Not redeemable for money in coin.adjective
Not able to be legally exchanged for another currency.
Not convertible; incapable of being converted into or exchanged for something else: as, one metal is inconvertible into another; inconvertible bonds (bonds that cannot be exchanged for others of a different tenor).adjective
Not convertible; not capable of being transmuted, changed into, or exchanged for, something elseadjective
not capable of being changed into something elseadjective
used especially of currencies; incapable of being exchanged for or replaced by another currency of equal value