hard currency is a noun meaning "a currency that is not likely to depreciate suddenly in value". It carries 2 recorded senses.
a currency that is not likely to depreciate suddenly in value
“the countries agreed to conduct their bilateral trade in hard currency, replacing previous barter arrangements”
“Germany once had a solid economy, good fiscal and monetary policies, and a hard currency”
Definitions, synonyms and semantic relations for hard currency come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.