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English definition of “indoor”

indoor

adjective [before noun]     /ˌɪnˈdɔːr/ US  /-ˈdɔːr/
A2 happening, used, or existing inside a building: indoor sports/activities an indoor racetrack/swimming pool → Opposite outdoorIn and at
(Definition of indoor adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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