A country's separate market which deals in goods and currencies outside the country's normal official government controls.

A secondary currency market where currency rates are different from those applied in the official market. The term may sometimes also apply to the black market.

An unofficial foreign exchange market tolerated by a government but not officially sanctioned. The exact boundary between a parallel market and a black market is not very clear, but official tolerance of what would otherwise be a black market leads a to use of the term parallel market.