floodwall

noun
UK /ˈflʌdwɔːl/
US /ˈflʌdwɔːl/

A floodwall is a strong wall built to stop water from flooding a place.

The town built a floodwall along the river to keep the houses safe.


OTHER MEANINGS

2. A concrete or steel structure raised beside a river or coast to hold back high water.

Engineers inspected the floodwall before the storm season began.

3. A temporary barrier set up during an emergency to divert rising water.

Volunteers stacked sandbags to reinforce the floodwall.

4. Any wall-like defense that keeps water away from buildings or roads.

The new floodwall protects the subway entrance from heavy rain.