1) Champlain discovery 2) Member of a great quintet 3) Receiver of niagara falls 4) Setting of Main Duck Island 5) View from the CN Tower 
Lake Ontario (Lac Ontario) is one of the five Great Lakes of North America. It is bounded on the north and southwest by the Canadian province of Ontario, and on the south and east by the American state of New York. Ontario, Canada`s most populous province, was named for the lake. In the Wyandot (Huron) language, ontarío means `Lake of Shining ......
[n] - the smallest of the Great Lakes
Ontario noun the smallest of the Great Lakes