investiture

Short definition from Wiktionary

Noun

1. 1
   The act of investing, as with possession or power; formal bestowal or presentation of a possessory or prescriptive right.
2. 2
   The formal installation or, generally, the appointment of a bishop, or (uncountable) bishops in general.
3. 3
   That which invests or clothes; covering; vestment.
4. 4
   The parliamentary vote required to inaugurate the Prime Minister of Spain.