closed book

WordNet-Online
Free dictionary and thesaurus of English. Definitions, synonyms, antonyms and more...
Hint: double-click any word to get it searched!

Definitions from WordNet

Noun closed book has 1 sense

mystery, enigma, secret, closed book - something that baffles understanding and cannot be explained; "how it got out is a mystery"; "it remains one of nature's secrets"
--₁ is a kind of perplexity

Definitions from the Web

Closed Book

Definition: (noun) A subject or topic about which someone has little or no knowledge or understanding.

Sense 1: (idiomatic) A subject or topic that is difficult to understand or remains a mystery.

Example sentence: Physics has always been a closed book to me; I never understood the principles of motion.

Sense 2: (idiomatic) A person who is secretive and does not reveal their thoughts or feelings.

Example sentence: She is a closed book when it comes to her personal life; no one knows what she's really thinking.

Related Products:

closed-formula closed-heart surgery closed-loop closed-loop system closed-minded closed-off closed-ring closed closed book closed chain closed circuit closed corporation closed couplet closed cracefully closed curve closed fracture closed gentian

Sponsored (shop thru our affiliate link to help maintain this site):

Check latest bestsellers | New Arrivals in Electronics