Refers to the lake created in the middle of the Jordan River and its surrounding area.

It was the region where Jesus mainly ministered, and the Sea of Galilee was so large that it was also called "the sea."
It was also called by other names such as Kinneret, or Gennesaret.
Josh 13:27and in the valley, Beth-haram, Beth-nimrah, Succoth, and Zaphon, the rest of the kingdom of Heshbon, of Sihon king of Heshbon, the Jordan and its border, as far as the end of the Sea of Kinnereth, on the other side of the Jordan eastward.
Luke 5:1While the crowd was pressing in on him to hear the word of God, he was standing by the lake of Gennesaret.