open-air

UK: ˌəʊpənˈeə | US: ˌoʊpənˈer

Definition
  1. adj. located in or taking place outdoors; not enclosed

  2. adj. characterized by exposure to fresh air

Structure
open <not closed>air <atmosphere>
Etymology

The compound "open-air" combines "open," from Old English open (unfastened, uncovered), and "air," from Old French air (atmosphere), ultimately from Latin aer (air). The term emerged in the 17th century to describe spaces or activities unrestricted by walls or roofs, emphasizing freedom and natural exposure. Its logic reflects a literal contrast to enclosed environments.

Examples
  1. The concert was held in an open-air amphitheater under the stars.

  2. She prefers open-air markets for their vibrant atmosphere.

  3. The café offers open-air seating with a view of the river.

  4. Open-air classrooms became popular during the pandemic.

  5. They enjoyed an open-air picnic in the countryside.