n. | 1. | A var. spelling of Coin, Quoin, a corner, wedge; - chiefly used in the phrase coign of vantage, a position advantageous for action or observation. |
2. | an expandable metal or wooden wedge used by printers to lock up a form within a chase. | |
3. | the keystone of an arch. |
Noun | 1. | ![]() |
2. | coign - the keystone of an arch |