Ontario
geographical name
On·tar·io än-ˈter-ē-ˌō 
1
province of eastern Canada between the Great Lakes and Hudson Bay and bordering on the United States (New York, Michigan, and Minnesota); capital Toronto area 350,814 square miles (908,608 square kilometers), population 12,851,821
Note: Ontario is the most populous province of Canada.
2
city in southwestern California northwest of Riverside population 163,924
Ontarian
än-ˈter-ē-ən
adjective or noun