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List of meaning for keystone

anchor, mainstay, keystone, backbone, linchpin, lynchpin(noun)

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"

keystone, key, headstone(noun)

the central building block at the top of an arch or vault

an immaterial thing upon which something else rests

a sense of history is the keystone to the city's draw as a tourist destination

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