Definition that contains lake ontario
- hamilton a port city in southeastern Ontario at the western end of Lake Ontario
- niagara a river flowing from Lake Erie into Lake Ontario; forms boundary between Ontario and New York
- kingston a town in southeast Ontario on Lake Ontario near the head of the Saint Lawrence River
- seneca a member of the Iroquoian people formerly living in New York State south of Lake Ontario
- oneida a member of the Iroquoian people formerly living east of Lake Ontario
- niagara river a river flowing from Lake Erie into Lake Ontario; forms boundary between Ontario and New York