a quoin; a corner or external angle; a wedge. see coigne, and quoin.-a piece of metal on which certain characters are stamped by government authority, making it legally current as money; -- much used in a collective sense.-that which serves for payment or recompense.-to make of a definite fineness, and convert into coins, as a mass of metal; to mint; to manufacture; as, to coin silver dollars; to coin a medal.-to make or fabricate; to invent; to originate; as, to coin a word.-to acquire rapidly, as money; to make.-to manufacture counterfeit money.