Noun:

1. expandable metal or wooden wedge used by printers to lock up a form within a chase

2. the keystone of an arch

coignen.隅石

quoinn.隅角；拱顶石；[印刷术] 版楔vt.以楔子固定或提高

1. People stood at every coign of vantage on both sides of the road to watch the gala parade.
   人们站在大路两边每个便于观看的地点来观看节日游行。