drainage

US /ˈdreɪ.nɪdʒ/
UK /ˈdreɪ.nɪdʒ/
"drainage" picture
1.

the action or process of draining something

:
Proper drainage is essential for healthy crops.
The city invested in a new drainage system.
2.

a system of drains

:
The old house had poor drainage.
They are working to improve the drainage in the area.