St. Lawrence

noun

a river in SE Canada, flowing NE from Lake Ontario, forming part of the boundary between New York and Ontario, and emptying into the Gulf of St. Lawrence. 760 miles (1225 km) long.
Gulf of, an arm of the Atlantic between SE Canada and Newfoundland.

Cultural definitions for st. lawrence river

St. Lawrence River

River flowing northeast from Lake Ontario to the Atlantic Ocean. Ontario and Quebec, Canada, and New York state are along its banks.

notes for St. Lawrence River

Important trade route. The St. Lawrence Seaway, a system of locks, allows oceangoing ships to pass between the Atlantic and the Great Lakes.