franc

noun

1. the former basic monetary unit of Belgium, France, and Luxembourg, superseded in 2002 by the euro
2. the basic monetary unit of:
   1. Democratic Republic of the Congo
   2. Liechtenstein
   3. Switzerland
3. any of the basic monetary units of various countries formerly ruled by France or Belgium, as Benin, Burundi, Chad, Gabon, Niger, and the Republic of the Congo