roller coaster

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roller coaster /ˈroʊlɚˌkoʊstɚ/ noun
plural roller coasters
roller coaster
/ˈroʊlɚˌkoʊstɚ/
noun
plural roller coasters
Learner's definition of ROLLER COASTER
[count]
: a ride at an amusement park which is like a small, open train with tracks that are high off the ground and that have sharp curves and steep hills
: a situation or experience that involves sudden and extreme changes
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