coin(redirected from paying back in their own coin)
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cointhe metallic CURRENCY that forms part of a country's MONEY SUPPLY.Various metals have been used for coinage purposes. Formerly, gold and silver were commonly used but these have now been replaced in most countries by copper, brass and nickel. Coins in the main constitute the ‘low value’ part of the money supply See MINT, LEGAL TENDER.
Collins Dictionary of Economics, 4th ed. © C. Pass, B. Lowes, L. Davies 2005