closed books

noun

plural of closed book
as in mysteries
something hard to understand or explain the couple's unorthodox marriage is definitely a closed book to those outside of the relationship

Synonyms & Similar Words

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Example Sentences

Recent Examples of Synonyms for closed books
  1. mysteries
  2. puzzles
  3. secrets
Noun
  • In recent years, the typical Shears song has cloaked descriptions of paranormal encounters in hardcore distortion and cartoon sound effects, fleshing out the twins’ strange world while hinting at weirder mysteries beneath the surface.
    — Jude Noel, Pitchfork, 22 July 2026
  • Heavyweight was resurrected by Pushkin Industries so that host Jonathan Goldstein can still help people track down individuals from their past to resolve long-standing regrets or unresolved mysteries with a healthy dose of humor.
    — Frank Racioppi, Forbes.com, 20 July 2026
Definition of mysteries
Noun
  • Players navigate impossible architecture and perspective-bending puzzles as reality twists around them.
    — Destiny Jackson, Deadline, 23 July 2026
  • The lowest score came from The Guardian, which handed it two stars out of five, while Giant Bomb landed positive overall with a complaint that the boss fights lean on damage sponges more than puzzles.
    — Brian Mazique, Forbes.com, 22 July 2026
Definition of puzzles
Noun
  • Over the course of the weekend, secrets are revealed, including that Chan’s character Gigi had been having an affair with Hollis’ husband Matthew.
    — Leigh Nordstrom, Footwear News, 24 July 2026
  • After making Comic-Con history for debuting Spider-Man 2, the first video game to ever occupy Hall H, Insomniac Games and Sony Interactive clawed their way back to San Diego on Thursday to reveal gameplay secrets for the upcoming Marvel’s Wolverine.
    — Destiny Jackson, Deadline, 23 July 2026
Definition of secrets
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Browse Nearby Words

closed book
closed books
closed-captioning
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Cite this Entry

“Closed books.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/closed%20books. Accessed 28 Jul. 2026.

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