Quick definitions from WordNet (closed book)
▸ noun: something that baffles understanding and cannot be explained
▸ Also see closed_book
▸ Words similar to closed books
▸ Usage examples for closed books
▸ Words that often appear near closed books
▸ Rhymes of closed books
▸ Invented words related to closed books
▸ noun: something that baffles understanding and cannot be explained
▸ Also see closed_book
▸ Words similar to closed books
▸ Usage examples for closed books
▸ Words that often appear near closed books
▸ Rhymes of closed books
▸ Invented words related to closed books