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Updated June 2026
A province in east-central Canada, the most populous province in the country. Also refers to Lake Ontario, one of the five Great Lakes of North America.
“Ontario is home to Canada's capital city, Ottawa, and its largest city, Toronto.”
/ɒnˈtɛə.ri.əʊ/
on·tar·i·o
Proper noun not typically used; contains three O's
7 points but not allowed as a proper noun
Shorter words formed from the letters in “ontario”.
Look up ontario in an authoritative dictionary for full definitions, pronunciation, and etymology.
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