Term of office
A term of office, electoral term, or parliamentary term is the amount of time a person serves in a after being elected for an office. In many jurisdictions, there is a limit on how long the term of office may be before the officeholder must be subject to a re-election. Some jurisdictions have term limits, which means it sets a maximum number of terms an individual may hold in a particular office.
United Kingdom
As the origin of the Westminster system, this system of government are replicated in many other countries.
Monarch
The monarch serves as head of state until their death or abdication.