Noun
1. additional proof that something that was believed (some fact or hypothesis or theory) is correct;
"fossils provided further confirmation of the evolutionary theory"2. information that confirms or verifies
3. making something valid by formally ratifying or confirming it;
"the ratification of the treaty""confirmation of the appointment"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