柯林斯詞典rudder /?r?d?/ (rudders) 1. N-COUNT 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. 舵2. N-COUNT 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. (飛機的) 方向舵 返回 rudder劍橋詞典a flat piece of wood or metal at the back of a boat or aircraft , moved from side to side in order to control the direction of travel 舵；方向舵 返回 rudder