First minister in the context of "Leader of the Opposition"

The premier of Quebec (French: premier ministre du Québec [pʁəmje ministʁ dy kebɛk] (masculine) or première ministre du Québec [pʁəmjɛʁ-] [feminine]) is the first minister and head of government of the Canadian province of Quebec. The current premier of Quebec is François Legault of the Coalition Avenir Québec, sworn in on October 18, 2018, following that year's election.

The Executive Council of Ontario (French: Conseil des ministres de l'Ontario), often informally referred to as the Cabinet of Ontario (French: Cabinet de l'Ontario), is the cabinet and the executive committee of the provincial government of the Canadian province of Ontario. It comprises ministers of the Crown in right of Ontario, who are selected by the premier of Ontario (the first minister) and formally appointed by the lieutenant governor. The activities of the Government of Ontario are directed by the Executive Council.

The council serves a similar function as the Privy Council for Canada. The "Crown in right of Ontario" is the legal entity that owns government property, employs public servants, and acts in legal proceedings like criminal prosecutions. Accordingly, the cabinet exercises executive and sovereign powers within Ontario's jurisdiction in the name of the monarch "in right of Ontario". Similar to decisions of the federal cabinet, executive decisions by the Ontario cabinet are known as Order-in-Council, formally issued by in the name of the lieutenant governor, the monarch's representative in the province, on the advice of the ministers. Though the lieutenant governor does not generally attend cabinet meetings, cabinet directives are said to be ordered by the Lieutenant Governor-in-Council.

A minister-president or minister president is the head of government in a number of European countries or subnational governments with a parliamentary or semi-presidential system of government where they preside over the council of ministers. It is an alternative term for prime minister, premier, chief minister, or first minister and very similar to the title of president of the council of ministers.