Definition of “roller coaster” - English Dictionary

british dictionary

(Definition of “roller coaster” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“roller coaster” in American English

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roller coasternoun [ C ]

us /ˈroʊ·lər ˌkoʊ·stər/ plural roller coasters

a small railroad, esp. in an amusement park, with open cars that travel quickly along a steep, curved track that goes up and down over and over

A roller coaster is also a feeling, situation, or experience that changes very quickly:

an emotional roller coaster

(Definition of “roller coaster” from the Cambridge Academic Content Dictionary © Cambridge University Press)

“roller coaster” in Business English

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roller coasternoun [ S ]

uk us

a situation in which prices, rates, etc. keep going up and down by large amounts very quickly:

Last week the roller coaster of crude oil prices climbed to $89.47 on Thursday and $90 on Friday.
Mortgage chaos sent the stock market on a roller coaster ride.

(Definition of “roller coaster” from the Cambridge Business English Dictionary © Cambridge University Press)