/ˈel pleɪt ||; ˈɛl plet/noun [C] a sign with a large red letter L (for ‘learner’) on it, that you fix to a car to show that the driver is learning to drive L字牌（上面有红色L字母的牌子，置于车辆的前后，以表示驾驶者在学习驾驶。L即learner）