noun
outdoor swimming pool
Refers to a swimming pool located outdoors, as opposed to an indoor pool (屋内プール). Common in contexts like hotels, sports facilities, and summer activities.
このホテルには屋外プールがあります。
This hotel has an outdoor swimming pool.
夏になると屋外プールが賑わう。
In summer, the outdoor pool gets crowded.
屋内プール means an indoor swimming pool, contrasting with 屋外プール which is outdoors.
Compound of 屋外 (outdoors) and プール (pool, from English 'pool').