sliding fit

11 LETTERS · STARTS WITH S

sliding fit is a valid 11-letter word worth 15 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

S1L1I1D2I1N1G2F4I1T1

1 + 1 + 1 + 2 + 1 + 1 + 2 + 0 + 4 + 1 + 1 =15 PTS

DOUBLE WORD → 30TRIPLE WORD → 45

MEANING

What does sliding fit mean?