Quoin meaning

koin, kwoin
A keystone.
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A wedge-shaped block used to lock type in a chase.
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A wedge used to raise the level of a gun.
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An exterior angle of a wall or other piece of masonry.
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Any of the stones used in forming such an angle, often being of large size and dressed or arranged so as to form a decorative contrast with the adjoining walls.
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To secure with a quoin.
verb
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To provide, secure, or raise with a quoin or quoins.
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The external corner of a building; esp., any of the large, squared stones by which the corner of a building is marked.
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A wedgelike piece of stone, etc., such as the keystone or one of the pieces of an arch.
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A wedge-shaped wooden or metal block used to lock up type in a galley or form, to keep casks from rolling, etc.
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To furnish with quoins, or corners.
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Any of the corner building blocks of a building, usually larger or more ornate than the surrounding blocks.
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The keystone of an arch.
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A metal wedge which fits into the space between the type and the edge of a chase, and is tightened to fix the metal type in place.
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Origin of quoin

Variant of coin; compare coign.