confirmation

An official indicator that things will happen as planned.

We will send you a written confirmation of your hotel booking.

A verification that something is true or has happened.

The announcement in the newspaper was a confirmation of my suspicions.

They declare ringing confirmation for their theories even in the face of feeble data.

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.

An act whereby something conditional or voidable is made sure and unavoidable, especially the possession of an estate.