open-air

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌopen-ˈair adjective [usually before noun]  OUT/OUTSIDEhappening or existing outdoors 户外的，露天的 SYN outdoor open-air concerts 露天音乐会 an open-air swimming pool 室外游泳池

Examples from the Corpus

open-air• Indoor pools exist, and Moscow boasts a year-round, heated open-air affair between the Kremlin and the Defence Ministry.• We had lunch at an open-air cafe in the city square.• In summer there are open-air concerts and theatre performances in the park.• The Mayrhofen Brass Band gives regular open-air concerts in fine weather.• There's a big open-air market there on Saturdays.• an open-air market• Marchers were due to congregate at Market Square for an open-air meeting.• Six miles away, at the open-air Minack Theatre, plays are performed with the sea as a backdrop.• Opera fans come from all over the country to see open-air performances in a unique setting.• There is a small cosy bar with open-air tables.• From here it appears to be not the central generating plant of ministerial power but some vast open-air theatre.

ˌopen-ˈair adjectiveChineseSyllable  

existing or Corpus happening outdoors

open-air
ˌopen-ˈair adjective [usually before noun]
happening or existing outdoors
   SYN  outdoor:
    open-air concerts
    an open-air swimming pool

open-airBrE /ˌəʊpən ˈeə(r)/ 🔊NAmE /ˌoʊpən ˈer/ 🔊 adjective [only before noun] happening or existing outside rather than inside a building 户外的；露天的◆an open-air swimming pool露天游泳池