'ARCH, n. See Arc.
1. A segment or part of a circle. A concave or hollow structure of stone or brick, supported by its own curve. It may be constructed of wood, and supported by the mechanism of the work. This species of structure is much used in bridges.
A vault is properly a board arch.
2. The space between two piers of a bridge, when arched or any place covered with an arch.
3. Any curvature, in form of an arch.
4. The vault of heaven, or sky.
Triumphal arches are magnificent structures at the entrance of cities, erected to adorn a triumph and perpetuate the memory of the event.
'ARCH, To cover with an arch to form with a curve as to arch a gate.
The King James Bible has stood its ground for nearly 400 years. However, during that time the English language has changed, and with it the meanings of some words it used. Here are more than 6,500 words whose definitions have changed since 1611.Wikipedia
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