outdoor

adjective

out·​door ˈau̇t-ˌdȯr 

ˈau̇t-ˈdȯr

variants or less commonly outdoors

ˈau̇t-ˌdȯrz, 

ˈau̇t-ˈdȯrz 

1

: of or relating to the outdoors

2

a

: performed outdoors

outdoor sports

b

: outdoorsy

an outdoor couple

3

: not enclosed : having no roof

an outdoor restaurant

Synonyms of outdoor

• open-air
• outside
• outer
• exterior
• out-of-door
• external
• outdoorsy

Examples of outdoor in a Sentence

an outdoor picnic is always at the mercy of the weather, of course

Recent Examples on the Web

By building arrays of outdoor telescopes that gather and focus that blue light, these Čerenkov telescopes can help us reconstruct the original direction and energy of these ultra-fast cosmic rays that strike and interact with Earth’s atmosphere. —Big Think, 30 Jan. 2026

Preventing kissing bugs involves sealing cracks, repairing screens, and keeping outdoor areas tidy to reduce hiding spots. —Jamie Cuccinelli, Martha Stewart, 30 Jan. 2026

Amazon’s outdoor furniture section is packed with discounts on everything from egg chairs to small-space-friendly fire pit tables. —Mariana Best, Better Homes & Gardens, 30 Jan. 2026

The zones will create space businesses can utilize for outdoor cafe seating, merchandise display racks and direct interaction with pedestrians. —Alex Driggars, Austin American Statesman, 30 Jan. 2026

Word History

Etymology

out (of) door, out (of) doors

First Known Use

1748, in the meaning defined at sense 1

Rhymes for outdoor

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

Kids Definition

outdoor

adjective

out·​door ˌau̇t-ˌdō(ə)r 

-ˌdȯ(ə)r

variants also outdoors

-ˌdō(ə)rz 

-ˌdȯ(ə)rz

1

: of or relating to the outdoors

an outdoor setting

2

: done outdoors

outdoor games

3

: having no roof and walls

an outdoor theater