Investiture, from the Latin (preposition in and verb vestire, 'dress' from vestis 'robe') is a rather general term for the formal installation of an incumbent

Incumbent

The incumbent, in politics, is the existing holder of a political office. This term is usually used in reference to elections, in which races can often be defined as being between an incumbent and non-incumbent. For example, in the 2004 United States presidential election, George W...

as the insignia can include the formal dress and adornment (robes of state, headdress etc.) the etymology refers to, but also other regalia in the widest sense, such as a throne or other seat of office, the word is a convenient generic term, also for such more specific cases as coronation

Coronation

A coronation is a ceremony marking the formal investiture of a monarch and/or their consort with regal power, usually involving the placement of a crown upon their head and the presentation of other items of regalia...

 (see that article and regalia

Regalia

Regalia is Latin plurale tantum for the privileges and the insignia characteristic of a Sovereign.The word stems from the Latin substantivation of the adjective regalis, 'regal', itself from Rex, 'king'...

 for more on such ceremonies) and enthronement

Enthronement

An enthronement is a ceremony of inauguration, involving a person—usually a monarch or religious leader—being formally seated for the first time upon their throne. This ritual is generally distinguished from a coronation because there is no crown or other regalia that is physically...

, though these are also used (rather imprecisely, by analogy) in such extended sense.

Secular usage

The term is used to describe the installation of individuals in institutions that usually have been extant from feudal times. For example, the installation of heads of state and various other state functions with ceremonial roles are invested with office. Usually the investiture involves ceremonial transfer of the symbols of the particular office

Judges in many countries, including justices of the Supreme Court of the United States

Supreme Court of the United States

The Supreme Court of the United States is the highest court in the United States. It has ultimate appellate jurisdiction over all state and federal courts, and original jurisdiction over a small range of cases...

, are invested with their office. American justices typically take two oaths: one to uphold the Constitution of the United States, and the other to apply justice equally. Likewise, university presidents, rectors and chancellors are invested with office.

In the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

, around 2,600 people are invested personally by The Queen

Elizabeth II of the United Kingdom

Elizabeth II is the constitutional monarch of 16 sovereign states known as the Commonwealth realms: the United Kingdom, Canada, Australia, New Zealand, Jamaica, Barbados, the Bahamas, Grenada, Papua New Guinea, the Solomon Islands, Tuvalu, Saint Lucia, Saint Vincent and the Grenadines, Belize,...

 or a member of the Royal Family

British Royal Family

The British Royal Family is the group of close relatives of the monarch of the United Kingdom. The term is also commonly applied to the same group of people as the relations of the monarch in her or his role as sovereign of any of the other Commonwealth realms, thus sometimes at variance with...

. A list of those to be honoured is published twice a year, in either the New Year's Honours List or The Queen's Birthday Honours List.
Approximately 24 investitures are held annually in Buckingham Palace

Buckingham Palace

Buckingham Palace, in London, is the principal residence and office of the British monarch. Located in the City of Westminster, the palace is a setting for state occasions and royal hospitality...

 and Windsor Castle

Windsor Castle

Windsor Castle is a medieval castle and royal residence in Windsor in the English county of Berkshire, notable for its long association with the British royal family and its architecture. The original castle was built after the Norman invasion by William the Conqueror. Since the time of Henry I it...

, one at the Palace of Holyroodhouse in Edinburgh

Edinburgh

Edinburgh is the capital city of Scotland, the second largest city in Scotland, and the eighth most populous in the United Kingdom. The City of Edinburgh Council governs one of Scotland's 32 local government council areas. The council area includes urban Edinburgh and a rural area...

, Scotland

Scotland

Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

. Previously, one investiture ceremony a year would also be held in Cardiff

Cardiff

Cardiff is the capital, largest city and most populous county of Wales and the 10th largest city in the United Kingdom. The city is Wales' chief commercial centre, the base for most national cultural and sporting institutions, the Welsh national media, and the seat of the National Assembly for...

.