a small vehicle with four wheels in which a baby or child is pushed around
"The mother pushed her infant in the stroller down the quiet sidewalk."
A seat or chair on wheels, pushed by somebody walking behind it, typically used for transporting babies and young children.
"The mother carefully navigated the crowded park path while pushing her baby in a lightweight stroller."
In plain English: A stroller is a small cart with wheels that parents use to push their babies around easily.
"She pushed her baby in the stroller down the sidewalk."
Usage: In American English, "stroller" refers to a baby carriage, whereas British speakers typically use the term "pram." Avoid using "stroller" as a verb; instead, say someone is "pushing a stroller."
The word stroller is a straightforward compound formed by adding the suffix -er to the verb stroll. It was first used to describe someone who goes for leisurely walks, directly reflecting its modern meaning of a person or device designed for slow movement.