Great Lake
/ˌɡreɪt ˈleɪk/noun
1In plural The five lakes Superior, Huron, Michigan, Erie, and Ontario, which lie between Canada and the United States.
2In representations of the speech of North American Indians: the North Atlantic Ocean. Compare the great pond.
3The Mediterranean Sea.
Origin
Mid 17th century; earliest use found in William Wood (fl. 1629–1635), writer on America. From great + lake.