mercantile establishment

NOUN
24 LETTERS · STARTS WITH M

mercantile establishment is a valid 24-letter word worth 34 points in Scrabble and 41 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
M3E1R1C3A1N1T1I1L1E1E1S1T1A1B3L1I1S1H4M3E1N1T1
3 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 4 + 3 + 1 + 1 + 1 =34 PTS
DOUBLE WORD → 68TRIPLE WORD → 102
MEANING

What does mercantile establishment mean?