Ontario

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geographical name On·tar·io \än-ˈter-ē-ˌō\

Definition of Ontario

  1. 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 Ontario is the most populous province of Canada.

  2. 2 city in southwestern California northwest of Riverside population 163,924

Ontarian

play \-ē-ən\ adj or noun

ONTARIO Defined for English Language Learners

Ontario

play
geographical name On·tar·io \än-ˈter-ē-ˌō\

Definition of Ontario for English Language Learners

  • : province of Canada

  • : U.S. city, California

  • Lake Ontario : lake in the U.S. and Canada


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