closed book

Other forms: closed books

Definitions of closed book
  1. noun
    something that baffles understanding and cannot be explained
    synonyms: enigma, mystery, secret
    see moresee less
    type of:
    perplexity
    trouble or confusion resulting from complexity
Cite this entry
Style:
MLA
  • MLA
  • APA
  • Chicago

Copy citation
DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘closed book'. Views expressed in the examples do not represent the opinion of Vocabulary.com or its editors. Send us feedback
Word Family