Ontario

[on-tair-ee-oh]

noun

1. a province in southern Canada, bordering on the Great Lakes. 412,582 square miles (1,068,585 square kilometers). Toronto.

2. Lake Ontario, a lake between the northeastern United States and southern Canada, between New York and Ontario province: the smallest of the Great Lakes. 193 miles (310 kilometers) long; 7,540 square miles (19,530 square kilometers).

3. a city in southwestern California, east of Los Angeles.

Ontario

/ ɒnˈtɛərɪəʊ /

noun

1. Abbreviation: Ont..  ON. a province of central Canada: lies mostly on the Canadian Shield and contains the fertile plain of the lower Great Lakes and the St Lawrence River, one of the world's leading industrial areas; the second largest and the most populous province. Capital: Toronto. Pop: 12 392 721 (2004 est). Area: 891 198 sq km (344 092 sq miles)

2. a lake between the US and Canada, bordering on New York State and Ontario province: the smallest of the Great Lakes; linked with Lake Erie by the Niagara River and Welland Canal; drained by the St Lawrence. Area: 19 684 sq km (7600 sq miles)

Ontario

1. Province in central Canada, bordered by Hudson Bay and James Bay to the north; Quebec to the east; the St. Lawrence River, Lake Ontario, Lake Erie, Lake Huron, Lake Superior, and Minnesota to the south; and Manitoba to the west. Its capital and largest city is Toronto.

Ontario is the most heavily industrialized, populous, and prosperous province in Canada.

The Canadian side of Niagara Falls is in southern Ontario.

Ottawa, Canada's capital, is in southeastern Ontario.

Other Word Forms

• Ontarian adjective
• Ontaric adjective

Example Sentences

Every day, nine million Americans wake up, go to work and earn a paycheck making something for or providing a service to a company based in Ontario.

Read more on The Wall Street Journal

The Ontario government had the temerity to buy ad time to run clips of Reagan’s 1987 remarks warning about the dangers of protectionism.

Read more on The Wall Street Journal

Three-quarters of Canadian exports are sold to the US, and Ontario is home to the bulk of Canada's automobile manufacturing.

Read more on BBC

In response, Ontario Premier Doug Ford said that he would call off the campaign, effective Monday.

Read more on The Wall Street Journal

His tariffs have forced job losses across several key sectors, and late Thursday, he announced he was ending trade talks over an anti-tariff ad produced by the government of Ontario province.

Read more on Barron's