coaster

[kəʊ.stə(ɹ)]

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A coaster is a flat piece of material used to protect surfaces from water marks or spills.

You might have coasters at home for your coffee table or dining table. They're usually made of plastic, wood, or cork and come in different shapes and designs. When you put them under a cup or glass, they catch any liquid that might spill over the edge so it doesn't leave a stain on the surface underneath. This way, your furniture stays clean and looks nice for longer.

How common is "coaster"?

Word coaster is considered uncommon in modern English.
It has a balanced usage among all categories: speech, fiction, newspapers and academic texts.

Definitions

noun

Agent noun of coast: one who coasts.
Something that coasts, such as a sled or toboggan.
A merchant vessel that stays in coastal waters.
A sailor who travels only in coastal waters.
A person who originates from or inhabits a coastal area.
A small piece of material used to protect the surface of a table, upon which one places cups or mugs.
A small tray on wheels, used to pass something around a table.
A worthless compact disc or DVD, such as one that was burned incorrectly.
A rollercoaster.
(Lake Superior) A coaster trout (brook trout, Salvelinus fontinalis)
A prostitute, especially a white woman, plying her trade in Chinese port towns.