The meaning of INDOOR is of or relating to the interior of a building. How to use indoor in a sentence.

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(Definition of indoor from the Cambridge Academic Content Dictionary © Cambridge University Press)

Define indoor. indoor synonyms, indoor pronunciation, indoor translation, English dictionary definition of indoor. adj. 1. Of, situated in, or intended for use in the interior of a building: an indoor pool; indoor …

indoor in American English (ˈɪnˌdɔr, -ˌdour) adjective occurring, used, etc., in a house or building, rather than out of doors

Jan 18, 2026 · Adjective indoor (not comparable) Situated in, or designed to be used in, or carried on within, the interior of a building. Antonym: outdoor These fireworks are not for indoor use!

Indoor refers to anything that is located, used, done, or happening inside a building or structure. It encompasses everything from activities, sports, and events to items and structures specifically …