The Great Lakes, also known as the Laurentian Great Lakes, are a group of five large freshwater lakes in North America. The lakes, which together form the largest group of freshwater lakes in the world, are Lake Superior, Lake Michigan, Lake Huron, Lake Erie, and Lake Ontario. Synonyms for the Great Lakes include the Laurentian Lakes, the Freshwater Seas, the Great Inland Seas, and the North American Great Lakes. These synonyms reflect the importance and magnitude of these lakes, which not only provide drinking water and recreation opportunities for millions of people, but also support wildlife and ecosystems that are vital to the region.