fantasm

NOUN /fæntæzəm/
7 LETTERS · 2 SYLLABLES · STARTS WITH F

fantasm is a valid 7-letter word worth 12 points in Scrabble and 14 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
F4A1N1T1A1S1M3
4 + 1 + 1 + 1 + 1 + 1 + 3 =12 PTS
DOUBLE WORD → 24TRIPLE WORD → 36
MEANING

What does fantasm mean?