名詞 coaster:

1. a resident of a coastal area
2. someone who coasts
3. a covering (plate or mat) that protects the surface of a table (i.e., from the condensation on a cold glass or bottle)

coast.er

n.（名詞）
One that coasts, as:
沿海航行者，例如：
One who acts in an aimless manner.
無目的地行動者
A sled or toboggan.
平底橇：一個雪橇或平底雪橇
One who rides a sled or toboggan.
乘雪橇的人：一個乘雪橇或平底雪橇的人
Nautical A vessel engaged in coastal trade:
【航?！?/i> 沿海貿(mào)易船：從事沿海貿(mào)易的船：
例句：
.dirty British coaster with a salt-caked smokestack.(John Masefield)
.骯臟的英國沿海航船，有鹽餅狀的大煙囪.(約翰·梅斯菲爾德)

A roller coaster.
翻滾過山車

A disk, plate, or small mat placed under a bottle, pitcher, or drinking glass to protect a table top or other surface beneath.
杯墊：放在瓶子、水罐或酒杯下的圓盤、盤子或小襯墊，用以保護(hù)桌面或下面的其它平面
A small tray, often on wheels, for passing something, such as a wine decanter, around a table.
放酒瓶的銀盤：餐桌上通常帶輪的托盤，用于傳遞某物，如酒瓶
A resident of a coastal region.
沿海居民