01 n. Originally, a solid exterior angle, as of a building; now, commonly, one of the selected pieces of material by which the corner is marked.
-
1.
Originally, a solid exterior angle, as of a building; now, commonly, one of the selected pieces of material by which the corner is marked.(Arch.)
-
2.
A wedgelike piece of stone, wood, metal, or other material, used for various purposes;(Masonry)
Phrases & compounds
Hollow quoin —
See under Hollow.
Quoin post —
the post of a lock gate which abuts against the wall.