a silver coin of the united states containing 371.25 grains of silver and 41.25 grains of alloy, that is, having a total weight of 412.5 grains.-a gold coin of the united states containing 23.22 grains of gold and 2.58 grains of alloy, that is, having a total weight of 25.8 grains, nine-tenths fine. it is no longer coined.-a coin of the same general weight and value, though differing slightly in different countries, current in mexico, canada, parts of south america, also in spain, and several other european countries.-the value of a dollar; the unit commonly employed in the united states in reckoning money values.