Definition of "quoin" in English

noun

1. Any of the corner building blocks of a building, usually larger or more ornate than the surrounding blocks.

2. The keystone of an arch.

3. (printing, historical) 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.

4. (obsolete, nautical) A form of wedge used to prevent casks from moving.

5. (firearms) A wedge of wood or iron put under the breech of heavy guns or the muzzle of siege-mortars to raise them to the proper level.

6. (horticulture) A number of apple varieties with a distinctive ribbed appearance, like corners of a coin.

verb

1. (transitive) To wedge or steady with quoins.