A supermini is a small car that is bigger than a city car but smaller than a compact car.
Superminis are often seen as practical and economical cars, good for city driving.
Examples:
My mom drives a supermini.
I want to buy a supermini for my first car.
The supermini is easy to park in the city.
The supermini is so small, it's like a toy car!
In the future, everyone will drive superminis.
I saw a supermini with a super big spoiler on the back!