confirmation in WordNet English dictionary

1. additional proof that something that was believed (some fact or hypothesis or theory) is correct
   "fossils provided further confirmation of the evolutionary theory"
   confirmation  verification  check  substantiation 
   
2. a sacrament admitting a baptized person to full participation in the church
   confirmation 
   
3. 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
   confirmation 
   
4. information that confirms or verifies
   confirmation 
   
5. making something valid by formally ratifying or confirming it
   "the ratification of the treaty"; "confirmation of the appointment"
   ratification  confirmation