Indoor means something is inside a building or covered place. It is not outside. People do many activities indoors to stay safe from weather.
We play indoor games when it rains.
The indoor pool is warm and clean.
Indoor describes sports or games played inside a building, not outside. Examples include indoor soccer, badminton, or climbing.
Indoor soccer is popular in winter.
She joined an indoor climbing club.
Indoor as a noun sometimes means an indoor place or area, mostly informal. It means the inside space used for events or activities.
The indoor was too small for the concert.
We met at the indoor for lunch.
Indoor describes plants or gardening done inside buildings, often because outdoor weather is bad or space is limited.
Indoor plants need little sunlight.
She loves indoor gardening at home.
Indoor can describe environmental or physical conditions inside buildings, such as temperature, air, or light levels.
Indoor air quality affects health.
The indoor temperature is very stable.
Indoor can be used informally as an adverb meaning inside a building, often to contrast with being outside.
Let’s stay indoor because it is cold.
Indoor is warmer than outdoor now.
