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English Fox - English Dictionary
Meaning of
keystone
in English
keystone
us
/ˈkiːstoʊn/
uk
/ˈkiːstoʊn/
#common
Plural
keystones
Definitions
Noun
a
person
from
Pennsylvania
the
top
stone
in
an
arch
a
central
element
providing
support
;
stability
