currency
//ˈkʌrənsi//
Noun
currencySingular
currenciesPlural
1
A system of money in general use in a particular country or region.
The euro is the official currency of many European countries.
2
The fact or quality of being generally accepted or in use; prevalence.
This theory has gained wide currency among scientists.
3
The time during which something is in use or valid.
The currency of this passport is five years.