rollercoaster

noun
UK /ˈrəʊləkəʊstə/
US /ˈroʊlərkoʊstər/

A rollercoaster is a fast ride at a fun park that goes up and down and around.

The kids screamed with joy on the rollercoaster.


OTHER MEANINGS

2. A situation that keeps changing between good and bad.

Her emotions were a rollercoaster all week.

3. A journey or experience full of sudden changes.

The stock market has been a rollercoaster this year.

4. A railway with steep slopes and sharp turns.

The old rollercoaster track wound through the hills.