keystone

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key·stone

 (kē′stōn′)
n.
1. Architecture A wedge-shaped stone at the top of an arch, often larger or more ornamented than the other voussoirs. Also called headstone.
2. The central supporting element of a whole.

keystone

(ˈkiːˌstəʊn)
n
1. (Building) Also called: headstone or quoin the central stone at the top of an arch or the top stone of a dome or vault
2. something that is necessary to connect or support a number of other related things

key•stone

(ˈkiˌstoʊn)

n.
1. the wedge-shaped piece at the summit of an arch, regarded as holding the other pieces in place.
2. something on which associated things depend; foundation.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.keystone - a central cohesive source of support and stabilitykeystone - 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"
support - something providing immaterial assistance to a person or cause or interest; "the policy found little public support"; "his faith was all the support he needed"; "the team enjoyed the support of their fans"
2.keystone - the central building block at the top of an arch or vault
arch - (architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it
building block - a block of material used in construction work
coign, coigne, quoin - the keystone of an arch

keystone

noun basis, principle, core, crux, ground, source, spring, root, motive, cornerstone, lynchpin, mainspring, fundament, quoin the keystone of the government's economic policy
Translations

keystone

[ˈkiːstəʊn] N (Archit) → dovela f (fig) → piedra f angular

keystone

[ˈkiːstəʊn] n
[arch] → clé f de voûte
[policy, system, process] → clé f de voûte

keystone

[ˈkiːˌstəʊn] nchiave f di volta
References in periodicals archive ?
It is wonderful to see young people involve themselves in Keystoning at the clubs," said Hillary Niblo, executive director, Taco Bell Foundation.
This annoyance is known as keystoning because the distorted image resembles the center stone in an arch.