “closed books.” Word.ws, https://word.ws/closed_books. Based on Wiktionary, CC BY-SA 4.0.