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Meaning of KEYSTONE

Pronunciation:  'kee`stown

WordNet Dictionary
[n]  the central building block at the top of an arch or vault

KEYSTONE is a 8 letter word that starts with K.


 Synonyms: headstone
 See Also: arch, building block, coign, coigne, quoin



Webster's 1913 Dictionary
\Key"stone`\, n. (Arch.)
The central or topmost stone of an arch. This in some styles
is made different in size from the other voussoirs, or
projects, or is decorated with carving. See Illust. of

{Keystone State}, the State of Pennsylvania; -- so called
   from its having been the central State of the Union at the
   formation of the Constitution.

Thesaurus Terms
 Related Terms: apse, arcade, arcature, arch, arched roof, archway, basis, bench mark, camber, cardinal point, ceilinged roof, chief thing, climax, concameration, concha, core, cornerstone, cove, crisis, critical point, crux, cupola, dome, essence, essential, essential matter, first stone, footstone, foundation, foundation stone, fundamental, geodesic dome, gist, gravamen, great point, headstone, heart, high point, igloo, important thing, issue, kernel, landmark, main point, main thing, material point, meat, milestone, necessity, nub, ogive, pith, pivot, principle, quoin, real issue, salient point, sine qua non, skewback, span, substance, substantive point, the bottom line, the point, turning point, vault, vaulting, voussoir