Noun:

মুক্ত বায়ু,

open air's Usage Examples:

spin-off Przystanek Woodstock in 2014 drew 750,000 thus becoming the largest open air annual festival in Europe and the second largest in the world.

An open-air museum (or open air museum) is a museum that exhibits collections of buildings and artifacts out-of-doors.

open air swimming pools of Britain.

Liquid assets: the lidos and open air.

In milder climates, markets are often open air.

Hampton Pool is a heated open air pool or lido in Hampton in the London Borough of Richmond upon Thames.

Synonyms:

reopen; lever; jimmy; unbolt; uncork; pry; lance; prize; break open; gap; open up; breach; unlock; prise; unseal; click open; unbar;

Antonyms:

seal; lock; bolt; cork; bar; close;