trailtrailtrailstrailedtrailing2verb (trails, trailing, trailed)to pull something along behind you; to be pulled along behind somebody or something: Her skirt was too long and it trailed along the ground.trailtrailtrails1noun1a line of marks that show which way a person or thing has gone: There was a trail of blood across the floor.2a path in the country: We followed the trail through the forest.