Search Result for "closed_book":
Wordnet 3.0

NOUN (1)

1. something that baffles understanding and cannot be explained;
- Example: "how it got out is a mystery"
- Example: "it remains one of nature's secrets"
[syn: mystery, enigma, secret, closed book]



WordNet (r) 3.0 (2006):

closed book
    n 1: something that baffles understanding and cannot be
         explained; "how it got out is a mystery"; "it remains one
         of nature's secrets" [syn: mystery, enigma, secret,
         closed book]