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roller coasteror roll·er·coast·er (rōl′ər-kō′stər)
1. A steep, sharply curving elevated railway with small open passenger cars that is operated at high speeds as a ride, especially in an amusement park.
2. An action, event, or experience marked by abrupt, extreme changes in circumstance, quality, or behavior: "the demographic roller coaster caused by the baby boom" (American Demographics).
1. a small railroad, esp. in an amusement park, having a train with open cars that moves along a high, sharply winding trestle built with steep inclines.
2. any phenomenon, period, or experience characterized by violent ups and downs or fluctuations.
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|Noun||1.||roller coaster - anything characterized by abrupt and extreme changes (especially up and down); "the economy has been on a roller coaster all year"|
|2.||roller coaster - elevated railway in an amusement park (usually with sharp curves and steep inclines)|
elevated, elevated railroad, elevated railway, overhead railway, el - a railway that is powered by electricity and that runs on a track that is raised above the street level
hypercoaster - a roller coaster that goes up 200 feet or higher and can catapult riders from 0 to 70 mph in 4 seconds by motors originally designed to launch rockets
ride - a mechanical device that you ride for amusement or excitement