drainage
🇺🇸
/ˈdreɪnɪdʒ/
🇬🇧
/ˈdreɪnɪdʒ/
the way water flows away from an area
The garden has good drainage, so water doesn't stay on the ground.
この庭は排水が良いので、水が地面に溜まりません。
a system of pipes that carries water away
The city's drainage system helps prevent flooding during heavy rain.
市の排水システムは、大雨の際の洪水防止に役立ちます。