Definition of "Ontario"

A lake, Lake Ontario, between Ontario province and New York State.  examples

A province in eastern Canada. Capital: Toronto.  examples

A village in the Cayo District, Belize.  examples

A city in San Bernardino County, California.  examples

An unincorporated community in Knox County, Illinois.  examples

An unincorporated community in Lima Township, LaGrange County, Indiana, United States.  examples

A community in Ames, Story County, Iowa, United States.  examples

Short for Ontario County, New York.  examples

A town, hamlet, and census-designated place in Wayne County, New York.  examples

A city in Richland County, Ohio.  examples

A city in Malheur County, Oregon.  examples

A locality in North Bethlehem, Washington County, Pennsylvania.  examples

A locality in Charlotte County, Virginia.  examples

A village in Vernon County, Wisconsin.  examples