- rudder - a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes
--1 is a kind of airfoil, aerofoil, control surface, surface
--1 is a part of vertical tail- rudder - (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel
--2 is a kind of steering system, steering mechanism
--2 is a part of vessel, watercraft
--2 has parts: rudder blade; rudderpost, rudderstock; tiller - rudder - (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel