I. (ˈ)än.|terēən, -ta(a)r-, -tār- adjective
Usage: usually capitalized
Etymology: Ontario, province of southern and central Canada + English -an, adjective suffix
1. : of, relating to, or characteristic of the province of Ontario in south central Canada
2.
[Lake Ontario, lake lying between the state of New York and the Canadian province of Ontario + English -an, adjective suffix]
: of, relating to, or characteristic of Lake Ontario lying between the state of New York and Canada
II. noun
also on·tar·io·an ̷ ̷ˈ ̷ ̷ ̷ ̷ˌōən
( -s )
Usage: capitalized
Etymology: Ontario (province) + English -an, n. suffix
: a native or inhabitant of the province of Ontario in Canada