printing machine

NOUN
16 LETTERS · STARTS WITH P

printing machine is a valid 16-letter word worth 25 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
P3R1I1N1T1I1N1G2M3A1C3H4I1N1E1
3 + 1 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 3 + 1 + 3 + 4 + 1 + 1 + 1 =25 PTS
DOUBLE WORD → 50TRIPLE WORD → 75
MEANING

What does printing machine mean?