(chemistry) a process in which one or more substances are changed into others
a bodily process occurring due to the effect of some antecedent stimulus or agent
(military) military action or resources protecting a country against potential enemies
(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 speech act of answering an attack on your assertions
the federal department responsible for safeguarding national security of the United States; created in 1947
