CLOSED BOOK

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

Something that baffles understanding and cannot be explained

Example:

it remains one of nature's secrets

Synonyms:

closed book; enigma; mystery; secret

Classified under:

Nouns denoting cognitive processes and contents

Hypernyms ("closed book" is a kind of...):

perplexity (trouble or confusion resulting from complexity)

Credits