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RELATED WORDS : active air defense air air alert air attache air attack air bag air base air bed air bladder air brake air brush air bubble air built air castle air cell air chamber air cleaner air cock air combat command air compressor air condition air conditioner air conditioning air cooling air corps air cover air crew air current air cushion air defense air division air drill air duct air embolism air engine air express air filter air flow air force air force academy air force intelligence surveillance and reconnaiss air force isr air force officer air force research laboratory air force space command air gap air gas air group air gun air hammer air hole air horn air hose air hostess air jacket air lane air letter air level air line air lock air mail air marshal air mass air mattress air medal air mile air national guard air out air passage air pipe air plant air pocket air poise air pollution air potato air power air pressure air pump air raid air reconnaissance air rifle air sac air search radar air shaft air sick air sickness air sock air space air speed air spring air station air stove air terminal air thermometer air traffic air transport air transportation air transportation system air travel air traveler air traveller air unit air vessel air wave air well blue air break open breath of fresh air calm air castle in the air clear the air click open compressed air current of air dead air drop open fall open flow of air fly open hold open hole in the air hot air in the air industrial air pollution keep one's eyes open keep open light air liquid air naval air warfare center weapons division on air open open account open and aboveboard open chain open circuit open classroom school open door open eyed open fire open fireplace open forum open fracture open frame open house open interval open letter open market open marriage open minded open order open primary open sandwich open sea open secret open sesame open shop open sight open society open to open to question open university open up open verdict open weave out in the open out of thin air passive air defense puff of air royal air force special air service take the air thin air u. s. air force united states air force united states air force academy up in the air us air force us air force academy walk on air walking on air wide open wide open spaces with open arms

WORDNET DICTIONARY

Noun open air has 1 sense

• open air(n = noun.location) open, out-of-doors, outdoors - where the air is unconfined; "he wanted to get outdoors a little"; "the concert was held in the open air"; "camping in the open"
is a kind of exterior, outside

THESAURUS

open air

aerial, aeriform, aery, airish, airlike, airy, alfresco, atmospheric, breezy, ethereal, exposed, light, open, out, out-of-door, out-of-doors, outdoor, outside, pneumatic, roomy, tropospheric, without

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open air

Air

N air, common air, atmospheric air, atmosphere, aerosphere, open air, sky, welkin, blue sky, cloud, weather, climate, rise and fall of the barometer, isobar, aerology, aerometry, aeroscopy, aeroscopy, aerography, meteorology, climatology, pneumatics, eudioscope, baroscope, aeroscope, eudiometer, barometer, aerometer, aneroid, baroscope, weather gauge, weather glass, weather cock, exposure to the air, exposure to the weather, ventilation, aerostation, aeronautics, aeronaut, containing air, flatulent, effervescent, windy, atmospheric, airy, aerial, aeriform, meteorological, weatherwise, in the open air, a la belle etoile, al fresco, sub jove dio.

For further exploring for "open air" in Webster Dictionary Online