an external angle of a wall or building

smaller stations followed the same pattern; stone-built, with strongly accented quoins

a wedge or expanding mechanical device used for locking a letterpress forme into a chase

a wedge for raising the level of a gun barrel or for keeping it from rolling

provide (a wall) with quoins or corners

the white plaster walls quoined with red sandstone blocks

lock up (a forme) with a quoin