Affirm

1. To make a solemn declaration, before an authorized magistrate or tribunal, under the penalties of perjury; to testify by affirmation.
2. To declare or assert positively.
3. To assert positively; to tell with confidence; to aver; to maintain as true; -- opposed to deny.
4. To declare, as a fact, solemnly, under judicial sanction. See Affirmation, 4.
5. to assert or confirm, as a judgment, decree, or order, brought before an appellate court for review.