investiture investiture /ˌɪnˈvɛstətʃɝ/

noun

1. The ceremonial act of clothing someone in the insignia of an office; the formal promotion of a person to an office or rank  ( investiture , investment )
   the ceremonial act of clothing someone in the insignia of an office; the formal promotion of a person to an office or rank
   
2. The ceremony of installing a new monarch  ( coronation , enthronement , enthronisation [British] , enthronization , investiture )
   the ceremony of installing a new monarch