Indoor
Adjective
UK
/ˌɪnˈdɔːr/
US
/ˌɪnˈdɔːr/
Definition
Happening or used inside a building.
Example
"We stayed indoors today."
"Indoor plants grow well in sunlight that comes through windows."
"Indoor sports, like badminton or table tennis, are played inside buildings."
Explanation
Indoor used to describe something that happens inside or is meant for inside. For example, the children played indoor games because it was raining. It’s an adjective and describes the type of activity, sports, place, or object, like indoor swimming pools, indoor classrooms, or indoor meetings. People use “indoor” to show that something happens inside, not outside in open air.