Are the St Lawrence River and Seaway same thing?

The St Lawrence River and the St Lawrence Seaway are related but distinct entities. The St Lawrence River is a natural waterway that flows from Lake Ontario to the Atlantic Ocean and forms the border between Canada and the United States. The St Lawrence Seaway, on the other hand, is a system of locks, canals, and dams that enables ships to bypass the natural rapids and shallows of the St. Lawrence River and navigate between the Great Lakes and the Atlantic Ocean. The Seaway is a vital shipping route for both Canada and the United States and allows large vessels to travel between the two bodies of water.