noun 1.an alloy used in coinage, consisting of gold or silver with a larger amount of base metal.
2.an alloy of silver with copper or the like, used for coins of small denomination.
3.any coin struck from such an alloy.
Origin: 1720–30; <
French: debased metal, orig. ingot, equivalent to
Middle French bille log (see
billet2) +
-on noun suffix