indoor

adjective

/ˈɪndɔː(r)/

/ˈɪndɔːr/

[only before noun]

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located, done or used inside a building（在）室内的；在户内进行的；在室内用的
- an indoor swimming pool室内游泳池
- indoor games室内游戏
- Poor indoor air quality can result in increased risk of asthma and allergies.室内空气质量差会导致哮喘和过敏的风险增加。
opposite outdoorTopics Houses and homesb1, Buildingsb1
Oxford Collocations Dictionary
Indoor is used with these nouns:
arena
athletics
court
…
See full entry
relating to sports played indoors室内：与室内运动有关
- the world indoor 200 metres champion室内 200 米赛世界冠军

Word Originearly 18th cent. (superseding earlier within-door): from in (as a preposition) + door. Compare with indoors.