Wikipedia
The Queen-in-Council (during the reign of a male monarch, King-in-Council) is the technical term of constitutional law for the exercise of executive authority in a Commonwealth realm, denoting the monarch acting by and with the advice and consent of his or her privy council (in the United Kingdom and Canada's federal jurisdiction) or executive council (in most other Commonwealth realms, Australian states, and in Canadian provinces). In those realms and dependencies where the Queen's powers and functions are delegated to a governor-general, lieutenant governor, or governor, the term Governor-General-in-Council, Lieutenant-Governor-in-Council, or Governor-in-Council may be used instead of Queen-in-Council, respectively, although all of these terms describe the same technical process within constitutional law. "The government of [ jurisdiction]" is commonly used as a synonym for any of the aforementioned terms, though the phrase may mean more than one thing in certain areas.
An order made by the Queen-in-Council is known as an Order-in-Council and such actions are subject to judicial review. Orders-in-Council may be used to implement secondary legislation such as UK Statutory Instruments. In practice, decisions made by the Queen-in-Council are almost always the formal approval to decisions made by the cabinet, a subcommittee of the privy or executive council that includes the senior ministers of the Crown and often meets without the Queen or her local representative present.
Former Commonwealth realms and dependencies often retain a similar constitutional concept; for example, President-in-Council or Chief Executive-in-Council. Similar concepts can also be found in some non-Commonwealth countries.