superfluity

NOUN /,supər'fluɪti/
11 LETTERS · 5 SYLLABLES · STARTS WITH S

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

SCRABBLE WORDS WITH FRIENDS
S1U1P3E1R1F4L1U1I1T1Y4
1 + 1 + 3 + 1 + 1 + 4 + 1 + 1 + 1 + 1 + 4 =19 PTS
DOUBLE WORD → 38TRIPLE WORD → 57
MEANING

What does superfluity mean?