A lagoon is a shallow body of water protected from a larger body of water (usually the ocean) by sandbars, barrier islands, or coral reefs. Lagoons are often called estuaries, sounds, bays, or even lakes. Chilika lake, Pulikat Lake and Kaliveli Lake are some of the examples of lagoons in India. Further Reading: Erosional landforms Geomorphic Processes Discover Lagoon 's world of luxury catamarans, offering sea trials and tours to experience their innovative designs and craftsmanship. LAGOON definition: 1. an area of sea water separated from the sea by a reef (= a line of rocks and sand): 2. an area…. Learn more.