Closed Book (Noun)
Meaning
Something that baffles understanding and cannot be explained; "how it got out is a mystery"; "it remains one of nature's secrets".
Classification
Nouns denoting cognitive processes and contents.
Examples
- The origins of the ancient city remain a closed book to this day, despite numerous archaeological expeditions.
- The artist's creative process is a closed book, known only to a select few.
- The murder case files are still a closed book, with the killer remaining at large after all these years.
- How the two people, separated by time and space, ended up having identical marks on their palms remains a closed book to many.
- The patient's mysterious sleep disorder, causing vivid dreams but no memory of them upon waking, has been a closed book to the medical professionals for years.