n. A commercial term in use, principally on the continent of Europe, to denote—n. The rate of exchange between the currencies of two countries, as between those of Italy and the United States.n. The percentage of difference in the value of two metallic currencies, or a metallic and a paper currency of the same denomination, in the same country; hence, premium on the appreciated currency, and disagio, or discount, on the depreciated one.n. An allowance made in some places for the wear and tear of coins, as in Amsterdam, Hamburg, etc.