defense - noun

(military) military action or resources protecting a country against potential enemies

protection from harm

(sports) the team that is trying to prevent the other team from scoring

the justification for some act or belief

(psychiatry) an unconscious process that tries to reduce the anxiety associated with instinctive desires

the federal department responsible for safeguarding national security of the United States; created in 1947

the defendant and his legal advisors collectively

the speech act of answering an attack on your assertions

an organization of defenders that provides resistance against attack

a structure used to defend against attack

a defendant's answer or plea denying the truth of the charges against him

the act of defending someone or something against attack or injury

defense - thesaurus

defence   demurrer   denial   dod   refutation   vindication