n. & v.
--n.
1. an external angle of a building.
2 a stone or brick forming an angle; a cornerstone.
3 a wedge used for locking type in a forme.
4 a wedge for raising the level of a gun, keeping the barrel from rolling, etc.
--v.tr. secure or raise with quoins.
Derivatives:
quoining n.
Etymology: var. of COIN