Money of a country other than one's own. A currency printed in a different country. Generally speaking, a foreign currency may not be used to buy goods and services in any country other that the one in which it is printed, unless the government of that country agrees to use it.oney of a country other than one's own. A currency printed in a different country. Generally speaking, a foreign currency may not be used to buy goods and services in any country other that the one in which it is printed, unless the government of that country agrees to use it.