A sea generally refers to a large body of salt water, but the term is used in other contexts as well. Most commonly, the term refers to a large expanse of saline water connected with an ocean, and is commonly used as a synonym for ocean. It is also used sometimes to describe a large saline lake that lacks a natural outlet, such as the Caspian Sea. List of seas Atlantic Ocean Adriatic Sea Aegean Sea Alboran Sea Argentine Sea Bay of Biscay Bay of Bothnia Bay of Campeche Bay of Fundy Baltic S… (More on Sea)