Legal Definition of Affair: A lawsuit; a matter. Also, a love relationship, usually nonmarital | Get a comprehensive explanation of the legal definition of affair and its implications in various contexts. Understand how it relates to lawsuits, legal matters, love relationships, and its significance in family law. Discover why understanding this definition is crucial for effective communication, informed decision-making, and protecting your business’s interests. Navigate legal matters confidently and ensure the best outcomes for your business