1 N-COUNT (船的)舵，方向舵 A rudder is a device for steering a boat. It consists of a vertical piece of wood or metal at the back of the boat. (船的)舵，方向舵

2 N-COUNT (飞机的)舵，方向舵 An aeroplane's rudder is a vertical piece of metal at the back which is used to make the plane turn to the right or to the left. (飞机的)舵，方向舵