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

INDOOR meaning: 1. happening, used, or existing inside a building: 2. happening, used, or existing inside a…. Learn more.

Indoor environment, in building science, traditionally includes the study of indoor thermal environment, indoor acoustic environment, indoor light environment, and indoor air quality

INDOOR definition: occurring, used, etc., in a house or building, rather than out of doors. See examples of indoor used in a sentence.

What is the difference between indoors and indoor? Indoors is an adverb. If you go indoors, you go into a building. It started to rain, so we went indoors. If something happens indoors, it happens inside a …

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 …

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

Synonyms for INDOOR: internal, interior, inner, inside, inward, innermost, inmost; Antonyms of INDOOR: outdoor, open-air, out-of-door, external, outdoorsy, outside, outer, alfresco