- located, done or used inside a building
- an indoor swimming pool
- indoor games
- Poor indoor air quality can result in increased risk of asthma and allergies.
Oxford Collocations DictionaryIndoor is used with these nouns:- arena
- athletics
- court
- …
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- relating to sports played indoors
- the world indoor 200 metres champion
Word Originearly 18th cent. (superseding earlier within-door): from in (as a preposition) + door. Compare with indoors.
Check pronunciation:
indoor