tailwind /ˈteɪlwɪnd/noun 2verb 1forms 3 noun2 •A wind that blows in the same direction as the course taken by an aircraft, sailing ship, bird, etc.; a following wind. •(figurative) A force that accelerates progress. verb1 •Of a wind, to blow on a windmill or wind turbine in such a way that wind pressure is exerted on the wrong side of the sail or turbine assembly. formstailwinded · tailwinding · tailwinds