戸外で

outdoors

→ 戸外
phrase Rare #32,226
outdoors Used to describe an activity taking place outside. 戸外 is somewhat formal; in everyday speech, 外で is more common.
JA: 天気がよかったので、戸外で昼食を食べた。
EN: The weather was nice, so we ate lunch outdoors.

その日は戸外で過ごした

I spent that day outdoors.

私達は戸外で楽しく過ごした

We had a great time outdoors.

戸外で運動しなさい

Exercise outdoors.

私達は激しい暑さのため戸外で遊べなかった

We couldn't play outside because of the intense heat.