IPA: /ˈpleɪɡraʊnd/
KK: /ˈpleɪˌɡraʊnd/
A place outside where children can play, often with swings, slides, and other fun equipment.
The children spent the afternoon playing at the playground.
Playground → It is formed from "play" (from Old English *plegian*, meaning to engage in activity for enjoyment) and "ground" (from Old English *grund*, meaning the surface of the earth). The word "playground" refers to a designated area on the ground where play and recreational activities occur.
Think of a place where you can 'engage in enjoyable activities' ('play') on the 'surface of the earth' ('ground') — that's what a playground is all about.