lagoon.

A shallow body of coastal water separated from the open sea by a barrier such as sand or a reef.

Use it for

Words that belong together

• coastal lagoon
• tidal lagoon
• reef lagoon

On the page

The lagoon lay still behind the sand ridge.

Fish flashed in the warm shallows of the lagoon.

At high tide, seawater entered the lagoon through a narrow channel.

Usage notes

Primary category: environment. Also used for water enclosed within an atoll; not simply any small lake. Plural: lagoons