of, situated in, or appropriate to the inside of a house or other building: an indoor tennis court, indoor amusements
WordReference Random House Learner's Dictionary of American English © 2025
in•door /ˈɪnˌdɔr/USA pronunciation
adj.
WordReference Random House Unabridged Dictionary of American English © 2025- located, used, or existing inside a building:indoor plumbing.
in•door
(in′dôr′, -dōr′),USA pronunciation adj.
- occurring, used, etc., in a house or building, rather than out of doors:indoor games.
- aphetic variant of within-door, origin, originally phrase within (the) door, i.e., inside the house 1705–15
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