hinge on

VERB
8 LETTERS · STARTS WITH H

hinge on is a valid 8-letter word worth 11 points in Scrabble and 13 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
H4I1N1G2E1O1N1
4 + 1 + 1 + 2 + 1 + 0 + 1 + 1 =11 PTS
DOUBLE WORD → 22TRIPLE WORD → 33
MEANING

What does hinge on mean?