1. of, relating to, or serving as confirmation; providing or tending to provide proof or support for something
Usage: formal; often used in religious, legal, or academic contexts

Examples

• The laboratory results provided confirmational evidence for the initial diagnosis.
• A second witness gave confirmational testimony that supported the defendant's alibi.
• The confirmational letter arrived within two weeks of the application.
• Confirmational data from multiple studies strengthened the researcher's conclusions.
• The bishop performed the confirmational rite for the young members of the congregation.