indoor

American  

[in-dawr, -dohr] / ˈɪnˌdɔr, -ˌdoʊr /

adjective

1. occurring, used, etc., in a house or building, rather than out of doors.

   indoor games.

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indoor British  

/ ˈɪnˌdɔː /

adjective

1. of, situated in, or appropriate to the inside of a house or other building

   an indoor tennis court

   indoor amusements

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Etymology

Origin of indoor

1705–15; aphetic variant of within-door, originally phrase within ( the ) door, i.e., inside the house

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Explanation

Use the adjective indoor to describe something that happens or is used inside a building or house. Your indoor furniture is probably a little fancier than your plastic outdoor furniture. Indoor sports are the ones you play inside, like ping pong and floor hockey — beach volleyball is not an indoor sport. Your indoor voice is likewise the one you use in your house or classroom, a quieter voice than when you holler across a parking lot to your friend in his convertible. Indoor, which has been used since the 18th century, is a shortened form of the phrase within door.

Example Sentences

See Examples For:

indoor

Rana keeps her windows closed and curtains drawn, and has added more indoor plants.

From BBC ● Nov. 5, 2026

There are 21 bedrooms, 26.5 bathrooms, seven kitchens, offices, a library, and an indoor swimming pool.

From MarketWatch ● Nov. 4, 2026

This show set the record for the largest ever indoor rock concert attendance of 76,896, which would be broken by Led Zeppelin in the same place two years later.

From Salon ● Nov. 3, 2026

City officials said they chose the threshold because Los Angeles County sees more emergency room visits when indoor temperatures rise above 82 degrees.

From Los Angeles Times ● Oct. 30, 2026

It crossed my mind that Dad ought to sell Elvis and use the money to install an indoor toilet and buy us all new clothes.

From "The Glass Castle" by Jeannette Walls

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Related Words

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