01 n. A var. spelling of Coin, Quoin, a corner, wedge; -- chiefly used in the phrase coign of vantage, a position advantageous for action or obse…
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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. See: Coin, Quoin“From some shielded nook or coign of vantage.” — The Century.“The lithosphere would be depressed on four faces; . . . the four projecting coigns would stand up as continents.” — Nature.
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2.
an expandable metal or wooden wedge used by printers to lock up a form within a chase.
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3.
the keystone of an arch.