From Longman Business Dictionarymost-favored nationmost-ˌfavored ˈnation abbreviation MFN American EnglishECONOMICS in international trade, a country that is given the same advantages, such as reduced import taxes and higher QUOTAs (=numbers of goods it is allowed to export), as the best ones given to other countries, putting it on the same level as these other countriesThe US will continue its most-favored nation treatment for imports of Chinese-made goods. → nation