A do-not-resuscitate (DNR) order is a legal document that instructs medical personnel not to perform cardiopulmonary resuscitation (CPR) if a patient's heart stops beating or they stop breathing. This order is typically used for patients with terminal illnesses or those who wish to avoid aggressive medical interventions at the end of life. DNR orders are part of advance care planning and can be discussed with healthcare providers, family members, and legal advisors. They ensure that a patient's wishes regarding life-sustaining treatments are respected, allowing for a more peaceful end-of-life experience in accordance with their values and preferences.