Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “roller coaster”

See all translations

roller coaster

noun uk   us  
[C] an exciting entertainment in an amusement park, like a fast train that goes up and down very steep slopes and around very sudden bends [S] a situation which changes from one extreme to another, or in which a person's feelings change from one extreme to another: He was on an emotional roller coaster for a while when he lost his job.
(Definition of roller coaster from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of roller coaster?
Add Cambridge dictionaries to your browser to your website

Definitions of “roller coaster” in other dictionaries

Word of the Day

hard luck story

a story or piece of information that someone tells you or writes about himself or herself, intended to make you feel feel sympathy for that person

Word of the Day

A certain je ne sais quoi: French words and phrases used in English

by Liz Walter,
January 21, 2015
It is an odd irony that the more sophisticated your use of English is, the more likely you are to use French words and phrases. Or, to be more accurate, ones you know to be French – words such as ballet, au pair, abattoir, fiancé, café, and restaurant are so entrenched in

Read More 

micro pig noun

January 26, 2015
an extremely small pig, bred to be a pet Micro pigs have become popular pets recently, with famous owners including Victoria Beckham, Paris Hilton and Olympic diver, Tom Daley.

Read More