noun (military) military action or resources protecting a country against potential enemies
noun protection from harm
noun (sports) the team that is trying to prevent the other team from scoring
noun the justification for some act or belief
noun (psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires
noun the federal department responsible for safeguarding national security of the United States; created in 1947
noun the defendant and his legal advisors collectively
noun the speech act of answering an attack on your assertions
noun an organization of defenders that provides resistance against attack
noun a structure used to defend against attack
noun a defendant's answer or plea denying the truth of the charges against him
noun the act of defending someone or something against attack or injury
Source: WordNet 3.1, Princeton University