confirmation

noun4

1. •
   An official indicator that things will happen as planned.

   • We will send you a written confirmation of your hotel booking.
2. •
   A verification that something is true or has happened.

   • The announcement in the newspaper was a confirmation of my suspicions.
3. •
   A ceremony of sealing and conscious acknowledgement of the faith in many Christian churches, typically around the ages of 14 to 18; considered a sacrament in some churches, including Catholicism, but not in most Protestant churches.

   • You got a nice white dress / and a party on your confirmation. / You've got a brand new soul, / mm, and a cross of gold. — 1977
4. •
   An act whereby something conditional or voidable is made sure and unavoidable, especially the possession of an estate.