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English definition of “coaster”

coaster

noun [C] uk   /ˈkəʊ.stər/ us    /ˈkoʊ.stɚ/

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 liquidDishes, bowls, cups and glasses

coaster noun [C] (BOAT)

a ship that sails between ports along a coastPassenger, cargo and military shipsBoats and sailing craft
(Definition of coaster from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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