from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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.
- n. 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).
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative spelling of rollercoaster.
from the GNU version of the Collaborative International Dictionary of English
- An amusement railroad of varying design in which open cars coast by gravity over a long winding track in a closed circuit, with steep pitches and ascents, and in some cases loops in which the cars are briefly upside-down; typically, the cars are pulled by a chain device to the top of the first peak, after which gravity and momentum provide the only propulsive forces. In some cases, the cars are suspended from a monorail rather than resting on a track, and such cars may be made to swing outward at an angle near to the horizontal. It is a popular amusement at many amusement parks, but is sufficiently frightening to some people that they refuse to ride in one.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. elevated railway in an amusement park (usually with sharp curves and steep inclines)
- n. anything characterized by abrupt and extreme changes (especially up and down)
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