Yahoo Canada Web Search
Yahoo Canada
Settings
Home
News
Mail
Finance
Weather
Sports
Sign In
Search query
All
Images
Videos
News
Local
Anytime
Past day
Past week
Past month
Past month
Search results
Dictionary
keystone
/ˈkiːstəʊn/
noun
1.
a central stone at the summit of an arch, locking the whole together.
Similar
cornerstone
central stone
quoin
▪
the central principle or part of a policy, system, etc., on which all else depends:
"cooperation remains the keystone of the government's security policy"
Similar
foundation
basis
linchpin
cornerstone
base
principle
guiding principle
core
heart
centre
crux
fundament
mainspring
priority
Scrabble Points: 15
K
5
E
1
Y
4
S
1
T
1
O
1
N
1
E
1
Powered by
Oxford Dictionaries
More definitions, origin and scrabble points
Related searches
define keystone
species
Settings
Help
Privacy
Terms
Privacy Dashboard
About ads
Powered by Bing™