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
Plush, fuzzy styles such as the Snug Leaves Fuzzy Scuff slippers and NineCiFun Slip-ons wrap your feet in cloud-like comfort, while indoor/outdoor options like the Cushionaire Ollie Suede Moccasins and Kubua booties offer extra support and durability.
—
Amber Love Bond, Travel + Leisure, 14 Jan. 2026
Throughout the house, direct access to a concrete wraparound patio blends indoor and outdoor living.
—Sandra Barrera, Oc Register, 14 Jan. 2026
If your home naturally receives plenty of sun, your indoor plants may be perfectly fine.
—Lauren Landers, Better Homes & Gardens, 14 Jan. 2026
Travel and Leisure readers previously ranked Changi Airport in Singapore, with the world's largest indoor waterfall and hundreds of thousands of plants, as one of their favorites.
—Marina Watts, PEOPLE, 14 Jan. 2026
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Cite this Entry
“Indoor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/indoor. Accessed 19 Jan. 2026.
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
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