indoor

adjective

in·​door ˈin-ˈdȯr 

1

: of or relating to the interior of a building

2

: living, located, or carried on within a building

an indoor sport

Examples of indoor in a Sentence

Recent Examples on the Web

Aside from pets, keep the trees away from cold drafts, radiators and forced-air heating vents, since temperature changes and dry indoor air will cause stress and leaf drop. — ABC News, 3 Nov. 2026

Palace Wellness is similarly substantial, with a 25-metre indoor infinity pool and a heated outdoor pool overlooking the lake and mountains. — Fergus Scholes, TheWeek, 3 Nov. 2026

These doormats are significantly heavier than indoor designs as well. — Bestreviews, Chicago Tribune, 3 Nov. 2026

For a more slipper-like look, Toteme’s velvet flats stay true to the classics, while mules from Dôen and Staud could easily double as your favorite indoor-outdoor shoes. — Laura Jackson, Vogue, 2 Nov. 2026

Word History

First Known Use

1711, in the meaning defined at sense 1

Phrases Containing indoor

• indoor plumbing

Rhymes for indoor

• abhor
• abor
• adore
• afore
• ardour
• ashore
• backdoor
• before
• bookstore
• candour
• centaur
• claymore

Kids Definition

indoor

adjective

in·​door ˌin-ˌdō(ə)r 

-ˌdȯ(ə)r

1

: of or relating to the interior of a building

2

: done, living, used, or belonging within a building

an indoor sport