the smallest of the Great Lakes
"Lake Ontario is the smallest of the five Great Lakes, making it a popular spot for summer boating in Canada."
a prosperous and industrialized province in central Canada
"Ontario is home to many of Canada's largest cities and manufacturing hubs, making it the most populous and economically significant province in the country."
A lake, Lake Ontario, between Ontario province and New York State.
"The ferry crossed Lake Ontario to connect the city of Toronto with Buffalo in New York State."
The name Ontario likely comes from the Wyandot word ontari꞉io, which literally means "great lake." This term may ultimately trace back to ancient roots in the Proto-North Iroquoian language family.