A terminal illness or terminal condition was an incurable disease that ended with the death of the patient. Caring for those afflicted with these types of diseases could be difficult, particularly if one was the patient's sole source of comfort. (DS9: "Ties of Blood and Water")

In 2364, Jean-Luc Picard described the Aldean civilization as being terminally ill, as they were incapable of reproducing. (TNG: "When The Bough Breaks")

In 2368, Picard asked William T. Riker whether he would see death as a release if he was facing a terminal, incurable illness (TNG: "Ethics")

Later that year, Deanna Troi compared Data's finding his own severed head to discovering that a loved one had a terminal illness. (TNG: "Time's Arrow")

Acute anxiety could result upon one's diagnosis with a terminal illness. In 2376, The Doctor described Lewis Zimmerman as suffering from anxiety related to his terminal illness. (VOY: "Life Line")

Terminal illnessesEdit