Definition

Relating to activities or things that happen inside a building rather than outside.

Example

We decided to have an indoor picnic because it was raining outside.

Conversation

Do you want to have an indoor movie night this weekend?

That sounds great! I love cozy movie nights.

We can make some popcorn and pick a few good films.

Perfect! I’ll bring my favorite snacks for the indoor fun.

Synonyms & Antonyms

Root Explanation

Indoor → It is formed from "in-" (meaning within) and "door" (from Old English "duru", meaning a barrier or entrance). The word "indoor" refers to being within a barrier or entrance, typically inside a building.

Memory Tip

Think of being 'within' ('in-') a 'door' — that's why indoor means being inside.

Visually Confused Words