Lake Superior

n. largest of the North American Great Lakes and largest freshwater lake in the world (located between the north central United States and south Ontario in Canada)

Lake Superior is the largest of the five Great Lakes of North America. It is bounded to the north by Ontario, Canada and Minnesota, USA, and to the south by the U.S. states of Wisconsin and Michigan. It is the largest freshwater lake in the world by surface area and is the world's fourth-largest freshwater lake by volume.
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Noun
1. the largest freshwater lake in the world; the deepest of the Great Lakes
(synonym) Superior
(hypernym) lake
(part-holonym) Great Lakes