closed book

NOUN
11 LETTERS · STARTS WITH C

closed book is a valid 11-letter word worth 19 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3L1O1S1E1D2B3O1O1K5
3 + 1 + 1 + 1 + 1 + 2 + 0 + 3 + 1 + 1 + 5 =19 PTS
DOUBLE WORD → 38TRIPLE WORD → 57
MEANING

What does closed book mean?

NOUN · 1 SENSE
1

Something that baffles understanding and cannot be explained.

BROADER