Legal Definition of Affirm: To confirm or ratify; a Court Of Appeals affirms or disaffirms a decision of a lower court | Learn about the legal definition of affirm and its importance for business owners. Discover how affirmation impacts court decisions and the potential outcomes of legal proceedings. Gain a solid understanding of this term to navigate the complexities of the legal world. Get informed, anticipate outcomes, and ensure your business operates within the boundaries of the law