Search
Home page
Browse
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
#
Store
Blog
Advertise
Add a definition
User settings
Browse
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
#
Store
Blog
Advertise
Search
keystone
Share definition
The central wedge-shaped
stone
of an
arch
that
locks
its parts together.
Without
the keystone
the arch
would
fall down
.
by
meep116
July 27, 2006
Flag
Get the
keystone
mug.
More random definitions