ungradable opposition

NOUN
21 LETTERS · STARTS WITH U

ungradable opposition is a valid 21-letter word worth 28 points in Scrabble and 36 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
U1N1G2R1A1D2A1B3L1E1O1P3P3O1S1I1T1I1O1N1
1 + 1 + 2 + 1 + 1 + 2 + 1 + 3 + 1 + 1 + 0 + 1 + 3 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =28 PTS
DOUBLE WORD → 56TRIPLE WORD → 84
MEANING

What does ungradable opposition mean?

NOUN · 1 SENSE
1

An opposition that has no intermediate grade; either one or the other.