ˌopen ˈmarket noun

1. on the open market goods that are bought and sold on the open market are sold publicly rather than privately:
The painting would fetch millions of dollars if it was sold on the open market.

2. [countable usually singular] a system which makes it easy to buy and sell goods with other countries, because there are few restrictions:
There is now an open market within the European Community.

[TahlilGaran] Dictionary of Contemporary English ▲

open market
n. phr. Goods or securities available for purchase by all.
The stocks of certain companies are on the open market.

[TahlilGaran] English Idioms Dictionary ▲