Noun ontario has 2 senses
  1. Lake Ontario, Ontario - the smallest of the Great Lakes
    --1 is a kind of lake
    --1 is a part of Great Lakes
  2. Ontario - a prosperous and industrialized province in central Canada
    --2 is a kind of
    Canadian province
    --2 is a part of Canada
    --2 has parts:
     Ottawa, Canadian capital, capital of Canada; Hamilton; Kingston; Sault Sainte Marie; Sudbury; Thunder Bay; Toronto; Canadian Falls, Horseshoe Falls; James Bay; Lake St. Clair, Lake Saint Clair; Niagara, Niagara Falls; Severn, Severn River
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