trade route
From Longman Dictionary of Contemporary EnglishRelated topics: Trade, Geographytrade routeˈtrade route noun [countable] BBTSGa way across land or sea used by traders in the past ancient trade routes between Europe and AsiaExamples from the Corpustrade route• The king's highway, an important trade route, ran down the eastern plateau.• We will see how the mummies occupied the midpoint of the most important overland trade route in Eurasian history.