柯林斯詞典coaster /?k??st?/ (coasters) 1. N-COUNT A coaster is a small mat that you put underneath a glass or cup to protect the surface of a table. 盃墊2. →see also roller coaster 返回 coaster劍橋詞典 coaster noun [C] (OBJECT) a small piece of wood , plastic , or other material that you put a glass or cup on to protect a surface from heat or liquid 盃墊 coaster noun [C] (BOAT) a ship that sails between ports along a coast （航行於沿海港口間的）船衹 返回 coaster