advance directive
ad·vance di·rec·tive
noun \əd-ˈvan(t)s-də-ˈrek-tiv, -dī-\Definition of ADVANCE DIRECTIVE
: a legal document (as a living will) signed by a living competent person in order to provide guidance for medical and health-care decisions (as the termination of life support and organ donation) in the event that the person becomes incompetent to make such decisions
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