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

It's also set to open an outdoor amphitheater this December, along with a new Innovation Hall next January. — Renee Anderson, CBS News, 21 Oct. 2026

Farmworkers, other outdoor workers, older adults and low-income renters without air conditioning also face higher risk. — Sean MacAday, Sacbee.com, 21 Oct. 2026

More tangible amenities, like outdoor showers and plenty of lounging areas (every suite comes with a retractable floor-to-ceiling window that leads to a patio, for example), ramp up the luxury quotient. — Condé Nast, Condé Nast Traveler, 21 Oct. 2026

The tank is an outdoor tank by a company that provides industrial services, Kapszukiewicz said. — Rebekah Riess, CNN Money, 21 Oct. 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