drug addiction

NOUN /drəg_ə'dɪkʃən/
14 LETTERS · STARTS WITH D

drug addiction is a valid 14-letter word worth 19 points in Scrabble and 23 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2R1U1G2A1D2D2I1C3T1I1O1N1
2 + 1 + 1 + 2 + 0 + 1 + 2 + 2 + 1 + 3 + 1 + 1 + 1 + 1 =19 PTS
DOUBLE WORD → 38TRIPLE WORD → 57
MEANING

What does drug addiction mean?