An open-air terrace; an outdoor terrace area often found at cafés or restaurants used for seating in the open air.
天気がいいのでオープンテラスでランチを食べよう。
Since the weather is nice, let's have lunch on the open-air terrace.
このカフェにはオープン・テラスがあって、犬連れでも入りやすい。
This café has an open terrace, so it's easy to enter even with a dog.
夏はオープンテラスの席が人気だ。
Open-air terrace seats are popular in summer.