The term of water body can be summarized as SEA, which is a three letter word. SEA stands for a large body of water that is partially or completely surrounded by land. It is usually larger than a lake and is often part of an ocean. The world's seas are connected to each other and to the oceans, making them an important part of the global water cycle. Seas are home to a variety of marine life and are important for transportation, fishing, and recreation.