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Webster 1913 Edition


Keystone

Key′stoneˊ

,
Noun.
(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
Arch
.

Webster 1828 Edition


Keystone

KE'YSTONE

,
Noun.
The stone on the top or middle of an arch or vault, which being wider at the top than at the bottom, enters like a wedge and binds the work; properly, the fastening-stone.

Definition 2024


Keystone

Keystone

See also: keystone

English

Proper noun

Keystone

  1. A census-designated place in Colorado.
  2. A city/town in Iowa.
  3. A ghost town in North Dakota.
  4. A town in South Dakota.

keystone

keystone

See also: Keystone

English

Noun

keystone (plural keystones)

  1. (architecture) The top stone of an arch.
  2. Something on which other things depend for support.
  3. A native or resident of the American state of Pennsylvania.

Translations

Derived terms

Verb

keystone (third-person singular simple present keystones, present participle keystoning, simple past and past participle keystoned)

  1. (transitive) To distort (an image) by projecting it onto a surface at an angle, which for example causes a square to look like a trapezoid.

Anagrams