solidify

VERB /sə'lɪdə,faɪ/
8 LETTERS · 4 SYLLABLES · STARTS WITH S

solidify is a valid 8-letter word worth 15 points in Scrabble and 15 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
S1O1L1I1D2I1F4Y4
1 + 1 + 1 + 1 + 2 + 1 + 4 + 4 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does solidify mean?