Great Lakes

the Great Lakes pl (normally plural, singular Great Lake)

1. A group of five lakes on the United States–Canada border, consisting of Lake Superior, Lake Michigan and Lake Huron (Lake Michigan–Huron), Lake Erie and Lake Ontario.
   • 2015 October 22, Michael Pearson, “153-year-old shipwreck found in Lake Ontario”, in CNN‎^[1]:

     A ship called the Vandalia out of Oswego is widely credited as the first propeller-driven steamship on the Great Lakes in 1841.

2. A group of lakes located in and around the East African Rift, including Lake Victoria, Lake Tanganyika, Lake Malawi, and several others.