lagoon

A shallow body of water, especially one separated from a sea by sandbars or coral reefs.

A shallow artificial pond used for treating or storing liquid waste material or for collecting flood waters.

An area of shallow water, or even of marshy land, bordering on the sea, and usually separated from the region of deeper water outside by a belt of sand or of sand-dunes, more or less changeable in position.

With reference to Tuscany and some other parts of Italy, the basin of a hot spring, especially one from which borax is obtained: from the Italian use of lagone in this sense.

In occasional use, the area of still water inclosed within an atoll, which is often called a lagoon island. See atoll.

A shallow sound, channel, pond, or lake, especially one into which the sea flows.

A lake in a coral island, often occupying a large portion of its area, and usually communicating with the sea. See Atoll.

a coral island consisting of a narrow reef encircling a lagoon.

A shallow body of water separated from deeper sea by a bar.

a body of water cut off from a larger body by a reef of sand or coral