plaque/plæk; plɑːk/ n 1 [C] a piece of flat metal or stone on a wall with writing on it that reminds people of a famous person or event that is connected with that place 〔纪念名人或事件的〕匾，饰板: The plaque read: Samuel Johnson was born here. 牌匾上写着: 塞缪尔·约翰逊出生于此地。 2 [U] a harmful substance that forms on your teeth 牙斑