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

Let nature star in your indoor seasonal displays with these creative ideas for bulbs for winter flowers. —Miranda Crowell, Better Homes & Gardens, 11 Feb. 2026

Pour equal parts water and Pine-Sol in a spray bottle to spritz on outdoor furniture, the deck, and indoor areas where flies are most likely to flock, such as kitchen countertops. —Lauren Wicks, Southern Living, 11 Feb. 2026

Mold and indoor allergies are around any time of the year. —Nicole Villalpando, Austin American Statesman, 11 Feb. 2026

The resort will also open a 50,000-square-foot Nordic-style indoor/outdoor spa in summer 2022. —Condé Nast, Condé Nast Traveler, 11 Feb. 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