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roller coaster

roller coaster

 
pronunciation:
ro lr ko str
part of speech: noun
definition: A roller coaster is something you ride on for fun. It is a small train that goes up and down on a winding track, and it often goes very fast. You can usually find a roller coaster at a fair or at a special place called an amusement park.
I love to go on the roller coaster at the fair, but my brother is too scared to ride it.