error of closure

16 LETTERS · STARTS WITH E

error of closure is a valid 16-letter word worth 19 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

E1R1R1O1R1O1F4C3L1O1S1U1R1E1

1 + 1 + 1 + 1 + 1 + 0 + 1 + 4 + 0 + 3 + 1 + 1 + 1 + 1 + 1 + 1 =19 PTS

DOUBLE WORD → 38TRIPLE WORD → 57

MEANING

What does error of closure mean?