automatic rifle

NOUN /,ɔtə'mætɪk_'raɪfəl/
15 LETTERS · STARTS WITH A

automatic rifle is a valid 15-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
A1U1T1O1M3A1T1I1C3R1I1F4L1E1
1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 3 + 0 + 1 + 1 + 4 + 1 + 1 =21 PTS
DOUBLE WORD → 42TRIPLE WORD → 63
MEANING

What does automatic rifle mean?