decriminalise

VERB
13 LETTERS · STARTS WITH D

decriminalise is a valid 13-letter word worth 18 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2E1C3R1I1M3I1N1A1L1I1S1E1
2 + 1 + 3 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =18 PTS
DOUBLE WORD → 36TRIPLE WORD → 54
MEANING

What does decriminalise mean?