positive polarity

17 LETTERS · STARTS WITH P

positive polarity is a valid 17-letter word worth 26 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

P3O1S1I1T1I1V4E1P3O1L1A1R1I1T1Y4

3 + 1 + 1 + 1 + 1 + 1 + 4 + 1 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 4 =26 PTS

DOUBLE WORD → 52TRIPLE WORD → 78

MEANING

What does positive polarity mean?