gateway to the west

NOUN
19 LETTERS · STARTS WITH G

gateway to the west is a valid 19-letter word worth 29 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
G2A1T1E1W4A1Y4T1O1T1H4E1W4E1S1T1
2 + 1 + 1 + 1 + 4 + 1 + 4 + 0 + 1 + 1 + 0 + 1 + 4 + 1 + 0 + 4 + 1 + 1 + 1 =29 PTS
DOUBLE WORD → 58TRIPLE WORD → 87
MEANING

What does gateway to the west mean?

NOUN · 1 SENSE
1

The largest city in Missouri; a busy river port on the Mississippi River near its confluence with the Missouri River; was an important staging area for wagon trains westward in the 19th century.