keystone
English Dictionary
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keystone Definition
(n)
a
central
cohesive
source
of
support
and
stability
; "
faith
is
his
anchor
"; "
the
keystone
of
campaign
reform
was
the
ban
on
soft
money
"; "
he
is
the
linchpin
of
this
firm
"
(n)
the
central
building
block
at
the
top
of
an
arch
or
vault
keystone Synonyms
anchor
backbone
headstone
key
keystone
linchpin
lynchpin
mainstay
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