coaster

US /ˈkoʊ.stɚ/
UK /ˈkoʊ.stɚ/
"coaster" picture
1.

a small mat or disk placed under a glass or cup to protect a surface from moisture or heat

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Please use a coaster to protect the table.
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The wooden coaster had an intricate design.
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matpadtrivet
2.

a small sled or toboggan

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The children rode their coasters down the snowy hill.
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He pulled the coaster back up the hill for another ride.
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sledtoboggan
3.

a ship or boat that sails along the coast, especially one used for trade

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The small coaster transported goods between coastal towns.
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They watched the coaster disappear over the horizon.
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coastal vesselcabotage vessel
4.

a roller coaster

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The new amusement park has an amazing coaster.
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She screamed with excitement on the fastest coaster.
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roller coaster
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roller coaster