confirmation

noun

1.
additional proof that something that was believed (some fact or hypothesis or theory) is correct
Derived from:
confirm
2.
information that confirms or verifies
Derived from:
confirm
3.
making something valid by formally ratifying or confirming it
Derived from:
confirm
4.
a ceremony held in the synagogue (usually at Pentecost) to admit as adult members of the Jewish community young men and women who have successfully completed a course of study in Judaism
5.
a sacrament admitting a baptized person to full participation in the church