stroller

Short definition from Wiktionary

Noun

1. 1
   A seat or chair on wheels, pushed by somebody walking behind it, typically used for transporting babies and young children.
2. 2
   One who strolls.
3. 3
   A vagrant.
4. 4
   Men's semiformal daytime dress comprising a grey or black single- or double-breasted coat, grey striped or checked formal trousers, a grey or silver necktie, and a grey, black or buff waistcoat.