booster seat
US /ˈbuː.stər ˌsiːt/
UK /ˈbuː.stər ˌsiːt/
1.
a seat that is placed on an ordinary chair to make a child high enough to sit comfortably at a table, or a seat for a child in a car that raises them to the correct height for the seatbelt
:
•
We need to buy a new booster seat for our growing child.
•
Always make sure the booster seat is properly installed in the car.