the.com/pushchair

means A collapsible wheeled chair for pushing a young child around, typically lighter and more upright than a full pram.

from Straightforward British compound word: 'push' plus 'chair', naming the thing exactly as you use it. It emerged as a plainer, foldable alternative to the heavier Victorian-style 'perambulator' (pram), with the term gaining ground in the UK through the 20th century as lighter, buggy-style designs became common — American English mostly calls the same object a 'stroller'.