Legal Definition of Defense: The denial of charges, brought by a plaintiff against a defendant; an answer to a complaint | Learn the legal definition of defense and how it can protect your business. This article explains the concept of defense and provides examples to help you understand its importance. Discover how a strong defense can potentially save you from financial losses. Get authoritative advice on crafting an effective defense, including understanding the allegations, gathering evidence, consulting with legal counsel, and presenting your defense clearly. Protect your rights, reputation, and financial interests by understanding and implementing a solid defense strategy