To·ron·to (tə-rŏn'tō) The capital and largest city of Ontario, Canada, in the southern part of the province on Lake Ontario. Originally a French trading post, it was founded as York by the British in 1793 and renamed as Toronto in 1834. Toronto is an important Great Lakes port and an industrial center. Population: 2,500,000.
Capital of Ontario, Canada, and the largest city in the province, in southern Ontario on Lake Ontario; the largest city in Canada; a commercial, financial, industrial, and cultural center of Canada.