What is Affirmance?

Legal Definition
The confirmation of a voidable act; as, for example, when an infant enters into a contract, which is not binding upon him, if, after attaining his full age, he gives his affirmance to it, he will thereafter be bound, as if it had been made when of full age. 10 N. H. Rep. 194.

2. To be binding upon the infant, the affirmance must be made after arriving of age, with a full knowledge that it would be void without such confirmation. 11 S. & R. 305.

3. An affirmance may be express, that is, where the party declares his determination of fulfilling the contract; but a more acknowledgment is not sufficient. Dudl. R, 203. Or it may be implied, as, for example, where an infant mortgaged his land and, at full age, conveyed it, subject to the mortgage. 15 Mass. 220. See 10 N. H. Rep. 561.
-- Bouviers Law Dictionary
Legal Definition
In practice. The confirming or ratifying a former law or judgment. Cowell; Blount. The confirmation and ratification by an appellate court of a judgment, order, or decree of a lower court brought before it for review. See Affirm. ' A dismissal of an appeal for want of prosecution is not an "affirmance" of the judgment. Drummond v. Husson. 14 N. Y. 60. The ratification or confirmation of a voidable contract or act by the party who is to be bound thereby. The term is in accuracy to be distinguished from ratification, which is a recognition of the validity or binding force as against the party ratifying, of some act performed by another person; and from confirmation, which would seem to apply more properly to cases where a doubtful authority has been exercised by another in behalf of the person ratifying; but these distinctions are not generally observed with much care. Bouvier.
-- Black's Law Dictionary
Legal Definition
Confirmation of a judgment or order of court, as on an appeal.
-- Ballentine's Law Dictionary