› something such as an import tax or a limit on the amount of goods that can be imported that makes international trade more difficult or expensive: trade barriers on/to sth Trade barriers on leather handbags are usually limited to high tariffs. The rich countries have erected trade barriers.break/knock/tear down trade barriers We are calling on other nations to knock down trade barriers.reduce/end/lift trade barriers The talks aim to get rich countries to lower trade barriers. foreign/global/international trade barriers falling/high/low trade barriers