uncloudedness

NOUN
13 LETTERS · STARTS WITH U

uncloudedness is a valid 13-letter word worth 17 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
U1N1C3L1O1U1D2E1D2N1E1S1S1
1 + 1 + 3 + 1 + 1 + 1 + 2 + 1 + 2 + 1 + 1 + 1 + 1 =17 PTS
DOUBLE WORD → 34TRIPLE WORD → 51
MEANING

What does uncloudedness mean?