noun, noun which may take the genitive case particle 'no'
Refers to being outside, uncovered, or exposed to the sky. Often used attributively with の to modify nouns.
露天風呂に入るのが好きです。
I like bathing in an open-air hot spring.
露天の市場で新鮮な野菜を買った。
I bought fresh vegetables at the open-air market.