Usually a curved member made up of separate wedge-shaped solids, with the joints between them disposed in the direction of the radii of the curve; used to support the wall or other weight above an opening. In this sense arches are segmental, round (i. e., semicircular), or pointed.
A flat arch is a member constructed of stones cut into wedges or other shapes so as to support each other without rising in a curve.
Any place covered by an arch; an archway; as, to pass into the arch of a bridge.
Any curvature in the form of an arch; as, the arch of the aorta.
To cover with an arch or arches.
To form or bend into the shape of an arch.
To form into an arch; to curve.
Chief; eminent; greatest; principal.
Cunning or sly; sportively mischievous; roguish; as, an arch look, word, lad.
You say to a brick, 'What do you want, brick?' And brick says to you, 'I like an arch.' And you say to brick, 'Look, I want one, too, but arches are expensive and I can use a concrete lintel.' And then you say: 'What do you think of that, brick?' Brick says: 'I like an arch.' Louis Kahn
A cigarette is a breathing space. It makes a parenthesis. The time of a cigarette is a parenthesis, and if it is shared, you are both in that parenthesis. It's like a proscenium arch for a dialogue. John Berger
The Romans were not inventors of the supporting arch, but its extended use in vaults and intersecting barrel shapes and domes is theirs. Harry Seidler