Stroller (noun)

1. A person who takes a leisurely walk.
2. A small vehicle with four wheels and a handle, in which a baby or young child can be pushed along.
3. A person who is wandering around aimlessly.

Origin:

Early 17th century: from stroll + -er.

Examples:

1. The park was full of strollers on a sunny day.
2. She was pushing a stroller with her baby in it.
3. He was a stroller in the mall, looking for something to buy.
4. They were strolling along the beach.
5. She was a frequent stroller in the park.