1
- an external angle of a wall or building（墙或房屋的）外角, 外墙角：
1.1
- （亦作quoin stone）any of the stones or bricks forming such an angle; a cornerstone隅石块, 墙角石, 墙角砖; 基石。
2
- Printing a wedge or expanding mechanical device used for locking a letterpress forme into a chase【印刷】版楔, 紧版小楔子。
3
- a wedge for raising the level of a gun barrel or for keeping it from rolling枪楔, 枪管楔子。
with obj.
1
- provide (a wall) with quoins or corners给（墙）置隅石块, 使（墙）有内角。
2
- Printing lock up (a forme) with a quoin【印刷】用楔子固定（印版）。
词源
Middle English: variant of COIN, used earlier in the sense 'cornerstone' and 'wedge'.