keystone

key·stone  (kstn)

n.

1. Architecture The central wedge-shaped stone of an arch that locks its parts together. Also called headstone.

2. The central supporting element of a whole.

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keystone

Noun

1. the most important part of a process, organization, etc.: the keystone of the government's economic policy

2. the central stone at the top of an arch

Thesaurus

Noun	1.	keystone - 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" backbone, linchpin, lynchpin, mainstay, anchor 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 headstone, key 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

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keystone

noun basis, principle, core, crux, ground, source, spring, root, motive, cornerstone, lynchpin, mainspring, fundament, quoin

Translations

keystone [ˈkiːstəun] n → piedra clave