keystone

English Dictionary -> Letter K -> keystone

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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