Question

what is a" trade barrier "

Answer 1

Trade barriers are government-induced restrictions on international trade.
Or
A barrier to trade is a government-imposed restraint on the flow of international goods or services. 

Answer 2

Answer:

The barrier imposed by government to regulate the foreign trade and also to decided that what kind of goods and also in how much quantity of each good , should come in there country , is called trade Barrier .

or

Barrier on foreign trade and foreign investment is called trade barrier .

hope it will help you !