Thesaurus results for CLOSED BOOKS

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

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Recent Examples of Synonyms for closed books

Noun

For new discoveries, everyday mysteries, and the science behind the headlines, follow NPR's Short Wave podcast.

— Will Stone, NPR, 8 July 2026
However, even though the JWST has been able to use its MIRI (Mid-Infrared Instrument) and NIRCam (Near-Infrared Camera) to study Centaurus A like never before, there are still mysteries to be solved about this structure.

— Robert Lea, Space.com, 7 July 2026

Definition of mysteries

Noun

My demo partner and I explored the colony at our own pace, interacting with the cooperative puzzles and mini-games.

— Zackery Cuevas, PC Magazine, 7 July 2026
Using a seamless combination of FaceTime calls, CCTV and news footage, and investigators’ video evidence, Aneesh Chaganty weaves a riveting, anxious, and classically creepy found footage movie that puzzles until its final moments.

— Declan Gallagher, Entertainment Weekly, 7 July 2026

Definition of puzzles

Noun

Residents are strictly governed by regulations and believe the outside world is toxic, but the protagonist, an engineer named Juliette Nichols, begins to uncover secrets about the Silo’s history and the truth behind their world.

— Erik Kain, Forbes.com, 12 July 2026
Norway’s inimitable striker Erling Haaland is the obvious star of the highlight reel, but one of the many secrets of their success can be found in stoppage time of the game against five-time world champion Brazil.

— Don Riddell, CNN Money, 11 July 2026

Definition of secrets

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“Closed books.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/closed%20books. Accessed 13 Jul. 2026.

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noun

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