1. check, confirmation, substantiation, verification

additional proof that something that was believed (some fact or hypothesis or theory) is correct

Example Sentences:
'fossils provided further confirmation of the evolutionary theory'

• check
• substantiation
• verification

2. confirmation

information that confirms or verifies

3. confirmation, ratification

making something valid by formally ratifying or confirming it

Example Sentences:
'the ratification of the treaty'
'confirmation of the appointment'

• ratification

4. confirmation

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. confirmation

a sacrament admitting a baptized person to full participation in the church