IPA: /ˈaʊtsaɪd/
KK: /ˈaʊtsaɪd/
Relating to or situated on the outer part or surface of something; not inside.
The outside of the building was painted a bright color.
In a position or location that is not inside; in the open air or external area.
The children played outside in the sunshine.
The area or space that is beyond a boundary or limit, often referring to the external part of something.
The children love to play outside in the fresh air.
In a position or location that is beyond the inner limits of something, often referring to the area that is not enclosed or is external to a particular space.
The children played outside in the yard.
Outside → It is formed from "out-" (meaning out or away) and "side" (from Old English "side", meaning a position or surface). The word "outside" refers to the area that is out or away from a particular boundary or surface.
Think of being 'out' ('out-') from a 'surface' or 'position' ('side') — that's why outside means the area away from a boundary.