Usually means: Not open for further discussion.
Definitions Related words Phrases (New!) Mentions
We found 16 dictionaries that define the word closed book:

General (14 matching dictionaries)
  1. closed book: Merriam-Webster.com
  2. closed book: Oxford Learner's Dictionaries
  3. closed book: American Heritage Dictionary of the English Language
  4. closed book: Collins English Dictionary
  5. closed book: Vocabulary.com
  6. closed-book: Wordnik
  7. closed book: Cambridge Advanced Learner's Dictionary
  8. closed-book, closed book: Wiktionary
  9. closed book: Infoplease Dictionary
  10. closed book: Dictionary.com
  11. closed book: Rhymezone
  12. closed book: Free Dictionary
  13. closed book: Mnemonic Dictionary
  14. closed book: Dictionary/thesaurus

Computing (1 matching dictionary)
  1. closed book: Encyclopedia

Slang (1 matching dictionary)
  1. closed book: Urban Dictionary

(Note: See closed_books as well.)

Definitions from Wiktionary (closed book)

noun:  (idiomatic) A person or thing that cannot be easily understood; someone or something incomprehensible or puzzling.

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Words similar to closed book

Usage examples for closed book

Idioms related to closed book

Wikipedia articles (New!)

Words that often appear near closed book

Rhymes of closed book

Invented words related to closed book

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